MSRP: $1,689.99
Was: $1,352.99
Now: $1,082.39
(You save $607.60 )
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 Sundown Audio Salt 4k Amplifier

• Digital Class-D Linkable Mono Block Amplifier
• Dual MOS-FET PWM Power Supply
• 1 Ohm Stable Load
• 24 dB/Octave – Variable Low Pass Filter
• 24 dB/Octave – Variable Subsonic Filter
• 9 dB/Octave – Variable Bass Boost
• 180° Variable Phase Shift
• 4 Way Protection Ciruit (Thermal, Voltage, Speaker Short, DC Offset)
• Wired Remote Control with Voltage & Temperature Display and Clipping Indicator


SPECIFICATIONS (Tested @ 14.4v)  
2 ohm Linked RMS 8000W
1 ohm Mono RMS 4000W
2 ohm Mono RMS 2000W
4 ohm Mono RMS 1000W
Recommended Fuse Rating 400A
Low Pass Filter (Variable) 35Hz-250Hz
Subsonic Filter (Variable) 10Hz-50Hz
Bass Boost @ 45Hz 0-9dB
Phase Shift Control 0-180 Degrees
Input Sensitivity (+/- 5%) 6v-0.2v
Frequency Response (+/- 1dB) 10Hz-250Hz
S/N Ratio 90dB
Working Voltage 9v-15.5v
T.H.D @ 4ohms < 0.1%
Efficiency @ 4ohms 90% <
Dimensions 22.05″ x 8.67″ x 2.80″
AMPLIFIER WARRANTY INFORMATION: Your new Sundown Audio amplifier is covered by a 2-Year limited warranty if purchased from an authorized Sundown Audio dealer. This warranty does not cover improper installation, accidental damage, misuse, abuse, improper wiring, operation of unit outside of listed specifications, or any product that has been modified or repaired by anyone other than Sundown Audio. Your warranty covers defects in materials and/or workmanship ONLY and is not an insurance policy. The warranty only covers the original owner of the amplifier.

All warranty returns must be accompanied by the original sales invoice or receipt. You must contact us to request an RMA number prior to sending any returns via the RMA request form on our web-site. During the RMA number process we will generate a pre-paid FedEx label for your return. If your amplifier is covered under warranty shipping both ways will be at no cost to you �� if your amplifier is replaced/repaired outside of warranty or o defect is found and your product must be return to you shipping both ways will be billed to you.

At the sole discretion of Sundown Audio your amplifier will be either repaired or replaced when it is being covered under warranty. In the event of shipping damage due to improper packaging on products being returned to Sundown Audio the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return!

In no event will Sundown Audio be liable for incidental, consequential, or other damages resulting from the use of this product, this includes but is not limited to, damage of hearing, property or person, damage based upon inconvenience or on loss of use of the product, and to the extent permitted by law, damages for personal injury. This warranty gives you specific legal rights, and you may have other rights, which vary from state to state. This warranty applies only to products sold and used in the United States of America. In all other countries please contact your local distributor.

12 Reviews Hide Reviews Show Reviews

  • 5
    Salt 4 amplifier

    Posted by Duaine daft on Nov 22nd 2021

    I own 1 sundown audio x12 d2 v 2 I is the hardest hitting sub I have owned I bought the sundown audio salt 4 to push it and another subwoofer the same model

  • 5
    Sundown salt 4k

    Posted by Chuck daddy on Aug 24th 2021

    This amp has great power at 1ohm . Can’t beat the speed and service from D4S .

  • 5
    salt 4k

    Posted by Gio gomez on Jul 19th 2021

    By far best amp ive ever owned and been in the car audio game for years ! inlove with Korean boards ! Make sure you have the power to make the power strong electrical required!

  • 5
    Salt 4

    Posted by Jon Mccleery on Jun 9th 2021

    Great amp. Clean power.

  • 5
    Sundown SALT4

    Posted by Scott Ouimet on Nov 27th 2020

    I've bought 2 from D4S so far. The first for my X18s and the 2nd to go on a pair of Zv5 18s and they haven't disappointed. Best amp I've owned to date.

  • 5
    Salt 4

    Posted by Rudy Barber on Aug 10th 2020

    Great amp definitely power house on 2 u12s

  • 5

    Posted by Rudy Barber on Aug 3rd 2020

    These amps are what they say. Pure power

  • 5
    Salt 4

    Posted by Jay Tee on Jul 22nd 2020

    This amp is unbelieveable. I dont know where to start .I'll just say this you have to get one yourself and see for yourself ⭐⭐⭐⭐⭐

  • 5
    Good Quality Excellent Amplifier

    Posted by Ricardo on Jul 9th 2020

    it's worth the price, it's got a lot of power and control. It's excellent. I love it