MadBoy F-LOUD 370 User manual

OWNER’S MANUAL
DIGITAL POWER AMPLIFIER
F-LOUD 370
WWW.MADBOY-AUDIO.COM
ENGLISH
DIGITAL POWER AMPLIFIER
F-LOUD 370
POWE R
FAULT
CLIP
SIGN AL
POWE R
FAULT
CLIP
SIGN AL
CHANNEL A CHANNEL B
POWER
MIN MA X
LINE
OPTI CAL
SOUR CE MIN MAX

Table of Contents
Safety Instructions ......................................................................................................
Getting Started
Features ..................................................................................................................
Connectors ..............................................................................................................
What’s in the Box ....................................................................................................
Front Panel .................................................................................................................
Back Panel .................................................................................................................
Getting Connected .....................................................................................................
Connecting the Speakers ............................................................................................
Connecting the Audio Source .....................................................................................
Connection Examples .................................................................................................
Connector Pinouts And Wiring Diagrams ...................................................................
Technical Specifications .............................................................................................
3
4
4
5
6
7
8
9-11
12-13
14-20
21
22
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Safety Instructions
3
Explanation of graphical symbols
1. Read instructions: All safety and operating instructions should be read before installation.
2. Keep instructions: Safety and operating instruction should be retained for future reference.
3. Heed warnings: Warnings on the apparatus and in the operating instruction should be adhered to.
4. Follow instructions: All operating instructions should be followed.
5. Accessories: Only use accessories specified by the manufacturer.
6. Water and moisture: Do not use this apparatus near water.
7. Ventilation: Do not block any ventilation openings.
8. Heat: Do not install near heat sources such as radiators or other apparatus that produces heat.
9. Protect power cord: Power cord should be placed so that it is not likely to be walked on or pinched
by items placed upon it. Do not use the apparatus if power cord is damaged.
10. Cleaning: Unplug power cord before cleaning. Do not use liquid cleaners or aerosol cleaners. Use
a damp cloth for cleaning.
11. Nonuse periods: Unplug the power cord if apparatus is left unused for a long period of time.
12. Objects and liquids: Care should be taken so that object do not fall and liquids are not spilled into
the enclosure through the openings.
13. Damage requiring service: The apparatus should be serviced by qualified service personnel
when:
A. Objects has fallen inside enclosure.
B. The apparatus has exposed to rain or moisture.
C. The apparatus has been dropped or enclosure is damaged.
D. The apparatus do not operate normally.
14. Servicing: Refer all servicing to the qualified service personnel.
15. Warranty: Warranty service should be done by qualified service personnel authorized by Madboy
Audio International Oy. Warranty is invalidated if a warranty seal has been altered, removed or
defaced.
Warning!
To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
CAUTION: To reduce the risk of electric shock, do not
remove cover. No user-serviceable parts inside. Only refer
servicing to qualified service personnel.
The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of danger.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
servicing instructions.

Getting Started
Features:
Ÿ370 W Digital Power Amplifier
ŸClass D amplifier with 2 x 185 W RMS (4 Ω) or 2 x 105 W RMS (8 Ω) output power
ŸHigh Performance 24-bit / 192 kHz Codec
ŸDigital optical input for connecting to digital audio sources
ŸBalanced XLR / 1/4" combo jacks for connecting to analog audio sources
ŸSupports PCM audio with 32 kHz-192 kHz sampling rates in Optical input
Ÿ192 kHz sampling rate for analog inputs
ŸDigital optical output loop for chaining multiple amplifiers
ŸIndividual volume controls for both channels
ŸSpeakon and 2-way binding post for the speakers
ŸInput selection switch
ŸLED indicators
ŸTwo temperature controlled cooling fans
ŸAmplifier is protected against DC, overtemperature, overload and short-circuit
ŸAC 115 V or 230 V for worldwide use
ŸInputs:
§Optical input (S/PDIF)
§Two balanced XLR / 1/4" combo jacks
ŸOutputs:
§Two Speakon terminals
§Two binding posts
§Optical output (loop)
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4
Connectors:

