Pyramid PB781X - Manual

frequency response power supply voltage output power @ 14.4v DC, 1KHz RMS Power @ 4 OhmsRMS Power @ 2 Ohms Maximum Power Output input sensitivity low level inputs high level inputs 40 Watts x 260 Watts x 2300 Watts x 2 15 Hz-30 KHz 250mV2.5V 14.4V DC Neg. Ground (10.5-16V) crossover mode selector in...

high level inputsinput level control crossover mode selector protection LED low pass frequency control bass boost level low level inputs power LED high pass frequency control speaker connections power terminals power fuse 6 pb781X features and controls 2 c h a m p P B 7 8 1 X

10 pb681Xpb881X features and controls 4 c h a m p P B 6 8 1 X • P B 8 8 1 X protection LED power LED ch 3/4 low level inputs ch 3/4 high level inputs ch 3/4 bass boost level controlch 3/4 low pass frequency controlch 3/4 high pass frequency control ch 3/4 crossover mode selector switch ch 3/4 input ...

GROUND +12V BATT REM FUSE L R BRIDGED + - - + - + to remote turn-on +12V head unit 12V battery 14 electrical connections 2 c h a m p P B 4 8 1 X • P B 7 8 1 X • P B 1 2 8 1 X pb481X pb781X pb1281X

head unit L/R Audio Outputs from speaker terminals L L R R using high level inputs head unit wiring harness PLEASE NOTE! If using high levelinputs, do not use the low level RCAinputs at the same time! 16 stereo input connections 2 c h a m p P B 4 8 1 X • P B 7 8 1 X • P B 1 2 8 1 X pb481X pb781X pb1...

head unit using low level inputs PLEASE NOTE! If using high levelinputs, do not use the low level RCAinputs at the same time! using high level inputs To a second amplifier Y Adaptors 17 mono input connections 2 c h a m p P B 4 8 1 X • P B 7 8 1 X • P B 1 2 8 1 X pb481Xpb781X pb1281X head unit wiring...

4 CH input connections using low level inputs 2 CH input connections using low level inputs Y adaptors R L FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db 0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db 0 BASS BOOST MIN MAX FREQ. CH 1 CH 2 80 Hz 35 400 Hz LPF HI IN CH4 CH3 + - - + HI IN CH2 CH1 + - - + LOW...

FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db 0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db 0 BASS BOOST MIN MAX FREQ. CH 1 CH 2 80 Hz 35 400 Hz LPF HI IN CH4 CH3 + - - + HI IN CH2 CH1 + - - + LOW IN BASS BOOST LEVEL FULL HPF LPF FULL HPF LPF POWER PROTECT REMOTE BASS BOOST(CH3/4) 4 CH floating ground ...

RIGHT FRONT Audio Outputs LEFT FRONT Audio Outputs 4 CH mono input connections using low level inputs 2 CH mono input connections using low level inputs Y adaptors L R FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db 0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db 0 BASS BOOST MIN MAX FREQ. CH 1 CH 2 80 Hz ...

4 CH floating ground connections 4 CH harness wiring for common ground connections from speaker terminals PLEASE NOTE! If using high level inputs,do not use the low level RCA inputs atthe same time! R L ORANGE ORANGE ORANGE ORANGE BLACK BLACK BLACK BLACK FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18d...

2 CH Bridged Output Mode with Subwoofer Output pb681X pb881Xpb1881X speaker connections 4 c h a m p P B 6 8 1 X • P B 8 8 1 X • P B 1 8 8 1 X 24 MINIMUM SPEAKER IMPEDANCE 4 OHMS! SPEAKERS R L SUBWOOFER REM CH3 CH4 GROUND +12V BATT BRIDGED FUSE BRIDGED + - - + - + - + - + - + CH1 CH2

mounting and installation 25 fuses wiring tips When making electrical connections to your amplifier, please observe thefollowing: Use at least 8 gauge wire for power and ground connections. Wire the amplifier directly to the car battery. For the ground connection, use the shortest possible wire to a...

The built-in protection circuitry in the PyramidCrystal amplifiers will disable the amplifier if itsenses an input overload, a speaker short circuit,or extreme temperature conditions. When the protection circuit is activated by any ofthese conditions, the Protection LED will beilluminated. If this o...