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Earthquake Sound XJ-300ST Compact 320W RMS 8 Ohms Class J Stereo amplifier

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Earthquake Sound XJ-300ST Compact 320W RMS 8 Ohms Class J Stereo amplifier

It has been said time and time again that “size matters”. And in todays crowded and cluttered world the saying could never be truer. That is why Earthquake Sound has updated the best-selling XJ-300FR amplifier to have a 12V trigger. The XJ-300ST maintains characteristics of the small unimposing, connectable design while still packing all the power and flexibility that made the XJ-300FR so popular.

Keeping flexibility and spatial convenience in mind, Earthquake has kept their patented EQ Interlock design so that two amplifiers can be clicked together resulting in a 4-channel amplifier while only using 1U of rack space. The small size of the XJ-300ST is made even more convenient by its unbelievable amount of cool running power. Approaching 99% efficiency the XJ amp never gets hot, allowing it to be placed in tight rack surrounded by other components.


  • Compact size: 8 ½ in (W) x 8 in (D) x 1 7⁄8 in (H)
  • Wall or rack mountable
  • Class “J” Stereo Modular design
  • Auto Signal/Music Sensing
  • Built in room corrections and 0 - 180° phase adjustments
  • RCA input
  • +12V Trigger
  • Volume control
  • 50 – 160Hz built in crossover
  • 110V/220V Selectable
  • Compatible with optional RM-300FR long ear extension bracket
  • Technology Integrator's 2016 Impact! Awards Finalist


  • 2 X 110 WRMS (8-Ohm Stereo)
  • 2 x 170 WRMS (4-Ohm Stereo)
  • 170 WRMS @ 110 volt AC (8-Ohm Mono Bridged)
  • 210 WRMS @ 230 volt AC (8-Ohm Mono Bridged)
  • 320 W-IHF (dynamic power) @ 230 volt AC (4-Ohm Mono Bridged)
  • Wall or rack mountable
  • Class “J” Stereo Modular design
  • RCA inputs
  • +12V Trigger
  • Compact size
  • Volume control
  • Finish: Flat Black
  • Weight: 1.7 kg
  • Comes with 4 detachable rack ears + 1 connector bracket (for connecting multiple amplifiers)
  • OPTIONAL Long Ears extension brackets available
  • Frequency Response: 20-20kHz
  • High Pass Filter: 15 HZ
  • Phase infinitely variable: 0 to 180 degr.
  • Crossover: 50Hz - 160Hz
  • Signal To Noise: 101 dB
  • Load Impedance: 2 Ohms or greater
  • THD: 0.08%
  • Damping Factor:> 1400
  • Power Line Voltage: 110-220 ~ AC50/60Hz