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5
What’s in the Box:
F-LOUD 370 (1)
POWER CABLE (1)
OWNER’S MANUAL
DIGI TAL POWE R AMPL IFIER
F-LOUD 370
WWW.MADBOY-AUDIO.COM
ENGLI SH
USER GUIDE (1)
DIGITAL POWER AMPLIFIER
F-LOUD 370
POWE R
FAULT
CLIP
SIGN AL
POWE R
FAULT
CLIP
SIGN AL
CHAN NEL A CHAN NEL B
POWER
MIN MA X
LINE
OPTI CAL
SOUR CE MIN MAX
DIGITAL POWER AMPLIFIER
F-LOUD 370
POWER
FAULT
CLIP
SIGNAL
POWER
FAULT
CLIP
SIGNAL
CHANNEL A CHANNEL B
POWER
MIN MAX
LINE
OPTICAL
SOURCE MIN MAX
Getting Started

DIGITAL POWER AMPLIFIER
F-LOUD 370
POWE R
FAULT
CLIP
SIGN AL
POWE R
FAULT
CLIP
SIGN AL
CHANNEL A CHANNEL B
POWER
MIN MA X
LINE
OPTI CAL
SOUR CE MIN MAX
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Front Panel
1 2 3
5
6
7
8
1. POWER SWITCH: Press this switch to turn the power ON or OFF.
2. VENT OPENINGS: Do not cover ventilation openings to ensure circulation of air.
3. VOLUME: For adjusting the volume for each channel. Set the volume to minimum
before turning on the system.
4. SOURCE: Source switch for selecting input channel and lights for currently used
channel.
5. POWER LIGHTS: Indicates that the system is turned on.
6. SIGNAL LIGHTS: Indicates the input signal level. Intensity changes according to the
input signal level and volume.
7. FAULT LIGHTS: Indicates that amplifier has fault condition.
8. CLIP LIGHTS: Lights are blinking if audio signal is at the onset to output clipping
(typically ~0.01% THD). Lights are continuously on if amplifier temperature has reached
125 °C.
6
4

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Back Panel
1 2 3 45
1. LINE INPUT: For connecting the audio source using balanced or unbalanced 1/4" plug
or balanced XLR connector.
2. OPTICAL INPUT: For connecting the digital audio source using Toslink cable. 2-
channel PCM audio format supported.
3. OPTICAL OUTPUT: Optical output loop for chaining multiple amplifiers.
4. SPEAKER OUTPUTS: For connecting the speakers using speakon cable. Both 2-pole
and 4-pole speakon connectors are supported. See speakon wiring diagram on the page
21.
5. SPEAKER OUTPUTS: For connecting the speakers using speaker wire or speaker
wire with banana plugs.
6. COOLING FAN: Do not cover the ventilation openings to ensure circulation of air.
7. AC VOLTAGE SELECTOR: For switching input voltage, AC 115 / 230 V
8. POWER INPUT: Insert the power cable here.
7
6
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
SPEAKER OUTPUTS
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
SPEAKER IMPEDANCE
4 Ω MINIMUM
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
7 8

Before making any connections, make sure that power is turned off from the amplifier.
Audio source can be connected using analog or digital connection. Analog connection can
be made using unbalanced or balanced 1/4" plug jack connector or balanced XLR
connector. Digital connection can be made using digital Toslink cable. Notice that S/PDIF
format must be set to PCM from the audio source.
Optical input signal is looped out from optical output connector. This allows chaining
multiple amplifiers digitally using Toslink cable. Notice that audio connected to line input
cannot be taken out from optical output.
Audio input is selected using the switch on the front panel. Currently used input channel is
saved and selected after turning on the amplifier. Source lights are indicating currently
used input source and they have also alternative function. Line light is blinking if audio
input signal is clipping. If light is blinking, decrease volume from the audio source until the
light is continuously on. Optical light is blinking if data is invalid or compressed audio.
Speakers can be connected using bare speaker wire, speaker wire with banana plugs or
speakon cable. Minimum allowed speaker impedance is 4 . See detailed connection Ω
examples on the page 14-20.
The amplifier is protected against DC, short-circuit, overtemperature and overload due to
too low speaker impedance. Fault condition is indicated with fault and clip lights in the front
panel. Lights are shared with both channels.
Clip lights are blinking in case the audio signal distortion reach 0.01%. If the clip lights are
continuously on, the amplifier’s temperature has reached 125°C. Reduce the volume from
the front panel and let the amplifier to cool down. Lights turns off after the amplifier has
cooled down.
Fault lights turns on in case that the amplifier has overheated (155°C), overloaded or there
is a short-circuit or DC voltage at the speaker output. Wait until the amplifier has cooled
down and check that speaker impedance is not below minimum allowed impedance.
Notice! If speakers with same impedance are connected in parallel, the impedance halves.
Two speakers with 8 impedance can be connected in parallel.Ω
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Getting Connected
8

