LEM Avalon AV12-4 User manual

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Soldering point.
Male connector.
Female connector.
M/F faston connector.
Test point.
Supply voltage. Logic supply ground.
Analog supply ground.
Chassis ground.
Earth ground.
Flag joined with one or more flags
GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. [phone] - fax [phone]
GENERALMUSIC on the NET: http://www.generalmusic.com
SERVICE MANUAL
L CODE: 270241 M
Warnings
with the same signal name inscribed.
Address
ATTENTION
Observe precautions when handling electrostatic sensitive devices.
Notice
Service must be carried out by qualified personnel only.Any tampering carried out by unqualified personnel during the guarantee period
will forfeit the right to guarantee.
For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.
To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.
All components marked by this symbol have special safety characteristics, when replacing any of these components use only
manufacturer's specified parts.
The (µ) micro symbol of capacitance value is substituted by U.
The (
Ω
) omega symbol of resistance value is substituted by E.
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified.
All resistors are 1/8
Ω
unless otherwise specified.
All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.
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Index
Technical Specifications
2
AV12-4, AV12-8, AV15-4, AV15-8, AV15S Passive Versions Schematic Diagrams
2
AV12-4, AV12-8, AV15-4, AV15-8, AV15S Passive Versions Spare Part List
3
4
AV12A Test Procedures & Adjustment
AV12A, AV15A, AV15SA Block Diagrams
3
AV15A Test Procedures & Adjustment
5
AV15SA Test Procedures & Adjustment
5
AV12A Schematic Diagram
8
9
AV15SA Schematic Diagram
AV15A Schematic Diagram
7
10
AV12A, AV15A, AV15SA Active Version Spare Part List

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AV-12
AV-15
AV-15S
COMPONENTS
High
Low
1" tweeter with phasing
plug and EWT horn
12" woofer
1" compression driver
with EWT horn
15" woofer
15" woofer
POWER HANDLING
(EIA RS-426A)
W continuous
W peak
200
400
350
600
350
600
IMPEDANCE
Ohms
4 / 8
4 / 8
4
PASSIVE CROSSOVER
Hz
5 kHz
8
Ω
: 6 / 12 dB/oct.
4
Ω
: 0 / 12 dB/oct.
2,6 kHz
8
Ω
: 6 / 12 dB/oct.
4
Ω
: 12 / 18 dB/oct.
200 Hz
12 / 6 dB/oct.
CONNECTIONS (passive versions)
4-way SPEAKON + JACK (input + link)
CONSTRUCTION
High density polyetylene enclosure + polyetylenic foam
Protection metal grid
DIMENSIONS
mm (WxHxD)
436x616x420
500x706x490
500x706x490
WEIGHT (passive / active)
kg
15 / 18,5
20 / 26
18,5 / 24,5
EIA OUTPUT POWER
(1kHz, max THD 1%)
W
180
300
300
POTENZA D’USCITA IHF
(Tone burst 10% 20 ms
Max THD 0,1%)
W
200
350
350
INPUT SENSITIVITY
dB (V)
0 (0.775V)
INPUT IMPEDANCE
kohms
30 (balanced) - 15 (unbalanced)
ACTIVE CROSSOVER
Hz
From 80 to 320 @ 12db/oct.
DISTORSION
%
<0.02 (THD+Noise)
CONTROLS
Volume - Shield on/off - XOVER frequency (AV-15SA)
DISPLAY
SIGNAL/LIMIT LED - ON LED
CONNECTIONS
COMBO + XLR-M (input + link)
COMBO + XLR-M (input)
XLR-M (output)
POWER SUPPLY
See label on the apparatus
SENSITIVITY (SPL 1W/1m)
dB
97
99
97
MAX SPL continuous
dB
120
124
122
MAX SPL peak
dB
123
127
125
FREQUENCY RESPONSE
Hz (-10dB)
70-20000
60-20000
50-200
DISPERSION (OxV)
60x40
60x40
NOTE:
* Measured with the anti-clipping circuit off.
SYSTEM SPECIFICATIONS
AMPLIFIER SPECIFICATIONS (active versions)
AVALON TECHNICAL SPECIFICATIONS
LOUDSPEAKER SPECIFICATIONS
Transistor PackagesTransistor Packages
Transistor PackagesTransistor Packages
Transistor Packages
TO92TO92
TO92TO92
TO92 TO126TO126
TO126TO126
TO126 TO220TO220
TO220TO220
TO220 TO218TO218
TO218TO218
TO218 TO264TO264
TO264TO264
TO264
BC550, BC560:BC550, BC560:
BC550, BC560:BC550, BC560:
BC550, BC560: MJE340, MJE350,MJE340, MJE350,
MJE340, MJE350,MJE340, MJE350,
MJE340, MJE350, MJE15030,MJE15031:MJE15030,MJE15031:
MJE15030,MJE15031:MJE15030,MJE15031:
MJE15030,MJE15031: TIP35C,TIP36C,TIP35C,TIP36C,
TIP35C,TIP36C,TIP35C,TIP36C,
TIP35C,TIP36C, MJL21193,MJL21193,
MJL21193,MJL21193,
MJL21193,
1=Collector MJE802:MJE802:
MJE802:MJE802:
MJE802: 1=Base MJE4342, MJE4352:MJE4342, MJE4352:
MJE4342, MJE4352:MJE4342, MJE4352:
MJE4342, MJE4352: MJL21194:MJL21194:
MJL21194:MJL21194:
MJL21194:
2=Base 1=Emitter 2=Collector 1=Base 1=Base
3=Emitter 2=Collector 3=Emitter 2=Collector 2=Collector
2N5401, 2N55502N5401, 2N5550
2N5401, 2N55502N5401, 2N5550
2N5401, 2N5550 3=Base 4=Collector 3=Emitter 3=Emitter
1=Emitter 4=Collector 4=Collector 4=Collector
2=Base
3=Collector

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Spare Part List (PASSIVE VERSIONS)Spare Part List (PASSIVE VERSIONS)
Spare Part List (PASSIVE VERSIONS)Spare Part List (PASSIVE VERSIONS)
Spare Part List (PASSIVE VERSIONS)
Code Description
AccessoriesAccessories
AccessoriesAccessories
Accessories
277334 Owner’s Manual
AV-12 4 OhmAV-12 4 Ohm
AV-12 4 OhmAV-12 4 Ohm
AV-12 4 Ohm
778112 Cables Assembly
727601 Inputs Panel Assembly AV-12/4 Ohm
778144 * Jack-Speakon Cables Assembly
141200 ** Speakon Socket (NL4MP Neutrik)
140193 ** Jack Mono Socket
768202768202
768202768202
768202 **
**
*Crossover Filter Board (Pcb#313063) AV-12/4 OhmCrossover Filter Board (Pcb#313063) AV-12/4 Ohm
Crossover Filter Board (Pcb#313063) AV-12/4 OhmCrossover Filter Board (Pcb#313063) AV-12/4 Ohm
Crossover Filter Board (Pcb#313063) AV-12/4 Ohm
667692 * Rear Panel AV-12/4 Ohm
667702 Handle
667700 Grid
657270 EWT(TM) Elliptical Horn
657267 Box
229037229037
229037229037
229037 1" 4ohm Horn Tweeter1" 4ohm Horn Tweeter
1" 4ohm Horn Tweeter1" 4ohm Horn Tweeter
1" 4ohm Horn Tweeter
227056227056
227056227056
227056 12" 4ohm Woofer Speaker12" 4ohm Woofer Speaker
12" 4ohm Woofer Speaker12" 4ohm Woofer Speaker
12" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120964 M4i M5e x17.5mm Threaded Pin for Woofer
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-12 8 OhmAV-12 8 Ohm
AV-12 8 OhmAV-12 8 Ohm
AV-12 8 Ohm
778112 Cables Assembly
727602 Inputs Panel Assembly AV-12/8 OHM
778144 * Jack-Speakon Cables Assembly
141200 ** Speakon Socket (NL4MP Neutrik)
140193 ** Jack Mono Socket
768203768203
768203768203
768203 **
**
*Crossover Filter Board (Pcb#313063) AV-12/8 OhmCrossover Filter Board (Pcb#313063) AV-12/8 Ohm
