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PB-1838GX PB-738GX
PB-238GX PB-638GX
PB-1038GX
www.pyramidcaraudio.com
USER'S MANUAL
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congratulations... on your purchase of a Pyramid Royal Blue Series amplifier. This amplifier extends the Pyramid tradition into a totally new series of amps, designed from the ground up to deliver the power, performance and flexibility the modern car audio enthusiast demands. When you check the list of features offered by the PB-238GX, PB-638GX, PB-738GX, PB-1038GX, PB- 1838GX, you’ll know you made the right choice with a Pyramid Power amplifier.
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table of contents general features 2-3 high level input connections 16-17 PB-638GX/PB-1038GX features and specifications 4-5 PB-238GX mono input connections PB-738GX 6-7 PB-638GX/PB-1038GX 18 PB-1838GX PB-638GX/PB-1038GX 8-9 high level mono input connections 19 PB-638GX/PB-1038GX electrical connections PB-238GX 10-11 speaker connections 1 PB-638GX/PB-738GX PB-738GX/PB-1838GX 20 PB-1038GX/PB-1838GX speaker connections stereo input connections 21-22 PB-238GX/PB-638GX/PB-1038GX PB-738GX/PB-1838GX 1
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general features PB-238GX PB-638GX PB-738GX High Performance 400 Watt 4 Channel Amplifier High Performance 1600 Watt 4 Channel High Performance 1000 Watt 2 Channel Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier · 100 Watts x 4 Output · 400 Watts x 4 Output · 500 Watts x 2 Output · Variable Input Level (Gain) Control · 800W x 2 Bridged Output (400W x 2 + 800W x 1) · 1000W x 1 Bridged Output · Remote Turn On/Off · Dual Variable Hi/Lo Electronic Crossover Network · Variable Hi/Lo Electroni
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general features PB-1038GX PB-1836GX High Performance 4000 Watt 4 Channel High Performance 3000 Watt 2 Channel Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier · 1000 Watts x 4 Output · 1500 Watts x 2 Output · 2000 Watts x 2 Bridged Output(1000Wx2+2000Wx1) · 3000W x 1 Bridged Output · Dual Variable Hi/Lo Electronic Crossover Network · Variable Hi/Lo Electronic Crossover Network · Dual Variable Bass Boost (0 - +18 dB @ 60Hz) · Variable Bass Boost (0 - +18 dB @ 60Hz) · Variable Input Level
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features and controls 4 ch amp PB-238GX 4 CHANNEL POWER AMPLIFIER LOW IN LOW IN power LED CH 4 CH 3 CH 2 CH 1 LEVEL LEVEL HI IN HI IN CH4 CH3 CH2 CH1 POWER MIN MAX MIN MAX 4 high level inputs high level inputs low level inputs low level inputs input level control input level control REM FUSE CH1 CH2 CH3 CH4 GROUND +12V BATT + - + - + - + - power terminals speaker connections power fuse + - - + + - - +
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features and specifications 4 ch amp PB-238GX input level control use this control to match the outputs of your head unit to the amplifier. output power @ 14.4v DC, 1KHz Starting with your head unit set at about the 2 o’clock position, increase RMS Power @ 4 Ohms 30 Watts x 4 the amp level control until distortion begins to occur, and reduce slightly Maximum Power Output 100 Watts x 4 from this point. low level inputs this amp features gold-plated RCA input jacks for high impedance input. freque
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features and controls 2 ch amp PB-738GX • PB-1238GX power LED 2 CHANNEL MOSFET AMPLIFIER REMOTE L protection LED BASS BOOST BASS HPF LPF BOOST LEVEL HI IN FREQ. R L PROTECT POWER + - - + R Remote Bass Boost HPF 80 2.5k 35 400 0 +18db MIN MAX LPF Hz Hz FULL LOW IN high pass frequency control 6 low pass frequency control high level inputs low level inputs bass boost level crossover mode selector input level control REM FUSE L R GROUND +12V BATT + - + - power terminals speaker connectio
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features and specifications 2 ch amp PB-738GX • PB-1838GX PB-738GX PB-1838GX crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” output power @ 14.4v DC, 1KHz If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. RMS Power @ 4 Ohms 75 Watts x 2 150 Watts x 2 RMS Power @ 2 Ohms 125 Watts x 2 250 Watts x 2 input level controls use these controls to match the outputs of your h
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features and controls 4 ch amp PB-638GX • PB-1038GX ch 3/4 input level control ch 1/2 input level control BASS BASS LEVEL CH 4 FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 2 ch 3/4 high level inputs ch 1/2 high level inputs + - - + + - - + CH4 CH3 CH2 CH1 HPF HPF MIN MAX LPF 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db LPF MIN MAX HI IN FULL FULL HI IN CH 3 Hz Hz Hz Hz CH 1 REMOTE CHANNEL 3/4 BASS BOOST(CH3/4) CHANNEL 1/2 PROTECT POWER LOW IN LOW IN 4 CHANNEL MOSFET AMPLIFIE
