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MTX Audio JackHammer JH300

600W Max, Class D Monoblock Jack Hammer Series Amplifier

Discontinued
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This item has been discontinued

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MTX Audio JackHammer JH300

600W Max, Class D Monoblock Jack Hammer Series Amplifier

$149.99

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NVX XKIT82 8-Gauge Wiring Kit

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Constant Pounding. Active Cooling.

With a name like JackHammer you have to be able to deliver power. MTX Audio has designed their JackHammer series of amplifiers to not only be able to deliver constant power but also stay cool with their integrated Active Fan Cooling technology. This helps the MTX JH300 Amplifier put out impressive power ratings without getting hot and shutting down. The harder the amp is being driven, the harder the fan will work to make sure each component doesn't heat too much with it's active cooling.

JackHammer amplifiers are built into a gloss black finish chassis to maintain style along with it's unique output. With tuning adjustments to ensure you'll get only the best frequencies from your sound system, this amplifier will be sure to compliment any compatible audio system.

With the JackStands you can mount each JackHammer amplifier on top of each other to achieve a compact, integrated audio system that maintains consistency. The JH300 Monoblock amplifier is sure pack a huge punch in your vehicle.

Authorized MTX Dealer
  • JackHammer Series Class D Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 200 watts x 1 chan.
    • 2 ohms: 300 watts x 1 chan.
  • Max power output: 600 watts x 1 chan.
  • Adaptive class D technology
  • Wired remote bass level control included
  • LED power, overheat, and voltage indicators
  • Tuned Bass EQ (0-12 dB bass boost at 40 Hz)
  • JackStands are included, which are mounting platforms that enables a user to mount up to three amplifiers
  • Gain control
  • Built-in active fan cooling technology adjusts fan speed according to the usage of the amplifier
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable low-pass filter (40-5000 Hz, 24 dB/octave)
  • Subsonic filter (20-50 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-200 Hz
  • Dimensions: 12-1/8"L x 8"W x 2-3/8"H
  • 8-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 1-year Manufacturer’s warranty
Read about the JH300 in our blog.

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
200 watts x 1 channels
RMS Power @ 2 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
300 watts x 1 channels
RMS Power @ 1 ohm
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 1 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
Not Stable

Amplifier Specifications

Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
1 - Mono
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

600 watts
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

300 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
8 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
1%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-Pass (LP)
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

40 - 5000 Hz
Subsonic Filter
Allows you to block (filter) ultra-low frequencies that your subs cannot reproduce.
20 - 50 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
75 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 12 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Yes
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
Yes
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
35A x 1 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
83%
4 Star
17%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.8
Features
4.8
Design
4.7
Usability
4.8
Nate

Brookfield, WI

Overall
Durability
Value
Features
Design
Usability
Awesome amp

September 29, 2010

This amp hits hard for only 600w. I got it running my 2 kicker 12" subs

9 of 10 found this helpful

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Ken

wichita, KS

Overall
Durability
Value
Features
Design
Usability
Awesome Deal

December 8, 2009

This is a very good buy for the money. I purchased it to push to 12 inch JL subs. Trust me, its all the power you need.

8 of 9 found this helpful

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Ramiro

Aurora, IL

Overall
Durability
Value
Features
Design
Usability
Very loud subs!!!!!!!!

December 28, 2009

I bought these subs thinking that they were going to be ok but they turn out to be great super good sound and they are loud but not too loud like other subs. you cant go wrong if you want to add more bass to your car but not over do it, to the point where you cant hear your self think.

8 of 10 found this helpful

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james

Dansville, NY

Overall
Durability
Value
Features
Design
Usability
Easy to install works great low profile

January 3, 2011

Easy to install works great low profile

6 of 7 found this helpful

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Nate

Brookfield, WI

Overall
Durability
Value
Features
Design
Usability
Beastly Amp

September 23, 2010

Have this amp running my 2 12" Kicker Comps and it kicks harder than you would think a 600w mono amp would.