Crossover Filter Board (Pcb#313063) AV-12/8 OhmCrossover Filter Board (Pcb#313063) AV-12/8 Ohm
Crossover Filter Board (Pcb#313063) AV-12/8 Ohm
667693 * Rear Panel AV-12/8 Ohm
667702 Handle
667700 Grid
657270 EWT(TM) Elliptical Horn
657267 Box
229038229038
229038229038
229038 1" 8ohm Horn Tweeter1" 8ohm Horn Tweeter
1" 8ohm Horn Tweeter1" 8ohm Horn Tweeter
1" 8ohm Horn Tweeter
227057227057
227057227057
227057 12" 8ohm Woofer Speaker12" 8ohm Woofer Speaker
12" 8ohm Woofer Speaker12" 8ohm Woofer Speaker
12" 8ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120964 M4i M5e x17.5mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-15 4 OhmAV-15 4 Ohm
AV-15 4 OhmAV-15 4 Ohm
AV-15 4 Ohm
778112 Cables Assembly
727603 Inputs Panel Assembly AV-15/4 Ohm
778144 * Jack-Speakon Cables Assembly
141200 ** Speakon Socket (NL4MP Neutrik)
140193 ** Jack Mono Socket
768204768204
768204768204
768204 **
**
*Crossover Filter Board (Pcb#313062) AV-15/4 OhmCrossover Filter Board (Pcb#313062) AV-15/4 Ohm
Crossover Filter Board (Pcb#313062) AV-15/4 OhmCrossover Filter Board (Pcb#313062) AV-15/4 Ohm
Crossover Filter Board (Pcb#313062) AV-15/4 Ohm
667694 * Rear Panel AV-15/4 Ohm
667703 Handle
667701 Grid
657270 EWT(TM) Elliptical Horn
657268 Box
229036229036
229036229036
229036 1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver
227058227058
227058227058
227058 15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120965 M4i M5e x24mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-15 8 OhmAV-15 8 Ohm
AV-15 8 OhmAV-15 8 Ohm
AV-15 8 Ohm
727604 Inputs Panel Assembly AV-15/4 Ohm
778144 * Jack-Speakon Cables Assembly
141200 ** Speakon Socket (NL4MP Neutrik)
140193 ** Jack Mono Socket
768205768205
768205768205
768205 **
**
*Crossover Filter Board (Pcb#313065) AV-15/8 OhmCrossover Filter Board (Pcb#313065) AV-15/8 Ohm
Crossover Filter Board (Pcb#313065) AV-15/8 OhmCrossover Filter Board (Pcb#313065) AV-15/8 Ohm
Crossover Filter Board (Pcb#313065) AV-15/8 Ohm
667695 * Rear Panel AV-15/8 Ohm
667703 Handle
667701 Grid
657270 EWT(TM) Elliptical Horn
657268 Box
229036229036
229036229036
229036 1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver
227059227059
227059227059
227059 15" 8ohm Woofer Speaker15" 8ohm Woofer Speaker
15" 8ohm Woofer Speaker15" 8ohm Woofer Speaker
15" 8ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120965 M4i M5e x24mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-15S 4 OhmAV-15S 4 Ohm
AV-15S 4 OhmAV-15S 4 Ohm
AV-15S 4 Ohm
841208 Cables Assembly
727605 Inputs Panel Assembly AV-15S/4 Ohm
778144 * Jack-Speakon Cables Assembly
141200 ** Speakon Socket (NL4MP Neutrik)
140193 ** Jack Mono Socket
768206768206
768206768206
768206 **
**
*Crossover Filter Board (Pcb#313064) AV-15S/4 OhmCrossover Filter Board (Pcb#313064) AV-15S/4 Ohm
Crossover Filter Board (Pcb#313064) AV-15S/4 OhmCrossover Filter Board (Pcb#313064) AV-15S/4 Ohm
Crossover Filter Board (Pcb#313064) AV-15S/4 Ohm
667696 * Rear Panel AV-15S/4 Ohm
667703 Handle
667701 Grid
657269 Box
347393 Threaded Clog (to steady on the floor)
227060227060
227060227060
227060 15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
177721 Fixing Plate (to fix the Floor Bracket)
120965 M4i M5e x24mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
667704 Floor Bracket with Threaded Knobs
Note:Note:
Note:Note:
Note:
Each spare part is single quantity unless otherwise specified.
Asterisk prefix explanation:
Omitted = First level spare part.
One asterisk = Second level, part of previous listed first level part.
Two asterisk = Third level, part of previous listed second level part.
Three asterisk = ............
Any request for not above mentioned part must encompass specific description including:
1) Model name,
2) Section name,
3) Module code,
4) Reference name,
5) Quantity number.

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TEST PROCEDURES & ADJUSTMENTSTEST PROCEDURES & ADJUSTMENTS
TEST PROCEDURES & ADJUSTMENTSTEST PROCEDURES & ADJUSTMENTS
TEST PROCEDURES & ADJUSTMENTS
These procedures are relative to the ACTIVE versions (amplified loudspeakers)
only.
PrecautionPrecaution
PrecautionPrecaution
Precaution
➭To prevent short circuit during any test, the oscilloscope must be EARTHthe oscilloscope must be EARTH
the oscilloscope must be EARTHthe oscilloscope must be EARTH
the oscilloscope must be EARTH
insulatedinsulated
insulatedinsulated
insulated, this occurs because some test require to connect its probe to the
amplifier output, non-compliance may cause damages to oscilloscope inputs
circuitry.
➭Before removing or installing any modules and connectors, disconnect thedisconnect the
disconnect thedisconnect the
disconnect the
amplifier from AC MAINSamplifier from AC MAINS
amplifier from AC MAINSamplifier from AC MAINS
amplifier from AC MAINS and measure the DC supply voltages across each
of the power suppliy capacitors. If your measurement on any of the caps is
greater than 10Vdc, connect a 100Ω10W resistor across the applicable caps
to discharge them for your safety. Remember to remove the discharge
resistor immediately after discharging caps. Do not power up the amplifierDo not power up the amplifier
Do not power up the amplifierDo not power up the amplifier
Do not power up the amplifier
with the discharge resistor connectedwith the discharge resistor connected
with the discharge resistor connectedwith the discharge resistor connected
with the discharge resistor connected.
➭Read these notes entirely before proceeding to any operation. These notes
are not comprehensive of all damages that possibly occur, but includes some
specifically advices, checks and adjustments relative to this amplified speaker.
➭Do not check the amplifier with the speaker connected use only anDo not check the amplifier with the speaker connected use only an
Do not check the amplifier with the speaker connected use only anDo not check the amplifier with the speaker connected use only an
Do not check the amplifier with the speaker connected use only an
appropriate load resistor.appropriate load resistor.
appropriate load resistor.appropriate load resistor.
appropriate load resistor.
