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MTX Terminator TN400/4

4-channel car amplifier — 45 watts RMS x 4 at 4 ohms

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Our take on the MTX Terminator TN400/4

by Gabrielle Thorndyke
MTX

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 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 TN400/4 4-channel amplifier powers your speakers with 45 watts RMS per channel at 4 ohms, or you can drive a pair of speakers with 150 watts RMS in bridged mode. 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.

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Highlights:

  • 4-channel car amplifier
  • 45 watts RMS x 4 at 4 ohms (75 watts RMS x 4 at 2 ohms)
  • 150 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • selectable full, high- and low-pass filters (85 Hz, 18 dB per octave)
  • 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 and outputs
  • fuse rating: 25A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-1/4"W x 2-5/16"H x 10-3/8"D
  • warranty: 5 years (free repair or replacement for 2 years; prorated replacement for years 3 through 5)
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels) 45 x 4
Peak Power Output (Watts x Channels) 150 x 4
Power at 2 Ohms (Watts x Channels) 75 x 4
Bridged Power (Watts x Channels) 150 x 2
Minimum Impedance Bridged 4
Minimum Impedance Unbridged 2
Best Frequency Response 20-20k Hz
THD at Rated RMS Power 1%
Signal to Noise Ratio 78 dB
Input Voltage 14.4v
Features
Amplifier Class AB
Low-Pass Crossover Frequency 85 Hz
Low-Pass Slope (dB/octave) 18 dB
High-Pass Crossover Frequency 85 Hz
High-Pass Slope (dB/octave) 18 dB
Bass Boost No
Bass Boost Frequency N/A
Fan Cooled Yes
Fuse Rating 50
Speaker Level Inputs RCA
Preamp Outputs 1 pair
Width (inches) 10-3/8
Height (inches) 2-5/16
Depth (inches) 13-1/4
Parts Warranty 5 Years (3-5 Prorated)
Labor Warranty 5 Years (3-5 Prorated)
Product Research
What's in the box?

Download owner's manual

  • 4-Channel amplifier with two 25A ATO fuses installed in chassis
  • Four 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

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 open the box, verify contents, 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.

Features
Connections
Warranty

Features

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 TN400/4 under CEA-2006 regulations is rated at 45 Watts RMS x 4 channels with a 78dBA signal to noise ratio.

2-Ohm Stable: The MTX 4-channel amplifier is capable of handling load impedances down to 2-ohms. The amplifier is rated at 75 Watts RMS x 4 channels in 2 ohms with 1% THD.

Bridgeable: The MTX Audio 4-channel amplifier can be bridged down to two channels to output 150 Watts x 2-channels at 4 ohm.

Pure N-Channel MOSFET Design: The Terminator amplifier utilizes Pure N-Channel MOSFET technology for more linear speaker control, enhanced signal-to-noise ratio and more power. This design lets the audio signal travel through fewer parts making the output stage of the amplifier more efficient and giving you more usable power from the amp.

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.

Crossovers: The Terminator TN400/4 features independent Front and Rear high-pass and low-pass 18dB/octave, 85Hz crossovers. The crossovers can also be set to full-range.

Connections

Power/Ground/Turn-On Connections: The TN400/4 features 0.5" wide Power, Ground, and Turn-On Lead screw terminals. These terminals will handle up to 4 AWG wire.

Front/Rear RCA Inputs: The Front and Rear RCA type line-level inputs have independent gain (Input Sensitivity) controls. The Input Sensitivity controls will accept an input signal of 200mV to 4.0 Volts.

Preamp Output: The amplifier features a stereo preamp output which is summed between the amplifier's front and rear channels that allow you to connect an additional amplifier to your car audio system without running RCA cable back to your headunit.

Speaker Outputs: The amplifier is equipped with four pairs of speaker terminals for connection of four pairs of speakers. The speaker terminals are 0.3125" screw terminals which will accommodate 12 to 8 AWG speaker wire.

Smart-Engage Speaker Level Input: The Terminator TN400/4 comes with a set 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.

Fuse: The amplifier is equipped with two 25-Amp fuses.

Warranty

5 Year Warranty Terms: This product carries a 5-Year Prorated Warranty with the following terms:

  • Years 1-2: Products found to be defective in materials or workmanship during the first two years will be, at Mitek's option, repaired or replaced by Mitek at no charge. The warranty period does not renew, but continues on from the original date of purchase.
  • Years 3-5: The purchase price of an item which becomes defective after the first two years and prior to the end of the warranty period will be prorated and credited toward the purchase of a new MTX product. The amount of proration is determined by dividing the original purchase price by the number of months in the warranty period (60), then multiplying the result by the number of months remaining in the warranty period.
 
