Table of Contents
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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
Related Manuals for Pyramid PB1281X
Summary of Contents for Pyramid PB1281X
- Page 1 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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Page 2: Table Of Contents
PB481X PB781X PB1281X PB681X/PB881X PB1881X electrical connections PB481X/PB781X/PB1281X PB681X/PB881X/PB1881X stereo input connections PB481X/PB781X/PB1281X mono input connections PB481X/PB781X/PB1281X 2/4 channel input connections PB681X/PB881X/PB1881X high level input connections PB681X/PB881X/PB1881X mono input connections PB681X/PB881X/PB1881X high level mono input connections... -
Page 3: General Features
· THD: <0.04% · Thermal Protection · Overload Protection · Short Circuit Protection · Anti-Thump Turn-On PB1281X High Performance 1600 Watt 2 Channel Bridgeable MOSFET Amplifier · 800 Watts x 2 Output · 1600 Watts x 1 Bridged Output · Variable Hi/Lo Electronic Crossover Network ·... -
Page 4: General Features
PB681X High Performance 1000 Watt 4 Channel Bridgeable MOSFET Amplifier · 250 Watts x 4 Output · 500W x 2 Bridged Output (250W x 2 + 500W x 1) · Dual Variable Hi/Lo Electronic Crossover Network · Dual Variable Bass Boost (0 - +18 dB @ 60Hz) ·... -
Page 5: Pb481X
pb481X power LED protection LED high pass frequency control low pass frequency control bass boost level crossover mode selector speaker connections features and controls 2 c h a m p P B 4 8 1 X low level inputs high level inputs input level control power terminals power fuse... - Page 6 crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If you wish to use the internal crossover to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. input level control use this control to match the outputs of your head unit to the amplifier.
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Page 7: Pb781X
pb781X power LED protection LED high pass frequency control low pass frequency control bass boost level crossover mode selector speaker connections features and controls 2 c h a m p P B 7 8 1 X low level inputs high level inputs input level control power terminals power fuse... -
Page 8: Input Sensitivity
crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If you wish to use the internal crossover to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. input level control use this control to match the outputs of your head unit to the amplifier. -
Page 9: Pb1281X
LED pb1281X protection LED Remote Bass Boost high pass frequency control low pass frequency control bass boost level crossover mode selector speaker connections features and controls 2 c h a m p P B 1 2 8 1 X... -
Page 10: Pb1281X
features and specifications crossover mode selector when used with normal, full range systems, set this switch to “FULL.” If you wish to use the internal crossover to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. input level control use this control to match the outputs of your head unit to the amplifier. -
Page 11: Pb681X/Pb881X
power LED protection LED ch 3/4 input level control pb681X ch 3/4 high level inputs pb881X ch 3/4 low level inputs ch 3/4 crossover mode selector switch ch 3/4 bass boost level control ch 3/4 low pass frequency control ch 3/4 high pass frequency control speaker connections features and controls 4 c h a m p P B 6 8 1 X •... -
Page 12: Pb681X/Pb881X
features and specifications dual crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. dual input level controls use these controls to match the outputs of your head unit to the amplifier. -
Page 13: Pb1881X
ch 3/4 input level control pb1881X ch 3/4 high level inputs ch 3/4 low level inputs ch 3/4 crossover mode selector switch ch 3/4 bass boost level control ch 3/4 low pass frequency control ch 3/4 high pass frequency control protection LED power LED speaker connections... - Page 14 features and specifications dual crossover mode selectors when used with normal, full range systems, set these switches to “FULL.” If you wish to use the internal crossovers to power a driver of specific frequency range, use the “LOWPASS” or “HIGHPASS” settings. dual input level controls use these controls to match the outputs of your head unit to the amplifier.
