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congratulations...
on your purchase of a Pyramid Crystal 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
PB481X, PB681X, PB781X, PB881X, PB1281X,and
PB1881X, you’ll know you made the right choice
with a Pyramid Power amplifier.
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table of contents 2-3 general features high level input connections PB681X/PB881X/PB1881X 19 features and specifications mono input connections PB481X 4-5 PB681X/PB881X/PB1881X 20 PB781X 6-7 PB1281X 8-9 high level mono input connections 10-11 PB681X/PB881X PB681X/PB881X/PB1881X 21 PB1881X 12-13 speaker connections PB481X/PB781X/PB1281X 22 electrical connections 1 PB481X/PB781X/PB1281X 14 speaker connections PB681X/PB881X/PB1881X 15 PB681X/PB881X/PB1881X 23-24 mounting and installation 25 stereo
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general features PB481X PB781X PB1281X High Performance 600 Watt 2 Channel High Performance 1000 Watt 2 Channel High Performance 1600 Watt 2 Channel Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier · 300 Watts x 2 Output · 500 Watts x 2 Output · 800 Watts x 2 Output · 600 Watts x 1 Bridged Output · 1000 Watts x 1 Bridged Output · 1600 Watts x 1 Bridged Output · Variable Hi/Lo Electronic Crossover · Variable Hi/Lo Electronic Crossover · Variable Hi/Lo Electronic
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general features PB681X PB881X PB1881X High Performance 1000 Watt 4 Channel High Performance 1200 Watt 4 Channel High Performance 1800 Watt 4 Channel Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier Bridgeable MOSFET Amplifier · 250 Watts x 4 Output · 300 Watts x 4 Output · 450 Watts x 4 Output · 500W x 2 Bridged Output (250W x 2 + 500W x 1) · 600W x 2 Bridged Output (300W x 2 + 600W x 1) · 900W x 2 Bridged Output (450W x 2 + 900W x 1) · Dual Variable Hi/Lo Electronic Crossover Network ·
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features and controls 2 ch amp PB 481X pb481X power LED protection LED low level inputs high pass frequency control high level inputs low pass frequency control input level control 4 bass boost level crossover mode selector speaker connections power terminals power fuse
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features and specifications 2 ch amp PB 481X crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If output power @ 14.4v DC, 1KHz you wish to use the internal crossover to power a driver of specific frequency RMS Power @ 4 Ohms 40 Watts x 2 range, use the “LOWPASS” or “HIGHPASS” settings. RMS Power @ 2 Ohms 60 Watts x 2 input level control use this control to match the outputs of your head unit to the amplifier. Maximum Power Output 300 Watts x 2 Startin
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features and controls 2 ch amp PB781X pb781X power LED protection LED low level inputs high pass frequency control high level inputs low pass frequency control input level control 6 bass boost level crossover mode selector power terminals speaker connections power fuse
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features and specifications 2 ch amp PB781X crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If output power @ 14.4v DC, 1KHz you wish to use the internal crossover to power a driver of specific frequency RMS Power @ 4 Ohms 50 Watts x 2 range, use the “LOWPASS” or “HIGHPASS” settings. RMS Power @ 2 Ohms 75 Watts x 2 input level control use this control to match the outputs of your head unit to the amplifier. Maximum Power Output 500 Watts x 2 Starting
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features and controls 2 ch amp PB 1 2 8 1 X power LED pb1281X protection LED low level inputs Remote Bass Boost high pass frequency control high level inputs low pass frequency control input level control 8 bass boost level crossover mode selector power terminals speaker connections power fuse
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features and specifications 2 ch amp PB 1 2 8 1 X crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If output power @ 14.4v DC, 1KHz you wish to use the internal crossover to power a driver of specific frequency RMS Power @ 4 Ohms 75 Watts x 2 range, use the “LOWPASS” or “HIGHPASS” settings. RMS Power @ 2 Ohms 120 Watts x 2 input level control use this control to match the outputs of your head unit to the amplifier. Maximum Power Output 800 Watts x 2 S
