features and specifications
4 ch amp PB-638GX • PB-1038GX
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. Starting with your head unit set at about the 2 o’clock position, increase the amp level controls until distortion begins to occur, and reduce slightly from this point.
dual low pass frequency controls when one or both of the crossover selector switches is in “low pass” mode, one can set the upper frequency limit for audio program sent to the speakers.
dual high pass frequency controls when the one or both of crossover selector switch is in “high pass” mode, one can set the lower frequency limit for audio program sent to the speakers.
CH 3/4 Remote Bass Boost Plug in the Remote Bass Boost Control wire in here.
dual bass boost level controls this control permits adjustment of the bass level up to an increase of approximately 18 dB in either or both pairs of channels.
output power @ 14.4v DC, 1KHz |
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RMS Power @ 4 Ohms | 35 Watts x 4 | 75 Watts x 4 | |||||||
RMS Power @ 2 Ohms | 65 Watts x 4 | 125 Watts x 4 | |||||||
Maximum Power Output | 400 Watts x 4 | 1000 Watts x 4 | |||||||
frequency response |
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| 15 |
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input impedance |
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low level inputs |
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| 10K Ohms |
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high level inputs |
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| 100 Ohms |
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input sensitivity |
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| 9 | |||||
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low level inputs |
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| 250mV |
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high level inputs |
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| 2.5V |
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power supply voltage |
| 14.4V DC Neg. Ground |
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low level inputs this amp features
high level inputs if your car stereo lacks
power LED this indicator is illuminated when power is applied.
protection LED this indicator is illuminated when
power fuse the fuse protects the amplifier and your car’s electrical system from short circuit conditions.
power terminals use these connectors to deliver power, ground and remote
speaker connections these terminals are 14K gold plated to guarantee high conductivity and minimum signal loss.
matching speaker impedance |
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stereo mode |
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bridged mode |
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maximum current draw | 20 A |
| 40 A | |
dimensions (W x H x L) |
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mm | 274 x 61 x 305 | 274 x 61 x 432 | ||
inches | 10.5 x 2.4 x 12 | 10.5 x 2.4 x 17 | ||