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MTX Terminator TN400/4 Reviews

Average Customer Review:

9 people say:

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4 out of 5

MTX Terminator TN/400/4

Written By DaneB, HORN LAKE,MS on Sunday, June 29, 2014
Crutchfield Customer Review (What's this?)
 
GREAT ITEM, AFFORTABLE PRICE,
Pros:
MAKE MY MTX SPEAKERS SOUND GREAT!
Cons:
NONE
Was this review helpful?    Yes | No
 
5 out of 5

MTX Terminator tn400

Written By juanc2010, Mayaguez PR on Friday, February 07, 2014
Crutchfield Customer Review (What's this?)
 
Great item, fast shipping!!!
Was this review helpful?    Yes | No
 
5 out of 5

MTX TERMINATOR TN400/4

Written By MACKY, SORRENTO, LA. on Saturday, November 16, 2013
Crutchfield Customer Review (What's this?)
 
Made my good sounding speakers sound great! What a great price also. Buy this unit you will not regret it.
Pros:
$, easy to install, great improvment.
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Good product for the money

Written By Sean, Maryland on Monday, October 07, 2013
Crutchfield Customer Review (What's this?)
 
This product has an excellent warranty and a good price. The installation is relatively easy as there is no need to attach a pre-amp or a remote power feed. I have two MTX and they are both excellent performers to date.
Pros:
Ease of installation -
Cons:
None so far
Was this review helpful?    Yes | No
 
5 out of 5

MTX Terminator TN400/4

Written By Anonymous, charleston il on Saturday, March 16, 2013
Crutchfield Customer Review (What's this?)
 
I instaled this amp to run 2 6x9's and two 5" door speakers. There is plenty of power for those 4 speakers mabey two much. It installed very easy and was labled nicely. i would recomend this amp to anyone looking for a less expensive amp.
Was this review helpful?    Yes | No
 
5 out of 5

Reasonable price!

Written By Harry, Washington DC on Monday, March 11, 2013
Crutchfield Customer Review (What's this?)
 
The MTX TN400/4 was my choice of amp to use for my front and rear speakers for it obviously being a four-channel amplifier with plenty of power at a reasonable price.
Was this review helpful?    Yes | No
 
4 out of 5

MTX Terminator TN400/4

Written By kawika, Hawaii,Hi on Sunday, November 21, 2010
Crutchfield Customer Review (What's this?)
 
I got this amp hooked up to 2 6 1/2& 2 6x9's in the rear an 2 6 1/2 &2 1' tweeters in the
front and it screams 1 of the best amps i ever ever wen buy mtx is da best
4 out of 5 people found this helpful
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4 out of 5

2 12" Kicker Comps

Written By LIVIN LOUD 313, Michigan on Saturday, August 21, 2010
 
I got this amp a few years back along with 2 12" Kicker Comps for my first system and i had it in a 91 caprice.
This thing was LOUD.
I ended up running 3 12" Kicker Comps off of this as well as a 15".
I finally smoked it when my battery wire disconnected from my compasitor and grounded out the amp and smoke started pouring out of it. I tried fixing it but i cant find the schematic diagram for it at all.
Anyways, you can run subs off of it and they will sound nice.
Just turn the gain up, put the crossovers to LP and your good to go.
1 out of 5 people found this helpful
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4 out of 5

Clean power

Written By BIG E, Davenport IA on Saturday, October 25, 2008
 
I got this amp to run four 6.5 speakers it's got the power! The only thing is there is no bass boost so don't buy this for subs, also this amp is steel on the outside and a the heatsink is in the inside that the fan blows on. I have run this amp at full gain and it won't get hot! Also a note the crossover is set to 85hz highpass or lowpass.Or you can set it at full.
67 out of 75 people found this helpful
Was this review helpful?    Yes | No
 

1 question already asked

Is this overkill for a single MTX T4500? Or just right [ anonymous  Dec 25, 2013 ]
1 answer
  • Thanks for your question. For information on choosing the best amp for your subwoofers I would recommend reaching out to an Advisor by phone or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Jeff Staff  Dec 26, 2013 ]

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For a more in-depth review and enhanced detailed information on the MTX Terminator TN400/4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_236TN4004/MTX-Terminator-TN400-4.html ).