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features and controls 4 ch amp PB 681X • PB881X power LED protection LED ch 1/2 input level control ch 3/4 input level control pb681X ch 3/4 high level inputs ch 1/2 high level inputs pb881X ch 3/4 low level inputs ch 1/2 low level inputs ch 3/4 crossover mode selector switch ch 1/2 crossover mode selector switch ch 3/4 bass boost level control ch 1/2 bass boost level control 10 ch 1/2 low pass frequency control ch 3/4 low pass frequency control ch 1/2 high pass frequency control ch 3/4 high pas
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features and specifications 4 ch amp PB 681X • PB881X PB PB 681X 881X 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 50 Watts x 4 RMS Power @ 2 Ohms 55 Watts x 4 60 Watts x 4 dual input level controls use these controls to match the outputs of your h
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features and controls 4 ch amp PB 1881X Remote Bass Boost ch 3/4 input level control ch 1/2 input level control ch 3/4 high level inputs ch 1/2 high level inputs pb1881X ch 3/4 low level inputs ch 1/2 low level inputs ch 3/4 crossover mode selector switch ch 1/2 crossover mode selector switch ch 3/4 bass boost level control ch 1/2 bass boost level control ch 3/4 low pass frequency control 12 ch 1/2 low pass frequency control ch 3/4 high pass frequency control ch 1/2 high pass frequency control p
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features and specifications 4 ch amp PB 1881X dual crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” PB 1881X If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. output power @ 14.4v DC, 1KHz RMS Power @ 4 Ohms 75 Watts x 4 dual input level controls use these controls to match the outputs of your head unit to the amplifier. RMS Power @ 2 Ohms 120 Watts x 4 Starting with
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electrical connections 2 ch amp PB481X • PB781X • PB1281X pb481X pb781X pb1281X REM FUSE L R +12V BATT GROUND + + - - 14 + - BRIDGED 12V battery head unit to remote turn-on +12V
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electrical connections 4 ch amp PB681X • PB881X • PB1881X REM FUSE CH1 CH2 CH3 CH4 pb681X GROUND +12V BATT + - + - + - + - pb881X + BRIDGED - + BRIDGED - pb1881X 12V battery 15 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 PB481X • PB781X • PB1281X using low level inputs pb481X pb781X pb1281X head unit L/R Audio Outputs 16 PLEASE NOTE! If using high level inputs, do not use the low level RCA using high level inputs inputs at the same time! head unit LL R R wiring harness from speaker terminals
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mono input connections 2 ch amp PB481X • PB781X • PB1281X using low level inputs pb481X pb781X pb1281X head unit To a second amplifier 17 Y Adaptors PLEASE NOTE! If using high level inputs, do not use the low level RCA using high level inputs inputs at the same time! head unit To a second amplifier L L R R wiring harness wiring harness from speaker terminals
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2/4 channel input connections 4 ch amp PB681X • PB881X • PB1881X 4 CH input connections using low level inputs BASS BASS CH 4 LEVEL FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 2 pb681X + - - + + - - + CH4 CH3 HPF HPF CH2 CH1 MIN MAX LPF 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db LPF MIN MAX HI IN HI IN FULL Hz Hz Hz Hz FULL CH 3 CH 1 REMOTE BASS BOOST(CH3/4) pb881X PROTECT POWER LOW IN LOW IN pb1881X L/R FRONT head unit Audio Outputs 18 L/R REAR Audio Outputs 2 CH inpu
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high level input connections 4 ch amp PB681X • PB881X • PB1881X 4 CH floating ground connections pb681X BASS BASS CH 4 LEVEL FREQ. BOOST LPF HPF HPF LPF BOOST FREQ. LEVEL CH 2 pb881X + - - + + - - + CH4 CH3 HPF HPF CH2 CH1 MIN MAX LPF 0 +18db 35 400 80 2.5k 80 2.5k 35 400 0 +18db LPF MIN MAX HI IN HI IN FULL Hz Hz Hz Hz FULL CH 3 CH 1 REMOTE BASS BOOST(CH3/4) pb1881X PROTECT POWER LOW IN LOW IN 19 4 CH harness wiring for common ground connections CH 3/4 CH 1/2 REAR L R LR FRONT
