Page 3 - table of contents
1 mono input connections PB-738GX/PB-1838GX 13 stereo input connections PB-738GX/PB-1838GX 12 speaker connections PB-238GX/PB-638GX/PB-1038GX table of contents mounting and installation 23 protection circuitry and troubleshooting 24 16-17 18 20 21-22 19 speaker connections PB-738GX/PB-1838GX high le...
Page 4 - general features
· 400 Watts x 4 Output · 800W x 2 Bridged Output (400W x 2 + 800W x 1) · Dual Variable Hi/Lo Electronic Crossover Network · Dual Variable Bass Boost (0 - +18 dB @ 60Hz) · Variable Input Level (Gain) Control · Remote Turn On/Off · Gold Plated RCA Inputs · High Level MOLEX Inputs · Power ON LED Indica...
Page 6 - features and controls
4 features and controls speaker connections power terminals power fuse 4 ch amp PB-238GX high level inputs input level control low level inputs high level inputs input level control low level inputs power LED POWER LOW IN HI IN CH2 CH1 + - - + MIN MAX LEVEL CH 2 CH 1 LOW IN CH 4 CH 3 MIN MAX LEVEL H...
Page 7 - features and specifications
5 input level control low level inputs high level inputs power LED power fuse power terminals speaker connections 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, increasethe amp level control until distortion ...
Page 12 - electrical connections
10 to remote turn-on +12V head unit 12V battery electrical connections 2 ch amp PB-738GX • PB-1838GX GROUND FUSE BRIDGED - + - + - + L R +12V BATT REM
Page 14 - low level inputs; using; high level inputs; stereo input connections
12 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 Y Adaptors L/R Audio Outputs from speaker terminals L L R R head unit stereo input connections 2 ch amp P B - 7 3 8 GX • P B - 1 8 3 8 G X LEVEL RE...
Page 15 - mono input connections
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 head unit wiring harness wiring harness To a second amplifier R R L L from speaker terminals 13 mono input connection...
Page 16 - CH input connections using; /4 channel input connections
4 CH input connections using low level inputs 2 CH input connections using low level inputs Y adaptors L R head unit L/R REAR Audio Outputs L/R FRONT Audio Outputs 14 2/4 channel input connections 4 ch amp PB-238GX POWER LOW IN HI IN CH2 CH1 + - - + MIN MAX LEVEL CH 2 CH 1 LOW IN CH 4 CH 3 MIN MAX L...
Page 17 - CH floating ground connections; high level
4 CH floating ground connections from speaker terminals L R FRONT L R REAR ORANGE ORANGE ORANGE ORANGE BLACK BLACK BLACK BLACK PLEASE NOTE! If using high level inputs,do not use the low level RCA inputs atthe same time! CH 1/2 4 CH harness wiring for common ground connections from speaker terminals ...
Page 18 - CH Stereo input connections using; Stereo
4 CH Stereo input connections using low level inputs 2 CH Stereo input connections using low level inputs Y adaptors R L head unit 16 L/R REAR Audio Outputs L/R FRONT Audio Outputs Stereo input connections 4 ch amp PB-638GX • PB-1038GX 4 CHANNEL MOSFET AMPLIFIER FREQ. CH 3 LOW IN LEVEL MIN MAX CH 4 ...
Page 19 - high level Stereo; c h a m p P B - 6 3 8 G X • P B - 1 0 3 8 G X
4 CH floating ground connections 17 from speaker terminals L R FRONT L R REAR ORANGE ORANGE ORANGE ORANGE BLACK BLACK BLACK BLACK PLEASE NOTE! If using high level inputs,do not use the low level RCA inputs atthe same time! CH 1/2 4 CH harness wiring for common ground connections from speaker termina...
Page 20 - CH mono input connections using; mono
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 head unit LEFT REAR Audio Outputs RIGHT REAR Audio Outputs 18 mono input connections 4 ch amp PB-638GX • PB-1038GX 4 CHANNEL MOSFET ...
Page 21 - high level mono
4 CH Common 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 from speaker terminals CH 1/2 CH 3/4 R L ORANGE...
Page 22 - Stereo Output Mode; speaker connections
Stereo Output Mode speaker MINIMUM SPEAKER IMPEDANCE 4 OHMS! RIGHT speaker L EFT speaker 20 speaker connections 2 ch amp • P B - 7 3 8 GX • P B - 1 8 3 8 G X GROUND FUSE BRIDGED - + - + - + L R +12V BATT REM GROUND FUSE BRIDGED - + - + - + L R +12V BATT REM
Page 23 - CH Output Mode; c h a m p P B - 2 3 8 G X • P B - 6 3 8 GX • P B - 1 0 3 8 G X
21 4 CH Output Mode Bridged Dual Mono Output Mode (PB-238GX WITHOUT) MINIMUM SPEAKER IMPEDANCE 4 OHMS! speakers L R REAR speakers FRONT speakers L R R L speaker connections 4 c h a m p P B - 2 3 8 G X • P B - 6 3 8 GX • P B - 1 0 3 8 G X BRIDGED + - - + - + - + CH3 CH4 GROUND +12V BATT REM BRIDGED F...
Page 24 - CH Bridged Output Mode with Subwoofer Output
2 CH Bridged Output Mode with Subwoofer Output MINIMUM SPEAKER IMPEDANCE 4 OHMS! SPEAKERS R L SUBWOOFER 22 speaker connections 4 c h a m p P B - 6 3 8 G X • P B - 1 0 3 8 G X BRIDGED + - - + - + - + CH3 CH4 GROUND +12V BATT REM BRIDGED FUSE - + - + CH1 CH2
Page 25 - mounting
23 mounting and installation 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...
Page 26 - protection
The built-in protection circuitry in the Pyramid Royal Blue Series 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 ofthese conditions, the Protection LED will beilluminate...
