I was told by the original owner that it is in working condition,  I however have not confirmed this myself.  Should be no problems.

Has some cosmetic scratches

MTX AUDIO
PURE N-CHANNEL DESIGN
THUNDER 4244
4 CHANNEL AMP

The MTX Thunder4244 4-channel amplifier uses a "pure N-channel" design with a MOSFET power supply for impressive power and outstanding performance. This efficient circuitry turns most of the available energy into usable wattage, rather than the heat generated by most amps.

Intelligent Surface Mount Technology gives the amplifier superior resistance to vibration, for long-term reliability. Speaker-level inputs feature SmartEngage, which turns the amp on when it gets signal from the receiver.

      Details:

  • 2-, 3-, or 4-channel output
  • Tri-way capable (Tri-Way crossover required)
  • 60 watts x 4 at 2 ohms
  • 120 watts x 2 in bridged mode
  • Requires 4-gauge power and ground leads — wiring and hardware not included with amplifier
  • PWM MOSFET switching power supply
  • Intelligent Surface Mount Technology for cleaner sound
  • Front selectable 85 Hz high-pass crossover, 18 dB/octave
  • Rear selectable 85 Hz high-pass/low-pass crossover, 18 dB/octave
  • Preamp outputs

        Dimensions:   9-5/16"W x 2-1/8"H x 11-1/2"D