RemarksRemarks
RemarksRemarks
Remarks
➭The power supply utilizes a dual bipolar DC rail configuration with low and
high voltages; one positive and one negative low rail (+/-Vcc1) and one
positive and one negative high rail (+/-Vcc2).
Visual CheckVisual Check
Visual CheckVisual Check
Visual Check
➭Check the speakers for any damaging (cone-breaking, interruption or so).
➭Before proceed to supply the amplifier check visually the internal assembly,
if appears an evident damage find the most possible reasons that cause it.
➭Check the wiring cables for possible interruptions or shorts.
➭If the damage has burnt a printed circuit board don’t try to repair it, replace
with a new one.
Test InstrumentsTest Instruments
Test InstrumentsTest Instruments
Test Instruments
➭Audio Generator
➭Dual Trace Oscilloscope
➭Digital Multimeter
➭Temperature Meter
➭4Ω500W, 100Ω10W resistors
➭Variac (0÷250Vac)
AV12A Amplified LoudspeakerAV12A Amplified Loudspeaker
AV12A Amplified LoudspeakerAV12A Amplified Loudspeaker
AV12A Amplified Loudspeaker
The following adjustment and notes are relative to this model only.
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Dimensions: (WxHxD) 436x616x420mm
Weight: 28,5Kg
Power Requirements: (230Vac±10% 50Hz) 210VA
(115Vac±10% 50/60Hz) 210VA
Output Power*: (4Ω) 200W
Max. Undistorted Out*: (4Ω) 80Vpp
Sensitivity: (1W/1m) 97dBSPL
Max SPL: (continuous) 120dBSPL
(peak) 123dBSPL
Frequency Response (amplifier+speaker) 70Hz÷20kHz
(only amplifier -3dB) 10Hz÷60kHz
Input Sensitivity: (0dB) 0.775VRMS
Input Impedance: (balanced) 30KΩ
(unbalanced) 15KΩ
Voltage Gain: 31±1dB
IMD: (SMPTE 60Hz/7KHz 4:1) <0.1%
THD: (THD+N) <0.1%
S/N Ratio: (unweighted) >100dB
*Note: measured with the limiter deactivated.
SetupSetup
SetupSetup
Setup
➭Connect the Variac between the mains and the amplifier and set it at zero
voltage.
➭Turn full clockwise the LEVEL potentiometer.
➭Connect the audio generator to the channel input and set it to 1kHz 775mVRMS
(0dB) sinusoidal signal.
➭Place the temperature sensor between heatsink and the PTC (R59).
➭The procedures that follow must be executed subsequently in the order
specified.
Supply CheckSupply Check
Supply CheckSupply Check
Supply Check
➭Remove the transformer secondary fuses (located on SUPPLY board), set
the Variac to the nominal mains voltage, check with the Multimeter the AC
supply voltages:
F1-F2=76±2Vac
F3-F4=42±1.5Vac.
➭Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back
on its holders.
➭Connect the oscilloscope probe CH1 to the channel output, before RL1, set
it to 20V/div. 1mS/div.
➭Set up the Variac slowly monitoring the Outputs with the oscilloscope CH1
connected, it should display the sinusoidal input signal amplified with no
distortions, if a distortion occur check the AMPLIFIER board as suggested in
the ADVICES section.
➭If the protection trips, turn off the amplifier, wait some minutes and disconnect
the supplies from the amplifier module (CN2, CN3 on AMPLIFIER board),
continue to check the supplies.
➭Finally verify the DC supplies on SUPPLY board:
CN2 pin 5 (+Vcc2) =+54±2Vdc
CN3 pin 1 (+Vcc1) =+29±1.5Vdc
CN3 pin 5-6 (-Vcc1) =-29±1.5Vdc
CN3 pin 4 (-Vcc2) =-54±2Vdc
CN2 pin 3 =+15±1Vdc
CN2 pin 2 =-15±1Vdc
➭If one or more voltages don’t correspond, check the rectifiers, capacitors and
transformers disconnecting them from circuitry, refer to schematics.
Channels CheckChannels Check
Channels CheckChannels Check
Channels Check
➭Verify, with the Multimeter, the insulation between the heatsink and the
transistors collectors.
➭Verify, with the Multimeter, the PTC resistor value (R59), it must be between
50Ωand 200Ω.
➭SETUP:SETUP:
SETUP:SETUP:
SETUP:
Connect the CH1 scope GND clip to CN2 pin 6 (SGND terminal).
Connect the CH1 probe tip to CN3 pin 2 or 3 (PWR out).
Connect the CH2 probe tip to D20 anode and set its sensitivity at 5V/div.
Set the LEVEL potentiometer full clockwise.
The load resistor is disconnected.
➭INITIAL TEST:INITIAL TEST:
INITIAL TEST:INITIAL TEST:
INITIAL TEST:
Increase slowly the Variac. The channel output signals must be symmetrical
respect the GND without visible distortion and oscillation as shown in Fig.1
Trace A ( Trace B shown the amplifier 2nd stage input). If there is a distortion
read the section ADVICES.
➭HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:
Connect the CH2 probe tip to D25 cathode and set its sensitivity at 20V/div.
When the output signal (Positive half-wave) is less than 22Vp the voltage on
D25 cathode must remain constant at 28V, when the output signal exceeds
22Vp the voltage must follow the output signal with 6V offset (see Fig.2 Trace
B ), to check the negative high rail connect the probe to D26 anode (see Fig.2
Trace C ).
➭Connect the 4Ω500W load on the output and repeat the INITIAL and HIGH
RAIL checks.
➭GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:
Set the generator level at -10dB (0,245VRMS), adjust the trimmer VR2 on
INPUTS board to obtain an output level of 14.5Vp (10VRMS).
➭Re-set the generator level at 0dB (0,775VRMS),
➭SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:
Set the LEVEL pot to minimum, set the scope timebase at 1V/div. 1mS/div.,
then increase the level and check the SIGNAL/COMP led activity: it must turn
on (green light) when the amplifier output is higher than 1Vp.
Set the scope at 20V/div. and increase the level, check the led: it must change
from green to red colour when the amplifier output signal is 36±2Vp, increas-
ing the input level the output signal must keep the same level, this is due to
the limiter-compression circuitry (IC2, DL1, IC1).
➭BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:
With resistive load connected wait until the temperature reach 50°c.
Set the generator level at zero, connect the Multimeter across the resistors
R60, then adjust VR1 trimmer to read 13±0.5mVdc.
➭BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:
Switch alternatively the generator frequency to 100Hz and 10kHz, no level
changes must be detectable respect 1kHz.
➭OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:
Set the Variac to zero voltage output, disconnect resistive load from the
amplifier output, connect temporarily (by means of a suitable conductor wire)
CN2 pin 3 (+15Vdc) to R72 side RL1, the protection circuitry (TR14,15,16)
detect the DC voltage and open the output relay (RL1) within 3 seconds
approx.
Remove the connection, wait until the relay switch on and after some seconds
repeat the check with -15Vdc (available on CN2 pin 2), the protection circuitry
must open the relay again.
➭SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:

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Disconnect the audio generator and short the input (pin 1,2,3 of XLR socket
shorted) the output signal (noise) must be less than 1mV.
AV15A Amplified LoudspeakerAV15A Amplified Loudspeaker
AV15A Amplified LoudspeakerAV15A Amplified Loudspeaker
AV15A Amplified Loudspeaker
The following adjustment and notes are relative to this model only.