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features and specifications 4 ch amp PB-638GX • PB-1038GX PB-638GX PB-1038GX dual crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” output power @ 14.4v DC, 1KHz If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. RMS Power @ 4 Ohms 35 Watts x 4 75 Watts x 4 RMS Power @ 2 Ohms 65 Watts x 4 125 Watts x 4 dual input level controls use these controls to match the outputs o
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electrical connections 2 ch amp PB-738GX • PB-1838GX REM FUSE L R GROUND +12V BATT + - + - 10 + BRIDGED - 12V battery head unit to remote turn-on +12V
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electrical connections 4 ch amp PB-238GX • PB-638GX • PB-1038GX REM FUSE CH1 CH2 CH3 CH4 GROUND +12V BATT + - + - + - + - + BRIDGED BRIDGED - + - 11 12V battery head unit REM FUSE CH1 CH2 CH3 CH4 GROUND +12V BATT + - + - + - + - to remote turn-on +12V + BRIDGED - + BRIDGED - 12V battery head unit to remote turn-on +12V
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stereo input connections 2 ch amp PB-738GX • PB-1838GX using low level inputs 2 CHANNEL MOSFET AMPLIFIER REMOTE L BASS BOOST BASS HPF LPF BOOST LEVEL HI IN FREQ. R L PROTECT POWER + - - + R HPF 80 2.5k 35 400 0 +18db MIN MAX LPF Hz Hz FULL LOW IN head unit L/R Audio Outputs 12 Y Adaptors PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! using high level inputs head unit 2 CHANNEL MOSFET AMPLIFIER REMOTE L BASS BOOST BASS LPF LEVEL HPF BO
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mono input connections 2 ch amp PB-738GX • PB-1838GX using low level inputs 2 CHANNEL MOSFET AMPLIFIER L REMOTE BASS BOOST BASS HPF LPF LEVEL BOOST HI IN FREQ. PROTECT POWER R L + - - + R HPF 80 2.5k 35 400 0 +18db MIN MAX LPF Hz Hz LOW IN FULL head unit 13 To a second amplifier Y Adaptors PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! using high level inputs head unit 2 CHANNEL MOSFET AMPLIFIER L REMOTE BASS BOOST BASS HPF LPF LEVEL
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2/4 channel input connections 4 ch amp PB-238GX 4 CH input connections using low level inputs 4 CHANNEL POWER AMPLIFIER LOW IN LOW IN CH 4 CH 3 CH 2 CH 1 LEVEL LEVEL HI IN HI IN CH4 CH3 CH2 CH1 POWER MIN MAX MIN MAX L/R FRONT head unit Audio Outputs 14 L/R REAR Audio Outputs 2 CH input connections using low level inputs 4 CHANNEL POWER AMPLIFIER LOW IN LOW IN CH 4 CH 3 CH 2 CH 1 LEVEL LEVEL HI IN HI IN CH4 CH3 CH2 CH1 POWER MIN MAX MIN MAX L R Y adaptors + - - + + - -
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high level input connections 4 ch amp PB-238GX 4 CH floating ground connections 4 CHANNEL POWER AMPLIFIER LOW IN LOW IN CH 4 CH 3 CH 2 CH 1 LEVEL LEVEL HI IN HI IN CH4 CH3 CH2 CH1 POWER MIN MAX MIN MAX 15 4 CH harness wiring for common ground connections CH 3/4 CH 1/2 REAR L R L R FRONT ORANGE ORANGE REAR L R L R FRONT BLACK BLACK BLACK BLACK ORANGE ORANGE ORANGE ORANGE from speaker terminals BLACK BLACK PLEASE NOTE! If using high level inputs, BLACK BLACK do not use the low level RCA in
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Stereo input connections 4 ch amp PB-638GX • PB-1038GX 4 CH Stereo input connections using low level inputs BASS BASS CH 4 LEVEL FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 2 + - - + + - - + CH4 CH3 HPF HPF CH2 CH1 LPF LPF HI IN MIN MAX 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db MIN MAX HI IN FULL FULL CH 3 Hz Hz Hz Hz CH 1 REMOTE BASS BOOST(CH3/4) CHANNEL 3/4 CHANNEL 1/2 PROTECT POWER LOW IN LOW IN 4 CHANNEL MOSFET AMPLIFIER L/R FRONT head unit Audio Outputs 16 L/R REAR
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high level Stereo input connections 4 ch amp PB-638GX • PB-1038GX 4 CH floating ground connections BASS BASS LEVEL FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 4 CH 2 + - - + + - - + CH4 CH3 HPF HPF CH2 CH1 LPF LPF HI IN MIN MAX 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db MIN MAX HI IN FULL FULL CH 3 Hz Hz Hz Hz CH 1 REMOTE BASS BOOST(CH3/4) CHANNEL 3/4 CHANNEL 1/2 PROTECT POWER LOW IN LOW IN 4 CHANNEL MOSFET AMPLIFIER 17 4 CH harness wiring for common ground connections CH
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mono input connections 4 ch amp PB-638GX • PB-1038GX 4 CH mono input connections using low level inputs BASS BASS CH 4 LEVEL FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 2 + - - + + - - + CH4 CH3 HPF HPF CH2 CH1 LPF LPF HI IN MIN MAX 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db MIN MAX HI IN FULL FULL CH 3 Hz Hz Hz Hz CH 1 REMOTE CHANNEL 3/4 BASS BOOST(CH3/4) CHANNEL 1/2 PROTECT POWER LOW IN LOW IN 4 CHANNEL MOSFET AMPLIFIER head unit LEFT FRONT Audio Outputs 18 RIGHT FRONT
