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Black Diamond K4X 3200 Watt 4-Channel Full Range Class-D Amplifier OPEN BOX

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Original price $281.24
Original price $281.24 - Original price $281.24
Original price $281.24
Current price $213.74
$213.74 - $213.74
Current price $213.74

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  • AMAZING POWER IN AN EFFICIENT PACKAGE - Capable of 3200 Watts Max Power you'll have all the power you need while utilizing state-of-the-art technology that requires less energy
  • High-End Mini Digital Circuit Design Latest Low-Heat. Circuit with SMC Technology
  • Acrylic Window with Red LED Lighting
  • FULL RANGE AMP - If you are looking for an amplifier that can handle the full frequency range then look no further! Wire the most powerful midranges tweeters drivers or coaxial to this full range series
  • MEASUREMENTS - Overall Length: 11.33" | Overall Width: 4.72" | Overall Height: 1.96"

Black Diamond K4X 3200 Watt 4-Channel Full Range Class-D Amplifier OPEN BOX

**Please reference pictures

No Original Box

In Working Condition

Mounting Bracket on the POWER/BRIDGE side is slightly bent

Small surface scratches and scuffs from previous installation, works as normal 

Open-box items are NOT subject to returns. They are sold "AS IS". All requests for returns will not be accepted.**

This Listing Includes:

  • (1) Black Diamond Car Audio - DIA-K4X


Experience a remarkable 3200 Watts of maximum power without compromising energy efficiency, thanks to cutting-edge technology. This amplifier features a premium mini digital circuit design with low-heat SMC technology, an acrylic window adorned with red LED lighting, and adjustable settings including gain, low-pass, bass boost, and subsonic filter. If you seek an amplifier capable of handling the entire frequency spectrum, your search ends here. Connect your most potent midranges, tweeters, drivers, or coaxials to this versatile full-range series.


  • Amplifier Class: Digital (D)

  • Amplifier Type: 4CH Full Range

  • LED Indicator: Power/Protection

  • Power Input Terminal Size: 4ga

  • Fuse Size: 3x40A

  • Thermal Protection: Yes

  • Over-Load Protection: Yes

  • DC Outlet Protection: Yes

  • Short Circuit Output: Yes

  • Voltage Input Protection: Yes


  • Total Watts (Peak): 3200W

  • RMS Power 4 ohm: 280W x 4

  • RMS Power 2 ohm: 400W x 4

  • RMS Power 4 ohm Bridged: 750W x 2


  • Frequency Response: 20Hz-45Khz

  • Signal to Noise Ratio: >90dB

  • Total Harmonic Distortion (THO): 0.01%

  • Low Level Input Range: 0.25-6V

  • Selectable X-Over: LPF/Flat/HPF

  • X-Over Filter Range: 50-250Hz


  • Overall Length: 11.33"

  • Overall Width: 4.72"

  • Overall Height: 1.96"

  • Heatsink Length: 10.15"

  • Gross Single Unit Weight: 4lbs

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.

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