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Dimensions: (WxHxD) 500x706x490mm
Weight: 26Kg
Power Requirements: (230Vac±10% 50Hz) 370VA
(115Vac±10% 50/60Hz) 370VA
Output Power*: (4Ω) 350W
Max. Undistorted Out*: (4Ω) 105Vpp
Sensitivity: (1W/1m) 99dBSPL
Max SPL: (continuous) 124dBSPL
(peak) 127dBSPL
Frequency Response (amplifier+speaker) 60Hz÷20kHz
(only amplifier -3dB) 10Hz÷60kHz
Input Sensitivity: (0dB) 0.775VRMS
Input Impedance: (balanced) 30KΩ
(unbalanced) 15KΩ
Voltage Gain: 33±1dB
IMD: (SMPTE 60Hz/7KHz 4:1) <0.1%
THD: (THD+N) <0.1%
S/N Ratio: (unweighted) >100dB
*Note: measured with the limiter deactivated.
SetupSetup
SetupSetup
Setup
➭Connect the Variac between the mains and the amplifier and set it at zero
voltage.
➭Turn full clockwise the LEVEL potentiometer.
➭Connect the audio generator to the channel R input and set it to 150Hz
775mVRMS (0dB) sinusoidal signal.
➭Place the temperature sensor between heatsink and the PTC (R59).
➭The procedures that follow must be executed subsequently in the order
specified.
Supply CheckSupply Check
Supply CheckSupply Check
Supply Check
➭Remove the transformer secondary fuses (located on SUPPLY board), set
the Variac to the nominal mains voltage, check with the Multimeter the AC
supply voltages:
F1-F2=102±2Vac
F3-F4=60±1.5Vac.
➭Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back
on its holders.
➭Connect the oscilloscope probe CH1 to the channel output, before RL1, set
it to 20V/div. 1mS/div.
➭Set up the Variac slowly monitoring the Outputs with the oscilloscope CH1
connected, it should display the sinusoidal input signal amplified with no
distortions, if a distortion occur check the AMPLIFIER board as suggested in
the ADVICES section.
➭If the protection trips, turn off the amplifier, wait some minutes and disconnect
the supplies from the amplifier module (CN2, CN3 on AMPLIFIER board),
continue to check the supplies.
➭Finally verify the DC supplies on SUPPLY board:
CN2 pin 5 (+Vcc2) =+71±2Vdc
CN3 pin 1 (+Vcc1) =+42±1.5Vdc
CN3 pin 5-6 (-Vcc1) =-42±1.5Vdc
CN3 pin 4 (-Vcc2) =-71±2Vdc
CN2 pin 3 =+15±1Vdc
CN2 pin 2 =-15±1Vdc
➭If one or more voltages don’t correspond, check the rectifiers, capacitors and
transformers disconnecting them from circuitry, refer to schematics.
Channels CheckChannels Check
Channels CheckChannels Check
Channels Check
➭Verify, with the Multimeter, the insulation between the heatsink and the
transistors collectors.
➭Verify, with the Multimeter, the PTC resistor value (R59), it must be between
50Ωand 200Ω.
➭SETUP:SETUP:
SETUP:SETUP:
SETUP:
Connect the CH1 scope GND clip to CN2 pin 6 (SGND terminal).
Connect the CH1 probe tip to CN3 pin 2 or 3 (PWR out).
Connect the CH2 probe tip to D20 anode and set its sensitivity at 5V/div.
Set the LEVEL potentiometer full clockwise.
The load resistor is disconnected.
➭INITIAL TEST:INITIAL TEST:
INITIAL TEST:INITIAL TEST:
INITIAL TEST:
Increase slowly the Variac. The channel output signals must be symmetrical
respect the GND without visible distortion and oscillation as shown in Fig.1
Trace A ( Trace B shown the amplifier 2nd stage input). If there is a distortion
read the section ADVICES.
➭HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:
Connect the CH2 probe tip to D25 cathode and set its sensitivity at 20V/div.
When the output signal (Positive half-wave) is less than 34Vp the voltage on
D25 cathode must remain constant at 40V, when the output signal exceeds
40Vp the voltage must follow the output signal with 6V offset (see Fig.2 Trace
B ), to check the negative high rail connect the probe to D26 anode (see Fig.2
Trace C ).
➭Connect the 4Ω500W load on the output and repeat the INITIAL and HIGH
RAIL checks.
➭GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:
Set the generator level at -10dB (0,245VRMS), adjust the trimmer VR2 on
INPUTS board to obtain an output level of 19Vp (13.4VRMS).
➭Re-set the generator level at 0dB (0,775VRMS),
➭SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:
Set the LEVEL pot to minimum, set the scope timebase at 1V/div. 1mS/div.,
then increase the level and check the SIGNAL/COMP led activity: it must turn
on (green light) when the amplifier output is higher than 1Vp.
Set the scope at 20V/div. and increase the level, check the led: it must change
from green to red colour when the amplifier output signal is 50±2Vp,
increasing the input level the output signal must keep the same level, this is
due to the limiter-compression circuitry (IC2, DL1, IC1).
➭BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:
With the load connected wait until the temperature reach 50°c.
Set the generator level at zero, connect the Multimeter across the resistors
R60, then adjust VR1 trimmer to read 15±0.5mVdc.
➭BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:
Switch alternatively the generator frequency to 100Hz and 10kHz, no level
changes must be detectable respect 1kHz.
➭OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:
Set the Variac to zero voltage output, disconnect resistive load from the
amplifier output, connect temporarily (by means of a suitable conductor wire)
CN2 pin 3 (+15Vdc) to R72 side RL1, the protection circuitry (TR14,15,16)
detect the DC voltage and open the output relay (RL1) within 3 seconds
approx.
Remove the connection, wait until the relay switch on and after some seconds
repeat the check with -15Vdc (available on CN2 pin 2), the protection circuitry
must open the relay again.
➭SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:
Disconnect the audio generator and short the input (pin 1,2,3 of XLR socket
shorted) the output signal (noise) must be less than 1mV.
AV15SA Amplified SubwooferAV15SA Amplified Subwoofer
AV15SA Amplified SubwooferAV15SA Amplified Subwoofer
AV15SA Amplified Subwoofer
The following adjustment and notes are relative to this model only.
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONSTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Dimensions: (WxHxD) 500x706x490mm
Weight: 24,5Kg
Power Requirements: (230Vac±10% 50Hz) 370VA
(115Vac±10% 50/60Hz) 370VA
Output Power*: (4Ω) 350W
Max. Undistorted Out*: (4Ω) 105Vpp
Sensitivity: (1W/1m) 97dBSPL
Max SPL: (continuous) 122dBSPL
(peak) 125dBSPL
Frequency Response (filter+amplifier+speaker) 50Hz÷320Hz
(only amplifier -3dB) 10Hz÷60KHz
Input Sensitivity: (0dB) 0.775VRMS
Input Impedance: (balanced) 30KΩ
(unbalanced) 15KΩ
Voltage Gain: (@150Hz) 33±1dB
IMD: (SMPTE 60Hz/7KHz 4:1) <0.1%
THD: (THD+N) <0.1%
S/N Ratio: (unweighted) >100dB
SetupSetup
SetupSetup
Setup
➭Connect the Variac between the mains and the amplifier and set it at zero
voltage.
➭Turn full clockwise the LEVEL and X-OVER potentiometers.
➭Connect the audio generator to the channel R input and set it to 150Hz
775mVRMS (0dB) sinusoidal signal.
➭Place the temperature sensor between heatsink and the PTC (R59).
➭The procedures that follow must be executed subsequently in the order
specified.

