Marts Digital MXS Series 4 Channel 400W Full Range 2 Ohm Amp MXS-400x4 — Big Jeff Audio Dealer Platform
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Welcome To The Dealer Platform


  • Powerful Performance: Experience 400W of pure, full-range Class D amplification for a dynamic audio experience.
  • Compact Design: The MXS-400x4-2 is designed to be space-efficient without compromising on audio quality.
  • Versatile Compatibility: With a 2-ohm impedance, this amplifier is ideal for various audio setups, ensuring compatibility with a range of devices.
  • Includes Hi-Level input harness for front and rear
  • Easy Installation: Enjoy hassle-free setup with user-friendly features, making it suitable for both beginners and audio enthusiasts.

Marts Digital 4CH Amplifier Full Range Class D Compact 400W 2 ohm MXS-400x4-2 V2


  • (1) Marts Digital 4 Channel 400W Amplifier

  • (2) Hi-Level input harness

  • (1) Set of mounting screws and hex keys

Version 2 Upgrades:

  • Includes Hi-Level input harness for front and rear

  • Power/Clipping LED lights integrated into Amplifier face plate

The Marts Digital 4 Channel Amplifier is a Brazilian-Designed marvel that brings high-quality sound to your audio setup. With 400W RMS power at 2 Ohm, this compact Class D amplifier ensures a dynamic and distortion-free audio experience. This amplifier boasts 95W RMS x 4 at 2 Ohm and 55W RMS x 4 at 4 Ohm, making it perfect for car audio enthusiasts. Its versatile crossover provides low-pass and high-pass options from 40Hz to 2KHz, offering flexibility in your sound setup. With a signal-to-noise ratio of 95dB and minimal 1% THD, enjoy crystal-clear audio.


  • 400W Full Range Class D Amplification

  • Compact and Space-Efficient Design


  • RMS Power at 2 Ohm 12.6V: 95W RMS x 4

  • RMS Power at 4 Ohm 12.6V: 55W RMS x 4

  • BTL RMS Power at 4 Ohm 12.6V: 95W RMS x 2

  • RMS Power at 2 Ohm 14.4V: 105W RMS x 4

  • RMS Power at 4 Ohm 14.4V: 65W RMS x 4

  • BTL RMS Power at 4 Ohm 14.4V: 107W RMS x 2

  • Supply Voltage: 9.5-16V

  • Frequency Response: 10Hz-20KHz

  • LP Pass Crossover: 40Hz-2KHz

  • HP Pass Crossover: 40Hz-2KHz

  • Signal to Noise Ratio: 95dB

  • Harmonic Distortion: 1% THD

  • Input Sensitivity: 0.2V-6V

  • High-Level Input: 6V

Physical Product Dimensions:

  • Length: 4.75"

  • Width: 4.75"

  • Height: 2"

Payment Information


We accept PayPal for all ebay orders. You can use your credit through PayPal as all major credit card are accepted by PayPal.

We accept PayPal for all international orders, your address must be verified with PayPal.

We are not responsible for any custom duties or brokerage fees that may apply for all international orders.

When you click on the Buy it Now button you are entering into a
contract whereby you agree to purchasing the item at the price listed.

If you want to ship your item to an alternate address please add
that address on your PayPal account and use the address as the default
or confirmed address to pay us through PayPal

With Free Same Business Day Shipping we work to get you your order Fast. 


All orders over $500 will require a signature for delivery.

All pre-selected shipping rates and methods are for customers with a
valid residential or commercial address within the Contiguous 48 United
States (PO Boxes address may require additional charges).

P.O. Boxes, APO/FPO addresses, Alaska, Hawaii, Puerto Rico, Guam,
U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Canada,
and other countries may require additional shipping fees. Please contact
a member of our team for detailed shipping charges.

Shipping is available only to PayPal verified addresses. When making
payment please confirm your address has been verified with PayPal. Once
payment is made shipping address can not be changed/altered. Payments
made using an unverified PayPal address will be refunded and order will
be canceled.

We will not accept request to change shipping address once payment
has been made. Please confirm your shipping address is up-to-date and

Typical handling time for orders is 1-business day. We do our best
to ship every package with-in 1 business day of receiving a cleared
payment. In some circumstances additional time may be need, in which
case we will contact buyer.

Shipped orders that are returned by the shipping company due to an
insufficient address or an undeliverable address will be refunded less a
20% restocking fee.

If package is refused or marked undeliverable and returned
back to us by the carrier, you will need to pay the shipping cost in
full to have the package sent back to you or we can refund the money
minus the cost of shipping


If you have not received your package, but the tracking information shows that it was delivered,
please do the following within 36 hours of expected, stated delivery:


Verify the shipping address on the order is the address where you are looking for the package

Look for a notice of attempted delivery

Look around the delivery location for the package, or see if a neighbor has accepted the delivery

Be sure to double check your mailbox and other usual spots for package delivery


If you think that your package has been stolen, we will require a police report since this is now theft.
Once we have a police report on file for the stolen package, we will reship your order.