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Connecting the Speakers
Insert the plug tightly into the
terminal
Tighten the terminal by
turning it clockwise
Profile
Connecting the speaker with a banana plug
CHANNEL A
CHANNEL B
SPEAKER OUTPUTS
Connecting the speaker with the Speakon cable
OPEN CLOSE
Loose the terminal
by turning it
counterclockwise
Insert the stripped end of the
speaker cable into the
terminal
Strip 10mm from
the end of the cable
Twist the stripped wire
Connecting the speaker with speaker wire
Tighten the speaker
terminal by turning it
clockwise
1 2 34
1 2 3
How to connect the Speakon cable:
Push the speakon cable into the speakon
connector and close it by turning clockwise.
How to remove the Speakon cable:
Open the speakon connector by pulling
release lever backwards and turning it
counterclockwise.
9
Notice! Speakon and binding post connectors are connected in parallel. Minimum speaker
impedance is 8 if both Speakons and binding posts are used same time.Ω

CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
SPEAKER OUTPUTS
+-
LEFT
RIGHT
+-
Connecting the Speakers
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Connecting the speakers with speaker wire:
10

CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
SPEAKER OUTPUTS
+-
LEFTRIGHT
+-
Connecting the Speakers
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Connecting the speakers with the Speakon cable:
OPEN CLOSE OPEN CLOSE
11

Connecting the Audio Source
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Connecting the audio source using
RCA - unbalanced 1/4" plug:
AUDIO OUTPUT
R L
F-LOUD 370 BACK PANEL
KARAOKE PLAYER / MIXER
BACK PANEL
RCA - UNBALANCED 1/4" PLUG CABLE
F-LOUD 370 BACK PANEL
KARAOKE PLAYER / MIXER
BACK PANEL
XLR FEMALE - XLR MALE CABLE
RL
Connecting the audio source using
balanced XLR - XLR cable:
12
CHANNEL ACHANNEL B
LINE INPUT
CHANNEL ACHANNEL B
LINE INPUT

Connecting the Audio Source
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Connecting the audio source using digital Toslink cable:
KARAOKE PLAYER / MIXER
BACK PANEL
13
CHANNEL ACHANNEL B
LINE INPUT
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
OPTICAL
OUTPUT
CHANNEL ACHANNEL B
LINE INPUT
TOSLINK CABLE
F-LOUD 370 BACK PANEL
Notice! Set optical (S/PDIF) audio format to PCM from the audio source.

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Connection Examples
MFP-1000 BACK PANEL
F-LOUD 370 BACK PANEL
1. Connecting to the MFP-1000 karaoke player and Screamer-208 passive speakers.
RCA - UNBALANCED 1/4" PLUG CABLE
LEFTRIGHT
+-+-
SPEAKER WIRE
SCREAMER-208 PASSIVE SPEAKERS
LR
R
L
14
SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 MINIMUMΩ
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP

SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 MINIMUMΩ
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Connection Examples
SUB
L
RL R
L
R
KARAO KE OUT PUT MIXE D OUTP UT
HDMI O UTPU T
SURRO UND OU TPUT AV OUTP UT
CLAS S 1 LASER P RODUCT
KLAS SE 1 LASE R PRODUCT
LUOK AN 1 LASE R LAITE
KLAS S 1 LASER A PA RAT
MODE L:MFP-2000
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POWE R SUPPLY ~100V-240V,
50/60Hz, <15W
SERI AL NO.:
POWE R INPU T
AC ~100-240V
50/60Hz 15W
MFP-2000 BACK PANEL
LL
R R
F-LOUD 370 BACK PANEL
LEFTRIGHT
+-+-
SPEAKER WIRE
2. Connecting to the MFP-2000 with RCA - 1/4" plug cable and Screamer-208
speakers.
RCA - UNBALANCED 1/4" PLUG CABLE
SCREAMER-208 PASSIVE SPEAKERS
LR
L
R
15
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP

SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 Ω MINIMUM
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F-LOUD 370 BACK PANEL
LEFTRIGHT
+-+-
SPEAKER WIRE
3. Connecting to the MFP-2000 with balanced XLR cable and Screamer-208
speakers.
BALANCED XLR MALE - XLR FEMALE CABLE
SCREAMER-208 PASSIVE SPEAKERS
SUB
L
RL R
L
R
KARAO KE OUT PUT MIXE D OUTP UT
HDMI O UTPU T
SURRO UND OU TPUT AV OUTP UT
CLAS S 1 LASER P RODUCT
KLAS SE 1 LASE R PRODUCT
LUOK AN 1 LASE R LAITE
KLAS S 1 LASER A PA RAT
MODE L:MFP-2000
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POWE R SUPPLY ~100V-240V,
50/60Hz, <15W
SERI AL NO.:
POWE R INPU T
AC ~100-240V
50/60Hz 15W
MFP-2000 BACK PANEL
LR
L R
16
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
Connection Examples

SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 Ω MINIMUM
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4. Connecting to the BLENDER-422U and Screamer-208 passive speakers.
F-LOUD 370 BACK PANEL
LEFTRIGHT
+-+-
SPEAKER WIRE
SCREAMER-208 PASSIVE SPEAKERS
BLENDER-422U
MAIN OUT
L
R
UNBALANCED 1/4" PLUG CABLE
L
R
R L
17
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
Connection Examples

SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 Ω MINIMUM
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5. Connecting to the MFP-1000X with Toslink cable and Screamer-208 passive
speakers.
F-LOUD 370 BACK PANEL
LEFTRIGHT
+-+-
SPEAKER WIRE
SCREAMER-208 PASSIVE SPEAKERS
18
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
TOSLINK CABLE
Connection Examples
MFP-1000X BACK PANEL

SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 Ω MINIMUM
SPEAKER OUTPUTS
SPEAKER IMPEDANCE
4 Ω MINIMUM
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
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6. Chaining two F-LOUD 370 amplifiers
F-LOUD 370 BACK PANEL
LEFT
RIGHT
+-+-
SPEAKER WIRE
SCREAMER-208 PASSIVE SPEAKERS
19
F-LOUD 370 BACK PANEL
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
+-
LEFT
RIGHT
+-
OPTICAL
OUTPUT
AUDIO SOURCE
TOSLINK CABLE
Connection Examples
SPEAKER WIRE
TOSLINK CABLE

SPEAKER IMPEDANCE
4 Ω MINIMUM
SPEAKER OUTPUTS
CHANNEL A
CHANNEL BCHANNEL A
CHANNEL B
CHANNEL ACHANNEL B
LINE INPUT
MODE L: F-LOUD 370
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SERI AL NO.:
POWER INPUT
VOLTAGE SELECTOR
AC 115/230V, 50/60Hz
OPTICAL
INPUT
OPTICAL
OUTPUT
OPTICAL
LOOP
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7. Connecting F-LOUD 370 to the Remix-33 mixer using digital Toslink-cable
F-LOUD 370 BACK PANEL
LEFT
RIGHT
+-+-
SPEAKER WIRE
SCREAMER-208 PASSIVE SPEAKERS
20
Connection Examples
TOSLINK CABLE
POWE R IN
AC 100 - 240 V, 50/60 Hz
AV INPUTS
AV 1
AV 2
L R VIDE O
MIC 1 MIC 2
BALA NCED M IC IN PUTS
USB
AUDI O
OPTI CAL
IN
OPTI CAL
OUT
SUBW OOFER
OUT AC V OLTA GE SELECTOR
230V
AV OUTPUTS
L R VIDE O
MODE L: REMIX-33
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SERI AL NO.:
REMIX-33 BACK PANEL