JJ
JJ
J 66
66
6
Supply CheckSupply Check
Supply CheckSupply Check
Supply Check
➭Remove the transformer secondary fuses (located on SUPPLY board), set
the Variac to the nominal mains voltage, check with the Multimeter the AC
supply voltages:
F1-F2=102±2Vac
F3-F4=60±1.5Vac.
➭Re-set the Variac at zero voltage, turn off the amplifier and put the fuses back
on its holders.
➭Connect the oscilloscope probe CH1 to the channel output, before RL1, set
it to 20V/div. 1mS/div.
➭Set up the Variac slowly monitoring the Outputs with the oscilloscope CH1
connected, it should display the sinusoidal input signal amplified with no
distortions, if a distortion occur check the AMPLIFIER board as suggested in
the ADVICES section.
➭If the protection trips, turn off the amplifier, wait some minutes and disconnect
the supplies from the amplifier module (CN2, CN3 on AMPLIFIER board),
continue to check the supplies.
➭Finally verify the DC supplies on SUPPLY board:
CN2 pin 5 (+Vcc2) =+71±2Vdc
CN3 pin 1 (+Vcc1) =+42±1.5Vdc
CN3 pin 5-6 (-Vcc1) =-42±1.5Vdc
CN3 pin 4 (-Vcc2) =-71±2Vdc
CN2 pin 3 =+15±1Vdc
CN2 pin 2 =-15±1Vdc
➭If one or more voltages don’t correspond, check the rectifiers, capacitors and
transformers disconnecting them from circuitry, refer to schematics.
Channels CheckChannels Check
Channels CheckChannels Check
Channels Check
➭Verify, with the Multimeter, the insulation between the heatsink and the
transistors collectors.
➭Verify, with the Multimeter, the PTC resistor value (R59), it must be between
50Ωand 200Ω.
➭SETUP:SETUP:
SETUP:SETUP:
SETUP:
Connect the CH1 scope GND clip to CN2 pin 6 (SGND terminal).
Connect the CH1 probe tip to CN3 pin 2 or 3 (PWR out).
Connect the CH2 probe tip to D20 anode and set its sensitivity at 5V/div.
Set the LEVEL potentiometer full clockwise.
The load resistor is disconnected.
➭INITIAL TEST:INITIAL TEST:
INITIAL TEST:INITIAL TEST:
INITIAL TEST:
Increase slowly the Variac. The channel output signals must be symmetrical
respect the GND without visible distortion and oscillation as shown in Fig.1
Trace A ( Trace B shown the amplifier 2nd stage input). If there is a distortion
read the section ADVICES.
➭HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:HIGH RAIL CHECK:
HIGH RAIL CHECK:
Connect the CH2 probe tip to D25 cathode and set its sensitivity at 20V/div.
When the output signal (Positive half-wave) is less than 34Vp the voltage on
D25 cathode must remain constant at 40V, when the output signal exceeds
40Vp the voltage must follow the output signal with 6V offset (see Fig.2 Trace
B ), to check the negative high rail connect the probe to D26 anode (see Fig.2
Trace C ).
➭Connect the 4Ω500W load on the output and repeat the INITIAL and HIGH
RAIL checks.
➭GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:GAIN ADJUSTMENT:
GAIN ADJUSTMENT:
Set the generator level at -10dB (0,245VRMS), adjust the trimmer VR1 on
CONTROLS & CROSSOVER board to obtain an output level of 19Vp
(13.4VRMS).
➭Re-set the generator level at 0dB (0,775VRMS),
➭SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:SIGN/COMP SENSOR CHECK:
SIGN/COMP SENSOR CHECK:
Set the LEVEL pot to minimum, set the scope timebase at 1V/div. 1mS/div.,
then increase the level and check the SIGNAL/COMP led activity: it must turn
on (green light) when the amplifier output is higher than 1Vp.
Set the scope at 20V/div. and increase the level, check the led: it must change
from green to red colour when the amplifier output signal is 50±2Vp, increas-
ing the input level the output signal must keep the same level, this is due to
the limiter-compression circuitry (IC2, DL1, IC1).
➭BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:BIAS ADJUSTMENT:
BIAS ADJUSTMENT:
With the load connected wait until the temperature reach 50°c.
Set the generator level at zero, connect the Multimeter across the resistors
R60, then adjust VR1 trimmer to read 15±0.5mVdc.
➭BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:BANDWIDTH CHECK:
BANDWIDTH CHECK:
The bandwidth of the amplifier board only is linear within the audio range
(20Hz-20kHz), but in this case is limited by the X-OVER circuitry on CON-
TROLS & CROSSOVER board.
Figure 3 and 4 show the LowPass and the HighPass response, check the
correspondance with it for some frequency values (50,100,150,300 for
example).
➭OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:OFFSET SENSOR CHECK:
OFFSET SENSOR CHECK:
Set the Variac to zero voltage output, disconnect resistive load from the
amplifier output, connect temporarily (by means of a suitable conductor wire)
CN2 pin 3 (+15Vdc) to R72 side RL1, the protection circuitry (TR14,15,16)
detect the DC voltage and open the output relay (RL1) within 3 seconds
approx.
Remove the connection, wait until the relay switch on and after some seconds
repeat the check with -15Vdc (available on CN2 pin 2), the protection circuitry
must open the relay again.
➭SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:SIGNAL TO NOISE RATIO CHECK:
SIGNAL TO NOISE RATIO CHECK:
Disconnect the audio generator and short the input (pin 1,2,3 of XLR socket
shorted) the output signal (noise) must be less than 1mV.
AdvicesAdvices
AdvicesAdvices
Advices
➭Check the channels one at time to determine which is right (note: if you have
a spare amplifier module that you know as right, use it).
➭If you have determinate that the problem is a short on a rail, you must check
the output transistors to determine which transistor devices are bad.
Use a soldering iron to lift one leg of each emitter pin and measure the emitter-
collector resistance on each device.
Unsolder and lift one leg of each base pin and check the base-collector
resistance of each transistor and replace any that measure as a short.
If all the transistors are OK, unsolder and lift one leg of each diode and check
them.
Check the circuit board for open foil traces.
Use the Multimeter as Ohm-meter to check the resistors, particularly the base
and emitter resistors of damaged transistor.
➭If the input sinewave appears to be distorted during the negative cycle, you
can assume that the problem is located somewhere in the circuitry of the
positive low rail.
If the positive cycle appears distorted, you can assume that the problem is in
the circuitry of the negative low rail.
➭If the high rails appear distorted or are not modulating as shown in figure, then
the problem probably exists somewhere in the circuitry of the respective (+
or -) defective high rail. Refer to the schematics.
FiguresFigures
FiguresFigures
Figures
Figure 1 and 2 show the right shape of the traces but not their real levels, refer
to the levels mentioned in the chapter of appropriate amplified loudspeaker.
Figure 3 and 4 show the frequency response of the AV15SA crossover.
Fig. 2Fig. 2
Fig. 2Fig. 2
Fig. 2
Trace B
Trace A
Trace C
Fig. 1Fig. 1
Fig. 1Fig. 1
Fig. 1 Trace A
Trace B
Fig. 3Fig. 3
Fig. 3Fig. 3
Fig. 3
X-OVER at max.
X-OVER at min.
Fig. 4Fig. 4
Fig. 4Fig. 4
Fig. 4
X-OVER at max.
X-OVER at min.

