APG SPDS12S User manual

USER MANUAL
APG DYNAMIC PROCESSORS
SPDS8 –SPDS12S – SPDS15 –SPDS15S
3000SP – 3000CSP – SPSC20

DYNAMIC PROCESSORS 1
SAFETY INSTRUCTIONS
This symbol, wherever it appears,
alerts you to the presence of
uninsulated dangerous voltage inside
the enclosure –voltage that may be
sufficient to constitute a risk of shock.
This symbol wherever it appears, alerts
you to important operating and
maintenance instructions in the
accompanying literature.
Read the manual
Caution: To reduce the risk of electrical shock, do not remove the cover (or back). No user serviceable parts inside; refer
servicing to qualified personnel.
Warning: To reduce the risk of fire electrical shock, do not expose this appliance to rain or moisture.
DETAILED SAFETY INSTRUCTIONS:
All the safety and operation instructions should be read before the appliance is operated.
Retain instructions:
The safety and operating instructions should be retained for future reference.
Heed warnings:
All warnings on the appliance and in the operating instructions should be adhered to.
Follow instructions:
All operation and user instructions should be followed.
Water and moisture:
The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or
near a swimming pool etc.)
Ventilation:
The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the
appliance should not be situated on a bed, sofa rug, or similar surface that may block the ventilation openings, or placed in a
built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.
Heat:
The appliance shouldbe situated away from heat sources such as radiators, heat registers, stoves, or other appliances
(including amplifiers) that produce heat.
Power source:
The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on
the appliance.
Grounding or polarization:
Precautions should be taken so that the grounding or polarization means of an appliance is not defeated.
Power-Cord Protection:
Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords and plugs, convenience receptacles and the point where they exit from the
appliance.
Cleaning:
The appliance should be cleaned only as recommended by the manufacturer.
Non-use Periods:
The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
Object and liquid Entry:
Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
Damage Requiring Service:
The appliance should be serviced by qualified service personnel when:
-The power supply cord or the plug has been damaged; or
-objects have fallen, or liquid has been spilled into the appliance; or
-the appliance has been exposed to rain; or
-The appliance does not appear to operate normally or exhibits a marked change in performance; or
-This appliance has been dropped, or the enclosure damaged.
Servicing: The user should not attempt to service the appliance beyond that is described in the Operating instructions. All other
servicing should be referred to qualified service personnel.

DYNAMIC PROCESSORS 2
CONTENTS
INTRODUCTION ................................................................................................................. 3
SPECIFICATIONS ................................................................................................................ 4
DESCRIPTION OF CONTROLS
FRONT PANEL ..................................................................................................................... 5
REAR PANEL......................................................................................................................... 7

DYNAMIC PROCESSORS 3
INTRODUCTION
The SPDS processors are designed to operate in conjunction with DS series speakers and sub-woofers,
optimizing equalization, filtering, protection and distribution of signals.
Each channel comprises and HF EQ stage, a LF EQ stage and a LF protection circuit, as well as a
dynamic protection system which emulates the main operating parameters of the speakers.
Left and Right input signals are mono-combined to feed the subwoofer channel which includes a VLF
EQ stage a level control, a VLF protection circuit, and a dynamic protection circuit.
When used without sub-woofer the unit provides suitable low-Frequency equalization and protection.
A switch allows operation with or without sub-woofer.
An internally derived mono signal is used to feed the sub-woofer output.
The crossover uses a Linkwitz-Riley function with 24 dB/octave slope.
The sub-woofer output level is adjustable with a front panel potentiometer.
The SPDS series feature electronically balanced inputs and outputs, in conjunction with a ground loop
eliminator circuit.
The polarity of the sub-woofer signal can be reversed in order to compensate wiring problems or
acoustical phase reversals.
A quarter-wave delay can be inserted to optimise time alignment.
The sub-woofer equalization can be chosen at 35 or 45Hz
The High frequency stacking equalization provides compensation of relative HF loss due to coupling
effect in multiple configurations.
The system can operate in wide-band mode or in bi-amped mode, with 24 dB/octave slopes. High and
low mute switches are provided.