7 of 9 found this helpful

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Matthew

Annandale, VA

Overall
Durability
Value
Features
Design
Usability
Overpowered

August 1, 2010

I got this powering my JL 12w3 and it is sick. I don't even have the amp up all the way and it shakes my car. I could probably power 2 of these JL's with this bad boy.

6 of 7 found this helpful

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David

Waco, TX

Overall
Durability
Value
Features
Design
Usability
Works like a charm!

February 3, 2011

Installed this amp myself. Running 2 12" Kicker Comps in a 2002 Chevy Ext. Cab. They sound amazing with this amp. This amp produces very clean distortion-free power. I have the gain set about 3/4. The internal fan keeps the amp cool to the touch and you can't hear it running unless your ear is close to the amp. Pros, looks great, sounds great, bass control knob is def. a plus, the controls are very easy and user-friendly, the price can't be beat. The JH300 is easy to install and the allen key screws make for a tight, neat connection. I'm very impressed with it.

5 of 6 found this helpful

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Garrett

Monticello, AR

Overall
Durability
Value
Features
Design
Usability
Awesome Ampp!

November 16, 2010

It is an awesome amp! It powers my two twelves and makes them beat hard, I mean HARD!!! The built in fan works great and the terminals work great = the best amp ive bought

6 of 8 found this helpful

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Jay

Beach, ND

Overall
Durability
Value
Features
Design
Usability
Good Amp Good Price!

April 14, 2010

I bought this amp because MTX is a quality brand, and it had the right wattage for my needs......I bought a pioneer premier ts-1201 4 ohms and i dont know if i should have gotten a 2 ohm or what but man for being a shallow mount sub that sucker hits and 90% goes to this amp!!!! Love it

5 of 6 found this helpful

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nicholas

Wichita, KS

Overall
Durability
Value
Features
Design
Usability
great product!!!

March 9, 2010

I've had this amp for over six months and it still works like new. i currently have it powering two kickers and they hit really nice!

6 of 8 found this helpful

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Magilla

Canada

Overall
Durability
Value
Features
Design
Usability
MTX Jackhammer

April 13, 2009

Very good amp....really kicks ass, I have 2 12" Kicker subs behind the seat of my Mega Cab and the bass kicks ass. Would recommend this amp to anyone.

6 of 8 found this helpful

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CBD

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability
JH 300 a Good Deal

August 14, 2009

I purchased, installed, and have used the JH300 for about 6 months. I'm not an audio specialist guru, but the unit and the manufacturer have delivered as promised. I've used this unit in my Dodge Ram and my small convertible with much success. I've hooked up to 8" subs, and can't ask for more

4 of 6 found this helpful

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Browse 1 question and 1 answer
Hide answersShow all answers | Sort by
I notice this amp is listed as Mono, but does have two outputs to speakers. I wanted to run one of your JL 10WVX2-4 to this amp. Would I connect Chanel 1 negative to speaker neg and channel 2 pos to speaker positive? What is your recommendation? Thank you
PeteyP on Aug 11, 2015
MTX JH300
MTX JH300
JL Audio 10WXv2-4
JL Audio 10WXv2-4
Best Answer: Hello Pete, The amplifier 'is listed as Mono' because it is a monoblock. Notice that the outputs do NOT have "channel" labels. This is because they are not "channels" and are simply "outputs". This set up is very common now with 'pro' amplifiers, and is done to ease installation of multiple drivers. Sense that isn't the application here, we won't get into that. To your point, simply choose whatever set of 1-Positive and 1-Negative, it does not matter. The amplifier, being a monoblock, brings the connections together within itself. =]
Reply · Report · Rick MStaff on Aug 11, 2015
· Add Answer · I Have This Question Too (1)

Product Summary

Manufacturer

Model Number

JH300

UPC

715442241316

Weight

10.00lbs

Internal SKU

jh300

Internal Product ID

13164

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MTX Audio JackHammer JH300