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Page 15: Electrical Connections
781X pb1281X electrical connections 2 ch amp PB481X • PB781X • PB1281X FUSE GROUND +12V BATT BRIDGED to remote turn-on +12V 12V battery head unit... -
Page 16: Pb681X/Pb881X/Pb1881X
pb681X pb881X pb1881X BRIDGED BRIDGED electrical connections 4 ch amp PB681X • PB881X • PB1881X BRIDGED BRIDGED FUSE GROUND +12V BATT 12V battery to remote turn-on +12V FUSE GROUND +12V BATT 12V battery to remote turn-on +12V head unit head unit... -
Page 17: Stereo Input Connections
2 ch amp PB481X • PB781X • PB1281X L/R Audio Outputs head unit PLEASE NOTE! If using high level inputs, do not use the low level RCA... -
Page 18: Mono Input Connections
To a second amplifier wiring harness from speaker terminals mono input connections 2 ch amp PB481X • PB781X • PB1281X Y Adaptors head unit head unit PLEASE NOTE! If using high level inputs, do not use the low level RCA... -
Page 19: 2/4 Channel Input Connections
2/4 channel input connections 4 CH input connections using pb681X + - - + CH4 CH3 pb881X HI IN pb1881X L/R REAR Audio Outputs 2 CH input connections using + - - + CH4 CH3 HI IN 4 ch amp PB681X • PB881X • PB1881X low level inputs BASS BASS... -
Page 20: High Level Input Connections
4 CH floating ground connections pb681X LEVEL CH 4 pb881X + - - + CH4 CH3 HI IN CH 3 pb1881X LOW IN REAR ORANGE BLACK BLACK ORANGE PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! high level input connections 4 ch amp PB681X •... -
Page 21: Mono Input Connections
4 CH mono input connections using pb681X + - - + CH4 CH3 HI IN pb881X pb1881X 2 CH mono input connections using + - - + CH4 CH3 HI IN mono input connections 4 ch amp PB681X • PB881X • PB1881X low level inputs BASS BASS... -
Page 22: High Level Mono Input Connections
high level mono input connections 4 CH floating ground connections pb681X CH 4 + - - + pb881X CH4 CH3 HI IN CH 3 pb1881X LOW IN ORANGE BLACK BLACK ORANGE PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! 4 ch amp PB681X •... -
Page 23: Pb481X/Pb781X/Pb1281X 22
2 ch amp PB481X • PB781X • PB1281X Stereo Output Mode pb481X pb 781X pb1281X Bridged Mono Output Mode LEFT speaker RIGHT speaker MINIMUM SPEAKER IMPEDANCE 4 OHMS! speaker... -
Page 24: Pb681X/Pb881X/Pb1881X
4 CH Output Mode pb681X pb881X pb1881X Bridged Dual Mono Output Mode speaker connections 4 ch amp PB681X • PB881X • PB1881X FUSE GROUND BRIDGED BRIDGED FRONT speakers REAR speakers FUSE GROUND BRIDGED BRIDGED speakers +12V BATT +12V BATT MINIMUM SPEAKER IMPEDANCE 4 OHMS! - Page 25 2 CH Bridged Output Mode with Subwoofer Output pb681X pb881X pb1881X speaker connections 4 ch amp PB681X • PB881X • PB1881X FUSE BRIDGED BRIDGED SPEAKERS SUBWOOFER GROUND +12V BATT MINIMUM SPEAKER IMPEDANCE 4 OHMS!
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Page 26: Mounting And Installation
mounting Your new Pyramid Crystal Series amplifier comes complete with all required mounting hardware. When determining a suitable location in your vehicle for the amp, please remember that it is a high-power electronic device capable of generating high heat. For this reason, always choose a location in your vehicle which has low vibration, adequate ventilation, a minimum of dust, and no moisture. Be sure to mount the amp in such a manner as to allow reasonable airflow over the cooling fins. -
Page 27: Protection Circuitry And Troubleshooting
protection circuitry The built-in protection circuitry in the Pyramid Crystal amplifiers will disable the amplifier if it senses an input overload, a speaker short circuit, or extreme temperature conditions. When the protection circuit is activated by any of these conditions, the Protection LED will be illuminated. -
Page 28: Precautions
precautions notes Do not operate the amplifier when it is unmounted. Attach all audio system components securely within the automobile to prevent damage, especially in an accident. Do not mount this amplifier so that the wire connections are unprotected, or in a pinched condition, or likely to be damaged by nearby objects.