DYNAMIC PROCESSORS 4
TECHNICAL SPECIFICATIONS
ELECTRICAL:
Input: Balanced, 20 KOhms
XLR3, pin 1 ground
Output: Balanced, 100 Ohms
XLR3, pin 1 ground
Noise: -94 dBu (22 Hz, 22 Hz)
HPD: < 0.01 % (4 dBu, 1 kHz)
Frequency response:Tailored to optimize frequency
response of DS series speakers.
Input Level:
Nominal: +4dBu
Maximum: +20dBu
Output Level:
Nominal:+4dBu
Maximum:+26dBu
Impedance:
Input:20 kOhms balanced
Output:100 Ohms balanced
SUBWOOFER CROSSOVER FREQUENCY:
High section cut-off (without sub)
SPDS15 / SPDS15S / SPDS15SR 80 Hz (24dB/Octave)
SPDS8 / SPDS12/ SPDS12S 100 Hz (24dB/Octave)
Connectors:XLR 3 pin
Consumption:220/240Vac 15VA
MECHANICAL:
Dimensions: 482,6 mm x 270 mm x 44,45 mm
Gross Weight: 3 kg
Finish:Black Epoxy

DYNAMIC PROCESSORS 5
DESCRIPTION OF CONTROLS
FRONT PANEL
A) SUB-WOOFER CONTROLS: :
Sub-woofer selection:
The row of switches located at the left of the unit allows to configure it for the type of sub-woofer
to be used. There is a choice of 8types of sub-woofers, 4 Standard and 4 High Power type
(represented by "S" on the front panel). Only one of the first four switches must be engaged at one
time. The “S” switch is used to choose the Standard (released) or High Power type (engaged).
2) Phase:When depressed this push-button introduces a polarity reversal to compensate wiring
problems or acoustical phase reversals.
3) Align: When depressed, this push-button introduces a delay of ƒwavelengths at the cross-over
frequency. In conjunction with the Phase switch, it allows optimum alignment of the sub-woofer
response.
4) Sub: this potentiometer controls the level of the sub-woofers. A center detent indicates the
nominal position. The range is from infinite attenuation to 6 dB gain.
B) MAIN SPEAKERS CONTROLS:
1) HF Stacking EQ: This potentiometer is used to equalize the power response when multiple stacks
are built, with an accompanying low-frequency coupling effect.
5) With Sub/No Sub: When engaged this switch inserts a High pass filter in the signal path,
providing the necessary cross-over function needed when subwoofers are used.
6) High ON/OFF: When released, this switch cuts the signal going to the main speakers.

DYNAMIC PROCESSORS 6
DESCRIPTION OF CONTROLS
FRONT PANEL
C) PROTECTION DISPLAYS :
7) & 9) Each output incorporates a protection circuitry which simulates the temperature of the voice-coil
and the excursion of the cone. This information is used to drive a limiter which prevents the
signal reach a dangerous value.
Clipping of the amps being recognized as a major cause of destruction of speakers, a level
detector prevents too high signals to reach the output. A set of 3 LED's is used to indicate that
operational parameters are exceeded and that the limiter is acting.
D) CALIBRATION OF ANTI-CLIP PROTECTION:
8) This potentiometer is used to calibrate the anti-clip protection of the SUB amp. The slot must be
oriented in regard of the figure corresponding to your amp's specifications.
10) This potentiometer is used to calibrate the anti-clip protection of the main amps. The slot must
be oriented in regard of the figure corresponding to your amp's specifications.
NB:
For proper operation of the protection circuitry, the gain of the amplifiers must be 26dB. Most
amplifiers provide this gain as standard.
Warning: Excessive gain may result in speaker damage.
In particular, bridged amps exhibit a gain 6db higher than standard.
When using bridged amps it is necessary to use one of the following process:
Use the button normal/bridge situated on the rear panel
Modify the amp's gain structure,
Use a 6 db input attenuator,
Turn the amp's potentiometer down 6 dB

DYNAMIC PROCESSORS 7
DESCRIPTION OF CONTROLS
REAR PANEL:
11) Normal/bridge: this switch must be engaged when using a bridged amp (32db gain)
All inputs and outputs are electronically balance: the connectors are 3 pin XLR'S
The mains receptacle is at the EEC standard with the center prong connected to ground. For
obvious safety reasons, it should always be connected.
The SPDS series can be operated continuously; thus they do not have a mains switch.
The SPDS series use a hum loop eliminator.
If any hum or buzz occurs, it is not caused by a ground loop.
The mains fuse must be replaced only with the same type and value
220-240Vac 0,1 A Temp.
100-125Vac 0,2 A Slow-blow

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