CONNECT THE NEGATIVE SPEAKER TERMINAL TO THE POSITIVE TERMINAL OF CH2 (R-CH) ON THE AMPLIFIER BE SURE TO SELECT BRIDGED SWITCH KNOB FOR PROPER OPERATION. BRIDGED MODE INPUT WIRING CAR SIGNAL INPUT (RCA LINE OUT) MUST BE CONNECTED TO ONLY EACH "L" CHANNEL (BRIDG SWITCH KNOB SHOULD BE SELECTED MO). IF CAR SIGNAL INPUT IS CONNECTED TO "R" CHANNEL THERE SHALL BE NO POWER OUT (NO SOUND). -8 -9- CONNECTIONS PB610SX/ PB800SX/ PB1000SX PB610SX/ PB800SX/ PB1000SX STEREO MODE NOTE: REMOTE BASS BOOST IS A

Rest assured you have purchased a quality product designed and engineered to give you many years of uncompromised musical service. This amplifier has been designed using the latest in electronic technology available today and will provide you with years and years of high quality sound level amplification and reproduction. This amplifier have been designed with a fully regulated 100% MOSFET Power supplies assuring extremely quick switching response and self protection with soft starting power tur

At this time please check your system to see what is causing the protection circuit to fire. The amplifier can be reset by turning the remote power off and then on again. If the system shuts down because of a thermal overload condition, allow the amplifier to cool down before restarting. If the amplifier shutdown because of an input overload or speaker short circuit please be sure to correct these conditions before restarting the amplifier. -1 2-OHM OPERATION PYRAMID SERIES This unit was designe

Use #8 wire. 2. Connect the remote terminal to the remote output of the head unit using #14 wire. 3. Connect an empty fuse holder within 300mm (12") of the battery and run a #8 or larger high quality cable from this fuse to the amplifier location. 4. Make sure there is no fuse in the fuse holder. Then make the connection to the "BATT" connection on the amplifier. 5. If multiple amplifiers are being used, either run separate cables. (each with its own fuse at the battery) or a #0 or #2 cable from

the fuse protects the amplifier and your car’s electrical system from short circuit conditions. use these connectors to deliver power, ground and remote turn-on control to the amplifier. these terminals are 14K gold plated to guarantee high conductivity and minimum signal loss. 4 ch amp PB681X • PB881X PB681X PB881X output power @ 14.4v DC, 1KHz RMS Power @ 4 Ohms 35 Watts x 4 50 Watts x 4 RMS Power @ 2 Ohms 55 Watts x 4 60 Watts x 4 Maximum Power Output 250 Watts x 4 300 Watts x 4 frequency res

CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db0 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 POWERPROTECT REMOTE BASS BOOST(CH3/4) 4 CH floating ground connections from speaker terminals L R FRONTL RREAR ORANGE ORANGE ORANGE ORANGE BLACK BLACK BLACK BLACK PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time! CH 1/2 4 CH ha

CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db0 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 POWERPROTECT REMOTE BASS BOOST(CH3/4) head unit FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 HPF +18db0 35 400 Hz LPF 80 HPF 2.5k 2.5k Hz +18db0 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 FUL

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. 1 general features PB481X PB781X PB1281X PB681X/PB881X PB1881X features and specifications electrical connections PB481X/PB781X

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. Mark the location for the mounting screw holes by positioning the amp where you wish to install it and use a scribe (or one of the mounting screws) inserted in each of the mounting holes to mark the mounting surface. If the mounting surface is carpeted, measure t

use this control to match the outputs of your head unit to the amplifier. Starting with your head unit set at about the 2 o’clock position, increase the amp level control until distortion begins to occur, and reduce slightly from this point. when the crossover selector switch is in “low pass” mode, this control sets the upper frequency limit for audio program sent to the speakers. when the crossover selector switch is in “high pass” mode, this control sets the lower frequency limit for audio pro