77
77
7 JJ
JJ
J

JJ
JJ
J 88
88
8

99
99
9 JJ
JJ
J

JJ
JJ
J 1010
1010
10
Spare Part List (ACTIVE VERSIONS)Spare Part List (ACTIVE VERSIONS)
Spare Part List (ACTIVE VERSIONS)Spare Part List (ACTIVE VERSIONS)
Spare Part List (ACTIVE VERSIONS)
Code Description
AccessoriesAccessories
AccessoriesAccessories
Accessories
277334 Owner’s Manual
130274 Mains Cable (EU)
130276 Mains Cable (US)
AV-12AAV-12A
AV-12AAV-12A
AV-12A
Amplifier AssemblyAmplifier Assembly
Amplifier AssemblyAmplifier Assembly
Amplifier Assembly
737103737103
737103737103
737103 200W Amplifier Module (EU)200W Amplifier Module (EU)
200W Amplifier Module (EU)200W Amplifier Module (EU)
200W Amplifier Module (EU)
737104737104
737104737104
737104 200W Amplifier Module (US)200W Amplifier Module (US)
200W Amplifier Module (US)200W Amplifier Module (US)
200W Amplifier Module (US)
778146 * Amplifier Cables Assembly
768211768211
768211768211
768211 **
**
*200W Supply Board (Pcb#313061)200W Supply Board (Pcb#313061)
200W Supply Board (Pcb#313061)200W Supply Board (Pcb#313061)
200W Supply Board (Pcb#313061)
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
140081 ** H 2c P=10 Terminal Block
140069 ** H 3c P=10mm Terminal Block
110119 ** Fuse Clip 10A max (EU) (US)
100060 ** 7815 +15V 1A Voltage Regulator
100049 ** 7915 -15V 1A Voltage Regulator
080605 ** KBL02 4A 200V Rectifier Diode Bridge
080156 ** 1N4002 1A 100V Rectifier Diode
030560 ** 4700u 80v 20% Snap-In Electrolytic Capacitor
030526 ** 2200u 35v 20% Snap-In Electrolytic Capacitor
020250 ** 10n 400V 10% MKT Polyester Capacitor
768207768207
768207768207
768207 **
**
*Inputs Board (Pcb#313058)Inputs Board (Pcb#313058)
Inputs Board (Pcb#313058)Inputs Board (Pcb#313058)
Inputs Board (Pcb#313058)
141189 ** Hor Female XLR-Jack Socket (NCJ6FK-H Neutrik)
141186 ** Hor Male XLR Socket (NC3MAH Neutrik)
140929 ** 9 Contacts Vert Male Connector
120857 ** Vertical Male Faston 6.3mm
110267 ** 1sw 2pos Horizontal Slider Switch
100061 ** TL072 Dual J-Fet Operational Amplifier
080743 ** 3mm Wide Diffused Green Led
080742 ** Led 3mm Wide Diffused Red-Grn
080293 ** 15V 1W 5% Zener Diode
074570 ** 5K 31steps Linear Potentiometer
070245 ** 100K 20% Vertical Linear Trimmer
042706 ** 80K6 1/4W 1% Metalized Film Resistor
042630 ** 17K4 1/4W 1% Metalized Film Resistor
042625 ** 15K0 1/4W 1% Metalized Film Resistor
020250 ** 10n 400V 10% MKT Polyester Capacitor
727606727606
727606727606
727606 **
**
*200W Amplifier Board (Pcb#319064)200W Amplifier Board (Pcb#319064)
200W Amplifier Board (Pcb#319064)200W Amplifier Board (Pcb#319064)
200W Amplifier Board (Pcb#319064)
768214 ** 200W Amplifier Board (Pcb#319064) without Power Transistors
141102 *** 6 Contacts Vert Male Connector
140929 *** 9 Contacts Vert Male Connector
110316 *** Relay 24V / 1 Switch no 16A 250V
100904 *** LM393 Dual Comparator
100061 *** TL072 Dual J-Fet Operational Amplifier
090917 *** MJE350 TO126 Pnp Transistor
090916 *** MJE340 TO126 Npn Transistor
090201 *** 2N5401 TO92 Pnp Transistor
090200 *** 2N5550 TO92 Npn Transistor
090194 *** BC560 TO92 LN Pnp Transistor
090183 *** BC550 TO92 LN Npn Transistor
090153 *** BC327 TO92 Pnp Transistor
080901 *** VTL5C4 Analog Optoisolator
080245 *** 7V5 1W 5% Zener Diode
080171 *** FE6B 6A 100V Fast Recovery Diode
080156 *** 1N4002 1A 100V Rectifier Diode
080103 *** 1N4148 100mA 75V Signal Diode
070105 *** 470E 20% Vertical Linear Trimmer
060591 *** 8K2 2W 10% Resistor
060051 *** 0E22 5W 5% Wire Resistor
042695 *** 56K2 1/4W 1% Metalized Film Resistor
042685 *** 47K5 1/4W 1% Metalized Film Resistor
042605 *** 10K0 1/4W 1% Metalized Film Resistor
030715 *** 1000u 6v3 20% Vert Electrolytic Capacitor
340154 ** TO3/TO218 Mica Washer
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
090920 ** MJE802 TO126 Npn Darl Transistor
090919 ** MJE15031 TO220 Pnp Transistor
090918 ** MJE15030 TO220 Npn Transistor
090913 ** MJE4352 TO218 Pnp Transistor
090912 ** MJE4342 TO218 Npn Transistor
090863 ** TIP36C TO218 Pnp Transistor
090862 ** TIP35C TO218 Npn Transistor
080821 ** Ptc 90 PTH59F04BE222TS
667697 * Rear Panel
237077237077
237077237077
237077 **
**
*Transformer 230Vac 200W (EU)Transformer 230Vac 200W (EU)
Transformer 230Vac 200W (EU)Transformer 230Vac 200W (EU)
Transformer 230Vac 200W (EU)
237078237078
237078237078
237078 **
**
*Transformer 115Vac 200W (US)Transformer 115Vac 200W (US)
Transformer 115Vac 200W (US)Transformer 115Vac 200W (US)
Transformer 115Vac 200W (US)
210215 * Adhesive Rubber Foam 10x1.9mm (Specify mt)
210212 * Slider Switch Adhesive Gasket
110614 * Mains Socket
110291 * Power Switch
110029 * T4A Fuse 5x20mm (EU)
110014 * T2.5A Fuse 5x20mm (EU)
110036 * T4A Fuse 6.3x32mm (US)
110035 * T2.5A Fuse 6.3x32mm (US)
080607 * KBPC25 25A 200V Rectifier Diode Bridge
020491 * 100nF 10% 250Vac Polyester Capacitor
Box AssemblyBox Assembly
Box AssemblyBox Assembly
Box Assembly
778112 Cables Assembly
768202768202
768202768202
768202 Crossover Filter Board (Pcb#313063) AV-12/4 OhmCrossover Filter Board (Pcb#313063) AV-12/4 Ohm
Crossover Filter Board (Pcb#313063) AV-12/4 OhmCrossover Filter Board (Pcb#313063) AV-12/4 Ohm
Crossover Filter Board (Pcb#313063) AV-12/4 Ohm
667702 Handle
667700 Grid
659027 White Pot Knob
657271 Box
657270 EWT(TM) Elliptical Horn
229037229037
229037229037
229037 1" 4ohm Horn Tweeter1" 4ohm Horn Tweeter
1" 4ohm Horn Tweeter1" 4ohm Horn Tweeter
1" 4ohm Horn Tweeter
227056227056
227056227056
227056 12" 4ohm Woofer Speaker12" 4ohm Woofer Speaker
12" 4ohm Woofer Speaker12" 4ohm Woofer Speaker
12" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120964 M4i M5e x17.5mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-15AAV-15A
