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Power Acoustik GT4-400

400W 4-Channel Gothic Series Class AB Car Amplifier

Discontinued
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This item has been discontinued

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Power Acoustik GT4-400

400W 4-Channel Gothic Series Class AB Car Amplifier

$49.99

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Belva BAK44 4-Channel 4 Gauge Amplifier Installation Kit

Complete 4-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire

$39.99

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NVX Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

$7.99

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Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

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Product Features

  • 4-Channel Gothic Series Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 30 watts x 4 chan.
    • 2 ohms: 40 watts x 4 chan.
    • Bridged, 4 ohms: 90 watts x 2 chan.
  • Total power output: 400 watts
  • Pulse Width Modulated MOSFET power supply
  • LED power indicator
  • Soft start turn-on
  • 4, 3 or 2 channel operation
  • Speaker-level (high-level) inputs
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Input sensitivity: 250mV - 6V
  • Frequency Response: 15 - 20,000 Hz
  • Total Harmonic Distortion (THD): 0.5%
  • Signal to Noise Ration: 100dB
  • Fuse Rating: 15 A x 1
  • 8 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 4.75"W x 9.75"L x 2.50"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Power Specifications - Full Range Channels

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 speakers or subwoofers 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.

30 watts x 4 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 speakers or subwoofers 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.

40 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

90 watts x 2 channels

Power Specifications - Full Range Channels

Peak Power @ 4 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

60 watts x 4 channels
Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

80 watts x 4 channels
Bridged Peak/Max Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the Peak/Max power created once an amplifier is bridged.

180 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Gothic (Power Acoustik)
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.

AB
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.
4
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.

400 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.

180 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.
Any Gauge with use of Spade Terminal 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.
4 ohms
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.
.05%
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.
Yes
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.
100 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.
No
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).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
15A x 1 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
No
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.

No
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Not Tested
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
57%
4 Star
29%
3 Star
14%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.4
Value
4.6
Features
3.0
Design
4.4
Usability
4.6
basshead86

Lancaster, CA

Overall
Durability
Value
Features
Design
Usability
great amp

June 29, 2014

My infinity 6.5s sounded horrible i took a chance on this amp sounds so much better loud crisp soud the speaker level inputs workd nice since i only had 1 set of rca witch i got conected to infinity mono block and 2 nvx nsw 12s sealed box all off this site best buget subs ever befor all u could hear was loud bass but now with this amp its all blends perfect together if u hook it up rite it wnt humm like sum people say deff recomend great amp great price 4 star just cuz no crossover controls not really needed.

18 of 22 found this helpful

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lionhartp

sanford, NC

Overall
Durability
Value
Features
Design
Usability
good little amp

May 11, 2015

I bought this amp to power my door an rear speakers and it works great For the speakers I have right now. I'm probably goin to upgrade my speakers eventually an will need a bigger amp but for what I have right now it's a good bang for your buck. Not a lot of features but a decent amp.

14 of 17 found this helpful

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Terry

Columbus,GA

Overall
Durability
Value
Features
Design
Usability
Great buy for the money

December 20, 2012

Got this amp pushing Pioneer 6 x 8, sounds great, clean sound.

11 of 13 found this helpful

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Mike

FL

Overall
Durability
Value
Features
Design
Usability
amazing for price!!

April 23, 2013

This amp is powering 2 infinity 6 1/2 and 2 Rockford 6 3/4, and it plays clean and pretty loud! Just doesn't have a lot of features to adjust. Great amp.

11 of 14 found this helpful

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jose

forney, TX

Overall
Durability
Value
Features
Design
Usability
Okay amplifier.

May 16, 2013

This amplifier is good. It has nice power but you can't adjust much. would recommend if on a budget.

8 of 11 found this helpful

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greg

Fayetteville, GA

Overall
Durability
Value
Features
Design
Usability
works as expected

October 5, 2015

instructions are terrible! Obviously need a better translation to ENGLISH.

3 of 4 found this helpful

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K24 559

Corcoran Ca

Overall
Durability
Value
Features
Design
Usability
Bang For A Buck

February 21, 2016

Great Amp works fine except no adjustments but you will be fine as long you buy speakers with built in crossovers or buy them separately. Its a good buy for your highs.

0 of 0 found this helpful

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Accessory Tools and Products

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240 Amp S Series Alternator for Select 1999-2006 Jeep Vehicles

6 phase alternators use less horsepower per Kilowatt than conventional 3 phase alternators

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240 Amp S Series Alternator for 2011 Toyota Corolla

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240 Amp S Series Alternator for 2006-2011 Honda Civic

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370 Amp E Series Alternator with Black Finish for Select 1994 - 2003 GM

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320 Amp S Series Alternator for Custom and Racing Applications

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Scosche TK12

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Pair of 4 Gauge Spade Terminals, #8 Opening

Spade Terminals • 4 Gauge • 1 Red & 1 Black • Nickel Plated

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Pair of 8 Gauge Spade Terminals, #8 Opening

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8 Gauge Ring Terminals, 5/16" Opening

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500 Amp Relay Isolator (BIR500)

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120 Amp 4-Post Battery Isolator

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240 AMP 3-Post Battery Isolator

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World's Smallest AFS / Mini ANL Fuse Holder

Accepts 4 gauge or 8-gauge wire

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ANL/Mini-ANL Fuse Holder with 1/0 or 4 Gauge Input and Output

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4 Pack of 80 Amp Nickel-Plated MANL Fuse

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4 Pack of 100 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 100A Nickel Plated Fuses

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2 Pack of 300 Amp Nickel-Plated ANL Fuse

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Browse 2 questions and 4 answers
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Why did you choose this?
Sonic Electronix Store
by the first review I read from the gentleman with 4 speakers he had installed
Hector G. G on Dec 30, 2015
read the reviews and i have used there products before. the price was nice.
patrick s on Apr 8, 2015
how do I know the amount of amp watts?
Spyderman on Mar 24, 2015
Best Answer: if you click on features specs it will tell you its 45 by 4 at 4 ohm And 75 by 4 at 2 ohm this amp puts out a little less around 30 by 4 at 4 ohm but still sounds great for a budget amp
Reply · Report · adam s on Mar 24, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

GT4-400

UPC

709483042100

Weight

4.00lbs

Internal SKU

gt4400

Internal Product ID

43614

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: Power Acoustik GT4-400

  • Power Acoustik Gothic Series Car Amplifiers
  • How To Install an Amplifier: Car Amplifier Basics Part 2