Skip Navigation

MTX Terminator amplifers make it easy to create a sweet-looking setup — these gloss-black amps share the same size and shape, so they'll look great in a multi-amp installation. These amps deliver plenty of power to drive your speakers and subs, and you'll find all connections on one side of the amp so your wiring stays organized.

The TN250/1 1-channel amplifier powers your subwoofer with 100 watts RMS per channel at 4 ohms. The Active Fan Cooling system uses a variable-speed internal fan that increases its speed as you turn the volume up, then slows when you turn your volume down. This system keeps the amp running cool in every situation, while eliminating the need for a heavy heat sink. The Smart Engage feature turns the amp on automatically when it senses a signal through the speaker-level inputs, so you don't have to run a turn-on lead to your receiver.

Product Highlights:

  • mono subwoofer car amplifier
  • 100 watts RMS x 1 at 4 ohms (200 watts RMS x 1 at 2 ohms)
  • low-pass filter (85 Hz, 18 dB per octave)
  • bass boost (0, 6 or 12dB at 40 Hz)
  • Active Fan Cooling with automatic variable fan speed
  • Smart Engage turns on amp when signal arrives through the speaker-level inputs
  • CEA-2006 compliant
  • preamp inputs
  • fuse rating: 25A x 1
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-1/16"W x 2-1/4"H x 10-3/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

MTX Terminator TN250/1 Reviews

Average Customer Review:

5 Reviews

Awesome Bang for the buck!

Written by: Jonathan from Queen Creek Az on July 19, 2009

I had the Terminator installed in my car. it runnes cool and Keeps my Sub Kicking hard. I have a 12 Comp Kicker in the trunk and it the amp never overheats or gives me any problems. Sounds great and looks Great. Overall a Good Buy!



Good Unit but huge

Written by: Mitch from Delaware on July 8, 2009

Pretty impressed with this unit. It has great heat dissipation im sure the fan helps. I have these running 2x MTX Thunder 4500's (10''). Sounds great and bumps hard. Only complaint is that its huge as far as amps go. If I would have known how large it was I would have bought a physically smaller model. However for the money its great. Oh other complaint is that the instructions are kinda lame.



MTX Terminator TN250/1

Written by: bob from east coast on May 8, 2009

Crutchfield Customer Review (What's this?)

I decided to buy this amp because it was one of the only ones in its price range that solved two of my issues.
1) it has a built in cooling fan which was great for me cause my amp is in the trunk and the summer can be hot.
2) Major kick with just two 8" 4 ohm subs delivers 200 watts of power. Others amps with this kind of power cost much more and the install was one of the easiest I've ever done.
I did have the amp short out and blow a fuse after about 6-8 months. Forgot to check output leads with test meter instead of using my subs.Amp shorted and toasted those puppies. Learned my lesson. Tech support was a great help in verifying my tests that the amp malfunctioned.
MTX wanted me to pay to have the warranty covered. Called crutchfield and they just exchanged it with no problem. Had the replacement amp in less than 4 days!! Off and kickin again.




Written by: Carl from West Chester, PA on February 14, 2009

Right now it powers a 8" infinity subwoofer in my 2004 Dodge Durango Hemi. I plan to replace the 8" subwoofer with one from Crutchfield soon.

This unit runs very cool with the fan and never gets hot to the touch. The fan is very quiet as well.

Overall, I'd highly recommend this amp if you're running small size subs or don't need a whole lot of power. One other thought; make sure you get
atleast 8 gauge power and ground cables for this subwoofer.



MTX Terminator TN250/1

Written by: BIG E from Davenport IA on October 25, 2008

I'm runing one 10in' bazooka tube and it's unreal how powerful this amp is. It's at full gain and it just gets warm and not hot. Would like to see it run in 2ohm load. Just wish it had a wired bass knob. Then I would have gave it 5 stars. Also this amp is made of steel on the the outside and the heatsink is in the inside that the fan blow's on.



Hands-on research

What's in the box?

Download owner's manual

  • Mono-block amplifier with 25A fuse installed in chassis
  • Two 10' Speaker level to RCA adapters (each have on RCA connector on one end and bare tinned wire on other end)
  • MTX Warranty Statement/Wiring diagram
  • Amplifier Performance Certificate

Product Research



CEA-2006 Compliant: CEA-2006 is a new system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured into a 4-ohm load, with 1% or less Total Harmonic Distortion (THD) plus noise, and at a frequency range of 20 Hz to 20,000 Hz when applicable. Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. The MTX Terminator TN250/1 under CEA-2006 regulations is rated at 100 Watts RMS x 1 channel with a 73dBA signal to noise ratio.

2-Ohm Stable: The MTX mono-amplifier is capable of handling load impedances down to 2-ohms. The amplifier is rated at 200 Watts RMS x 1 channel in 2 ohms with 1% THD.

Mono-Block Amplifier: The MTX Terminator TN250/1 is designed with specific features to power your subwoofer or subwoofers with a frequency range between 20 to 85 Hz. This amplifier is not designed to power a full-range speaker.

Class-D Design: The TN250/1 is a Class D mono-block amplifier, which uses digital switching to amplify audio signals. This design results in high efficiency and less heat.

Active Fan Cooling: Rather than weighing the amplifier down with heavy aluminum heat sinks, the Terminator amplifier is cooled using a variable speed internal fan. The increasing output of the amplifier engages the fan to automatically increase its speed allowing more cool air to enter the amplifier. This keeps the amplifier performing at its peak level longer and prevent the amplifier from having to into thermal shutdown due to overheating. The fan will automatically slow down when the amplifier's output is decreased.


Crossover: The Terminator TN250/1 features a fixed 18dB/octave, 85Hz low-pass crossover.

Bass Boost: The MTX TN250/1 features a 40Hz Bass Boost which can be set to 0, 6, or 12 dB.


Power/Ground/Turn-On Connections: The TN250/1 features 0.5" Power, Ground, and Turn-On Lead screw terminals. These terminals will handle up to 4 AWG wire.

RCA Inputs: The pair of RCA type line-level inputs have a gain (Input Sensitivity) control. The Input Sensitivity control will accept an input signal of 200mV to 4.0 Volts.

Smart-Engage Speaker Level Input: The Terminator TN250/1 comes with a pair of speaker level input harnesses. This feature makes it easier to add an amplifier to a factory radio or to a receiver with no preamp outputs. When using the speaker-level inputs, the amp automatically turns on when it senses signal from the head unit, eliminating the need for a remote turn-on connection. In many cases, this feature will allow you to install the amplifier without removing your radio.

Parallel Speaker Outputs: The amplifier is equipped with two pairs of  speaker terminals for an easy parallel subwoofer connection. The speaker terminals are 0.3125" screw terminals which will accommodate 12 to 8 AWG speaker wire.

Fuse: The amplifier is equipped with a 25-AMP fuse.

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.