AV-15AAV-15A
AV-15A
Amplifier AssemblyAmplifier Assembly
Amplifier AssemblyAmplifier Assembly
Amplifier Assembly
737105737105
737105737105
737105 350W Amplifier Module (EU)350W Amplifier Module (EU)
350W Amplifier Module (EU)350W Amplifier Module (EU)
350W Amplifier Module (EU)
737106737106
737106737106
737106 350W Amplifier Module (US)350W Amplifier Module (US)
350W Amplifier Module (US)350W Amplifier Module (US)
350W Amplifier Module (US)
778146 * Amplifier Cables Assembly
768212768212
768212768212
768212 **
**
*350W Supply Board (Pcb#313061)350W Supply Board (Pcb#313061)
350W Supply Board (Pcb#313061)350W Supply Board (Pcb#313061)
350W Supply Board (Pcb#313061)
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
140081 ** H 2c P=10 Terminal Block
140069 ** H 3c P=10mm Terminal Block
110119 ** Fuse Clip 10A max (EU) (US)
100060 ** 7815 +15V 1A Voltage Regulator
100049 ** 7915 -15V 1A Voltage Regulator
080606 ** GBU8D 8A Rectifier Diodes Bridge
080293 ** 15V 1W 5% Zener Diode
080156 ** 1N4002 1A 100V Rectifier Diode
060403 ** 180E 3W 10% Resistor
030560 ** 4700u 80v 20% Snap-In Electrolytic Capacitor
030555 ** 4700u 50V 20% Snap-In Electrolytic Capacitor
768208768208
768208768208
768208 **
**
*Inputs Board (Pcb#313058)Inputs Board (Pcb#313058)
Inputs Board (Pcb#313058)Inputs Board (Pcb#313058)
Inputs Board (Pcb#313058)
141189 ** Hor Female XLR-Jack Socket (NCJ6FK-H Neutrik)
141186 ** Hor Male XLR Socket (NC3MAH Neutrik)
140929 ** 9 Contacts Vert Male Connector
120857 ** Vertical Male Faston 6.3mm
110267 ** 1sw 2pos Horizontal Slider Switch
100061 ** TL072 Dual J-Fet Operational Amplifier
080743 ** 3mm Wide Diffused Green Led
080742 ** Led 3mm Wide Diffused Red-Grn
080293 ** 15V 1W 5% Zener Diode
074570 ** 5K 31steps Linear Potentiometer
070245 ** 100K 20% Vertical Linear Trimmer
042715 ** 82K5 1/4W 1% Metalized Film Resistor
042630 ** 17K4 1/4W 1% Metalized Film Resistor
042625 ** 15K0 1/4W 1% Metalized Film Resistor
727607727607
727607727607
727607 **
**
*350W Amplifier Board (Pcb#319064)350W Amplifier Board (Pcb#319064)
350W Amplifier Board (Pcb#319064)350W Amplifier Board (Pcb#319064)
350W Amplifier Board (Pcb#319064)
768215 ** 350W Amplifier Board (Pcb#319064) without Power Transistors
141102 *** 6 Contacts Vert Male Connector
140929 *** 9 Contacts Vert Male Connector
110316 *** Relay 24V / 1 Switch no 16A 250V
100904 *** LM393 Dual Comparator
100061 *** TL072 Dual J-Fet Operational Amplifier
090917 *** MJE350 TO126 Pnp Transistor
090916 *** MJE340 TO126 Npn Transistor
090201 *** 2N5401 TO92 Pnp Transistor
090200 *** 2N5550 TO92 Npn Transistor
090194 *** BC560 TO92 LN Pnp Transistor
090183 *** BC550 TO92 LN Npn Transistor
090153 *** BC327 TO92 Pnp Transistor
080901 *** VTL5C4 Analog Optoisolator
080245 *** 7V5 1W 5% Zener Diode
080171 *** FE6B 6A 100V Fast Recovery Diode
080156 *** 1N4002 1A 100V Rectifier Diode
080103 *** 1N4148 100mA 75V Signal Diode
070105 *** 470E 20% Vertical Linear Trimmer
060591 *** 8K2 2W 10% Resistor
060051 *** 0E22 5W 5% Wire Resistor
042695 *** 56K2 1/4W 1% Metalized Film Resistor
042687 *** 49K9 1/4W 1% Metalized Film Resistor
042605 *** 10K0 1/4W 1% Metalized Film Resistor
030715 *** 1000u 6v3 20% Vert Electrolytic Capacitor
340783 ** TO264 Mica Washer
340154 ** TO3/TO218 Mica Washer
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
090924 ** MJL21194 TO264 Npn Transistor
090923 ** MJL21193 TO264 Pnp Transistor
090920 ** MJE802 TO126 Npn Darl Transistor
090919 ** MJE15031 TO220 Pnp Transistor
090918 ** MJE15030 TO220 Npn Transistor
090863 ** TIP36C TO218 Pnp Transistor
090862 ** TIP35C TO218 Npn Transistor
080821 ** Ptc 90 PTH59F04BE222TS
667698 * Rear Panel
237068237068
237068237068
237068 **
**
*Transformer 230Vac 350W (EU)Transformer 230Vac 350W (EU)
Transformer 230Vac 350W (EU)Transformer 230Vac 350W (EU)
Transformer 230Vac 350W (EU)
237069237069
237069237069
237069 **
**
*Transformer 115Vac 350W (US)Transformer 115Vac 350W (US)
Transformer 115Vac 350W (US)Transformer 115Vac 350W (US)
Transformer 115Vac 350W (US)
210215 * Adhesive Rubber Foam 10x1.9mm (Specify mt)
210212 * Slider Switch Adhesive Gasket
110614 * Mains Socket
110291 * Power Switch
110029 * T4A Fuse 5x20mm (EU)
110018 * T6.3A Fuse 5x20mm (EU)
110037 * T6.3A Fuse 6.3x32mm (US)
110036 * T4A Fuse 6.3x32mm (US)
080607 * KBPC25 25A 200V Rectifier Diode Bridge
020491 * 100nF 10% 250Vac Polyester Capacitor
Box AssemblyBox Assembly
Box AssemblyBox Assembly
Box Assembly
778112 Cables Assembly
768204768204
768204768204
768204 Crossover Filter Board (Pcb#313062) AV-15/4 OhmCrossover Filter Board (Pcb#313062) AV-15/4 Ohm
Crossover Filter Board (Pcb#313062) AV-15/4 OhmCrossover Filter Board (Pcb#313062) AV-15/4 Ohm
Crossover Filter Board (Pcb#313062) AV-15/4 Ohm
667703 Handle
667701 Grid
659027 White Pot Knob
657272 Box
657270 EWT(TM) Elliptical Horn
229036229036
229036229036
229036 1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver1" 8ohm Horn Compression Driver
1" 8ohm Horn Compression Driver
227058227058
227058227058
227058 15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
210211 Gasket between Tweeter and Horn
120965 M4i M5e x24mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
AV-15SAAV-15SA
AV-15SAAV-15SA
AV-15SA
Amplifier AssemblyAmplifier Assembly
Amplifier AssemblyAmplifier Assembly
Amplifier Assembly
737107737107
737107737107
737107 350W Amplifier Module (EU)350W Amplifier Module (EU)
350W Amplifier Module (EU)350W Amplifier Module (EU)
350W Amplifier Module (EU)
737108737108
737108737108
737108 350W Amplifier Module (US)350W Amplifier Module (US)
350W Amplifier Module (US)350W Amplifier Module (US)
