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  3. Discontinued U.S. acoustics Car Audio & Electronics
  4. Discontinued U.S. acoustics Car Amplifiers
  5. Discontinued U.S. acoustics 4-Channel Amplifiers

Discontinued U.S. acoustics 4-Channel Amplifiers

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Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.

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You are currently viewing discontinued products.

U.S. acoustics USG4080 ( USG 4080 )

USG4080 big DISCONTINUED
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U.S. acoustics USG4080 ( USG 4080 )

** FREE SHIPPING WITHIN THE CONTINENTAL USA **
High Current Bridgable MOSFET 4-channel Power Amplifier

** FREE SHIPPING WITHIN THE CONTINENTAL USA **
High Current Bridgable MOSFET 4-channel Power Amplifier

U.S. Acoustics USC4085

USC4085 big DISCONTINUED
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U.S. Acoustics USC4085

CEA-2006 Comlpliant • 530W RMS power amplifier • 135W x 4 @ 2 Ohm RMS • 85W x 4 @ 4 Ohm RMS • Gold plated RCA connectors • True Line Output • 0-18dB Bass Boost • Built in crossovers • High-current MOSFET output stages

CEA-2006 Comlpliant • 530W RMS power amplifier • 135W x 4 @ 2 Ohm RMS • 85W x 4 @ 4 Ohm RMS • Gold plated RCA connectors • True Line Output • 0-18dB Bass Boost • Built in crossovers • High-current MOSFET output stages

U.S. acoustics USG4125 ( USG 4125 )

USG4125 big DISCONTINUED
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U.S. acoustics USG4125 ( USG 4125 )

** FREE SHIPPING WITHIN THE CONTINENTAL USA **
High Current Bridgable MOSFET 4-channel Power Amplifier

** FREE SHIPPING WITHIN THE CONTINENTAL USA **
High Current Bridgable MOSFET 4-channel Power Amplifier

U.S. Acoustics USC4065

USC4065 big DISCONTINUED
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U.S. Acoustics USC4065

CEA-2006 Comlpliant • 400W RMS power amplifier • 115W x 4 @ 2 Ohm RMS • 65W x 4 @ 4 Ohm RMS • Gold plated RCA connectors • True Line Output • 0-18dB Bass Boost • Built in crossovers • High-current MOSFET output stages

CEA-2006 Comlpliant • 400W RMS power amplifier • 115W x 4 @ 2 Ohm RMS • 65W x 4 @ 4 Ohm RMS • Gold plated RCA connectors • True Line Output • 0-18dB Bass Boost • Built in crossovers • High-current MOSFET output stages

 
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