MTX Jackhammer Series 300W 4 Channel Amplifier - JH300.4

Model #:JH300.4

High Fidelity Amplification

The JH3004 four channel amplifier powers high wattage speaker systems with headroom to spare, all without added distortion or over-heating during long hours of loud play.


Easy Access Controls

The JH3004 is a high fidelity amplifier designed to drive high powered full range speakers. The top panel includes controls for both front and rear full range speakers including gain, crossover and frequency adjustment. The front panel location allows for easy adjustment after the unit is installed. This layout is simple and elegant, giving the JH3004 a sophisticated look with the convenience of easy accessibility.


Only What You Need

The JH3004 has the functionality to up to four full range speakers. The input section features high quality RCAs (front and rear) for easy connection to after market head units or processors. The Input Level selection is either Pre or Spk In so it can also be used with factory radios that don't have RCA outputs. The Auto Turn On feature is selectable, enabling the unit to turn on when it senses signal, eliminating the need to run a remote wire, or it can be turned on using a remote wire, the choice is yours. The unit can also be used in either 4-channel or 2-channel mode depending on the Input Mode selection.


High Quality Power and Speaker Connections

The JH3004 can accept up to a standard 4-gauge power and ground wire for optimal performance. The speaker terminals can accept up to 12-gauge speaker. The speaker connection terminal has two sets of positive and negative terminals for easy wiring, the JH3004 can play loads down to 2Ω. Both sets of connectors use set screw style fittings that ensure proper connection and continual signal transfer.



  • Top Mount Controls - Provides for Easy Adjustment of the Amplifier Once Installed
  • Variable Crossovers - Allow Fine Tuning Your System Output
  • Selectable Turn On Input - Allows the Use of a Remote Turn On Signal or Audio Signal to Turn On the Amplifier
  • Selectable Input Signal - Allows You to use traditional RCA Signals or Tie Directly to Factory Speaker Outputs
Warranty Period24 months from date of purchase
Depth11.14" (283mm)
Width7.61" (193.4mm)
Maximum Input Signal10V
Height2.57" (65.2mm)
High Pass Filter40Hz to 250Hz, 12dB/Oct
Crossover40Hz to 250Hz, 12dB/Oct
Frequency Response20Hz to 20kHz
Signal to Noise Ratio60dB
2Ω RMS Power Output90W x 4 Channel
4Ω Bridged180W x 2 Channel
4Ω RMS Power Output60W X 4 Channel
TopologyClass AB

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