So much power, such a small price tag — that's the beauty of the US acoustics USX-2050 amplifier! In addition to putting out plenty of power, the USX-2050 also gives you continuously variable high-pass crossover (65-4500 Hz at 12 dB/octave) for precise tune-tweaking capability, and low-pass crossover (variable 40-460 Hz at 24 dB/octave) for firm, tight bass.


  • stereo or bridged mono output
  • Tri-way capable (Tri-Way crossover required)
  • 80 watts x 2 at 2 ohms
  • 160 watts x 1 in bridged mode
  • requires 10-gauge power and ground leads — wiring and hardware not included with amplifier
  • variable high-pass (65-4500 Hz, 12 dB/octave) and low-pass (40-460 Hz, 24 dB/octave) crossovers
  • anti-thump circuit
  • thermal, short-circuit, and power/ground reversal protection
  • speaker-level inputs
  • preamp outputs
  • blue power light strip
  • 3-year warranty

US acoustics USX-2050 Reviews

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Great Value, Solid Performer

Written By Backroad Bob, The Left Coast on Wednesday, July 16, 2014

Crutchfield Customer Review (What's this?)

I've been running this little power house for twelve years now in bridged mode and it's still just like new. The fadelity and power are more than sufficient for the average discerning listener.

Pros: Lots of features. Rock Solid Build. Very Clean Output. Has survived a dozen years in my off-highway 4x4.

Cons: Not sold anymore. Too bad.

Hands-on research

What's in the box?

Download owner's manual

  • Blue amplifier with chrome trim and a 20-amp blade fuse in chassis
  • 1 Spare 20-amp blade fuse
  • Speaker level input harness
  • 4 Plastic isolation mounting feet
  • 4 Self-tapping screws
  • 4 Flat washers
  • Manual
  • Warranty registration card with survey.

Product Research

Special Features
Additional Specs
Warranty Note

Special Features

True Line Output: The gold-plated RCA outputs on this amplifier are able to send flat, lowpass or highpass signals to a second amplifier.  If the internal crossover is switched off (full range), the line outputs will pass a full range signal.  When the built-in crossover is set for highpass operation, the line outputs provide a lowpass signal; when the built in crossover is set for lowpass operation, the line outputs provide a highpass signal. 

Power Supply and Output Devices: High current MOSFET devices are used in the power supply and output stages of this amplifier.

Anti-thump Circuitry: There is a time delay turn-on with opto-coupled muting circuits for quiet, thump-free operation.

High Speed, Audio-grade Components: High speed, audio-grade components are used in all low level stages to help ensure signal integrity.

Protection Circuitry: Reverse polarity, thermal and short circuit protection circuits are used to help protect the amplifier from damage and ensure reliable operation.

LED Condition Indicators: A green power LED and a red protection LED are use to report the amp's operating status.

Blue Light Strip: There is a blue light strip on the top of the amplifier. The light strip illuminates when the unit is on.


Crossover Selector: The crossover selector switch setting affects the signal amplified by this unit and the signal passed by the RCA line outputs. The switch may be set for full-range speaker output with full-range line output, highpass speaker output with lowpass line output or lowpass speaker output with highpass line output.

Level Control: The level control is a variable gain control with a range of 110mV to 8.8V.

Lowpass Frequency Control: This control is used to set the lowpass frequency for this amplifier and the RCA line outputs; the control is variable from 40-460Hz (24 dB/octave slope).

Highpass Frequency Control: This control is used to set the highpass frequency for this amplifier and the RCA line outputs; the control is variable from 65 Hz to 4.5kHz (12 dB/octave slope)



  • +12V, Remote Turn-on and Ground Connections: gold-plated screw terminals; each terminal is 0.335" wide
  • Left and Right Speakers Outputs: gold-plated screw terminals (R- and L+ connections are used for bridged mode); each terminal is 0.335" wide
  • High Level Input: a 3-pin jack used with the supplied Molex harness for speaker level input
  • Line In Connections: two gold-plated RCA jacks
  • Line out Connections: two gold-plated RCA jacks

Additional Specs

Best Frequency Response: 10Hz to 30kHz, -0.5dB

Fuse Rating and Type: 20 amp blade fuse

Channel Separation: 85 dB

Warranty Note

Warranty: Amplifiers made before January 2001 carry a 1 year warranty. Units made during, and after, January 2001 carry a 3 year parts and labor warranty. All the units currently being sold by Crutchfield were manufactured after January 2001, so they are covered by the 3 year parts and labor warranty. The production date of each amplifier can be determined using the serial number; the first digit in the serial number indicates the year in which the amplifier was made. If the first digit in the serial number is "1", or higher, the amplifier carries a 3 year warranty; if the first digit in the serial number is a "0", the amplifier carries a 1 year warranty.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.