350W Amplifier Module (US)
778147 * Amplifier Cables Assembly
768213768213
768213768213
768213 **
**
*350W Supply Board (Pcb#313061)350W Supply Board (Pcb#313061)
350W Supply Board (Pcb#313061)350W Supply Board (Pcb#313061)
350W Supply Board (Pcb#313061)
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
100060 ** 7815 +15V 1A Voltage Regulator
100049 ** 7915 -15V 1A Voltage Regulator
080606 ** GBU8D 8A Rectifier Diodes Bridge
080293 ** 15V 1W 5% Zener Diode
080156 ** 1N4002 1A 100V Rectifier Diode
060403 ** 180E 3W 10% Resistor
030884 ** 10000U 80V 20% Snap-In Electrolytic Capacitor
030555 ** 4700u 50V 20% Snap-In Electrolytic Capacitor
768210 * Controls & Crossover Board (Pcb#313060)
140929 ** 9 Contacts Vert Male Connector
140908 ** 6 Contacts Vert Male Small Connector
140873 ** 4 Contacts Vert Male Connector
110305 ** Relay 12V / 2 Switch 1A 250V
100919 ** MC33078 Dual LN Operational Amplifier
100084 ** TL074 Quad J-Fet Operational Amplifier
100061 ** TL072 Dual J-Fet Operational Amplifier
100019 ** TL071 LN J-Fet Operational Amplifier
080743 ** 3mm Wide Diffused Green Led
080742 ** Led 3mm Wide Diffused Red-Grn
080103 ** 1N4148 100mA 75V Signal Diode
075820 ** 4x100K 16mm Hor Rotary Alog Potentiometer
074570 ** 5K 31steps Linear Potentiometer
070241 ** 100K 20% Horizontal Linear Trimmer
042717 ** 88K7 1/4W 1% Metalized Film Resistor
042625 ** 15K0 1/4W 1% Metalized Film Resistor
042617 ** 13K0 1/4W 1% Metalized Film Resistor
042605 ** 10K0 1/4W 1% Metalized Film Resistor
042565 ** 4K99 1/4W 1% Metalized Film Resistor
042555 ** 4K22 1/4W 1% Metalized Film Resistor
768209768209
768209768209
768209 **
**
*Inputs Board (Pcb#313059)Inputs Board (Pcb#313059)
Inputs Board (Pcb#313059)Inputs Board (Pcb#313059)
Inputs Board (Pcb#313059)
141189 ** Hor Female XLR-Jack Socket (NCJ6FK-H Neutrik)
141186 ** Hor Male XLR Socket (NC3MAH Neutrik)
140935 ** 6 Contacts Hor Male Connector
140872 ** 4 Contatcs Hor Male Connector
110267 ** 1sw 2pos Horizontal Slider Switch
080293 ** 15V 1W 5% Zener Diode
727607727607
727607727607
727607 **
**
*350W Amplifier Board (Pcb#319064)350W Amplifier Board (Pcb#319064)
350W Amplifier Board (Pcb#319064)350W Amplifier Board (Pcb#319064)
350W Amplifier Board (Pcb#319064)
768215 ** 350W Amplifier Board (Pcb#319064) without Power Transistors
141102 *** 6 Contacts Vert Male Connector
140929 *** 9 Contacts Vert Male Connector
110316 *** Relay 24V / 1 Switch no 16A 250V
100904 *** LM393 Dual Comparator
100061 *** TL072 Dual J-Fet Operational Amplifier
090917 *** MJE350 TO126 Pnp Transistor
090916 *** MJE340 TO126 Npn Transistor
090201 *** 2N5401 TO92 Pnp Transistor
090200 *** 2N5550 TO92 Npn Transistor
090194 *** BC560 TO92 LN Pnp Transistor
090183 *** BC550 TO92 LN Npn Transistor
090153 *** BC327 TO92 Pnp Transistor
080901 *** VTL5C4 Analog Optoisolator
080245 *** 7V5 1W 5% Zener Diode
080171 *** FE6B 6A 100V Fast Recovery Diode
080156 *** 1N4002 1A 100V Rectifier Diode
080103 *** 1N4148 100mA 75V Signal Diode
070105 *** 470E 20% Vertical Linear Trimmer
060591 *** 8K2 2W 10% Resistor
060051 *** 0E22 5W 5% Wire Resistor
042695 *** 56K2 1/4W 1% Metalized Film Resistor
042687 *** 49K9 1/4W 1% Metalized Film Resistor
042605 *** 10K0 1/4W 1% Metalized Film Resistor
030715 *** 1000u 6v3 20% Vert Electrolytic Capacitor
340783 ** TO264 Mica Washer
340154 ** TO3/TO218 Mica Washer
340079 ** TO220 Mica Washer
340078 ** TO220 Insulated Bush
090924 ** MJL21194 TO264 Npn Transistor
090923 ** MJL21193 TO264 Pnp Transistor
090920 ** MJE802 TO126 Npn Darl Transistor
090919 ** MJE15031 TO220 Pnp Transistor
090918 ** MJE15030 TO220 Npn Transistor
090863 ** TIP36C TO218 Pnp Transistor
090862 ** TIP35C TO218 Npn Transistor
080821 ** Ptc 90 PTH59F04BE222TS
667699 * Rear Panel
237068237068
237068237068
237068 **
**
*Transformer 230Vac 350W (EU)Transformer 230Vac 350W (EU)
Transformer 230Vac 350W (EU)Transformer 230Vac 350W (EU)
Transformer 230Vac 350W (EU)
237069237069
237069237069
237069 **
**
*Transformer 115Vac 350W (US)Transformer 115Vac 350W (US)
Transformer 115Vac 350W (US)Transformer 115Vac 350W (US)
Transformer 115Vac 350W (US)
210215 * Adhesive Rubber Foam 10x1.9mm (Specify mt)
210212 * Slider Switch Adhesive Gasket
110614 * Mains Socket
110291 * Power Switch
110029 * T4A Fuse 5x20mm (EU)
110018 * T6.3A Fuse 5x20mm (EU)
110037 * T6.3A Fuse 6.3x32mm (US)
110036 * T4A Fuse 6.3x32mm (US)
080607 * KBPC25 25A 200V Rectifier Diode Bridge
020491 * 100nF 10% 250Vac Polyester Capacitor
Box AssemblyBox Assembly
Box AssemblyBox Assembly
Box Assembly
667703 Handle
667701 Grid
659027 White Pot Knob
659026 Orange Pot Knob
657273 Box
347393 Threaded Clog (to steady on the floor)
227060227060
227060227060
227060 15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker15" 4ohm Woofer Speaker
15" 4ohm Woofer Speaker
210242 Filler for Speaker Box (Specify m²)
210217 Black Sealer (specify mt)
210215 Adhesive Rubber Foam 10x1.9mm (Specify mt)
177721 Fixing Plate (to fix the Floor Bracket)
120965 M4i M5e x24mm Threaded Pin
120148 Screw M5x65mm for Handle
120147 Screw M4x8mm for Speakers
667704 Floor Bracket with Threaded Knobs
Note:Note:
Note:Note:
Note:
Each spare part is single quantity unless otherwise specified.
Asterisk prefix explanation:
Omitted = First level spare part.
One asterisk = Second level, part of previous listed first level part.
Two asterisk = Third level, part of previous listed second level part.
Three asterisk = ............
Any request for not above mentioned part must encompass specific description including:
1) Model name,
2) Section name,
3) Module code,
4) Reference name,
5) Quantity number.