Refurbished Down4Sound JP43 | 4300 WATT RMS Class D Amplifier

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REFURBISHED JP43 AMPLIFIER (Guaranteed not to be DOA, 30 day warranty)




Includes BT Bass Knob!


JP 43 Amplifier: 4300W PLUS RMS MONOBLOCK Amplifier
We introduce the JP-43 , the 4300 WATT RMS (PLUS WAY more if you have a solid electrical) monoblock amplifier. It's like an 4k (4000 WATT) amplifier just with WAY more power. This 4000 watt amp is great for a serious basshead looking to bang some monterous , storm stomping bass out of their subwoofer.. REMEMBER, This isn't your typical 4000 WATT plus amplifier, we upgraded the input to 2 power and grounds, added the best RCA's true tiffany, the internal fan now stays on as soon as you turn on the amplifier to keep it cooler longer. The color is Cream Orange.


THIS MEANS YOU NEED A BIG 3, UPGRADED ALT, AND RESERVE BATTERY(s) to support this amplifier and any others you may have in your setup. If you do not have the proper electrical before installing this amplifier, you will not have a warranty.

Our Ratings on Power for the JP43: TESTED at 14.4V @ 1% THD

1-ohm rating: 4300 WATTS RMS
2-ohm rating: 2300 WATTS RMS
4-ohm rating: 1300 WATTS RMS
Other Specifications on the JP43:

Frequency response : 14Hz –260Hz
Signal to noise : 89dB
Damping factor : 400 <
Efficiency at 4ohm : 94%
Input sensitivity : 6V –0.2V
Subsonic filter : 10Hz –50Hz
Low pass filter : 35Hz –250Hz
Phase : 0 –180 degree
Strappable connection
Working to half ohm in speaker connection
Clipping indicator
Fusing: 400A TOTAL | 200A each positive input ( x2)
BT Remote control with Voltage and Temperature display, Clipping indicator.
C type power connection for BT remote
4 ga speaker output
2 x 0ga power inputs
Operating voltage : 9 to 16 Volts
Dimensions : 15.75 L x 9.37 x 2.64 INCHES

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Warranty Information

Warranty Information

Your new Down4Sound product is covered by 1 limited warranty if purchased from Down4Sound or an authorized Down4Sound 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 Down4Sound. 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 website. You are responsible for the cost of shipping your product back to us for warranty examination. If your product is covered under warranty, shipping back to you will be at no charge to you – if your product is replaced/repaired outside of warranty you must pay for return shipping and repair bill prior returning of the product or if no defect is found you are required to pay for return shipping only.

At the sole discretion of Down4Sound your product 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 Down4Sound the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return!

*  Extended additional warranty purchased on amplifiers take in affect from the date of purchase and must also be stated on orginal sales invoice or receipt. 



Refund/Return Policy:


Down4Sound - Hours of Operation

Monday 6am - 9pm PDT
Tuesday 6am - 9pm PDT
Wednesday 6am - 9pm PDT
Thursday 6am - 9pm PDT
Friday 6am - 9pm PDT
Saturday 8am - 4pm PDT
Sunday Closed
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4 Reviews

  • 5
    Looks new, works great!

    Posted by Matthew Mcgarey on Jul 27, 2023

    This thing is a beast. Looks new and works perfect.

  • 5
    Refurbished JP43

    Posted by Barrett on Jul 01, 2023

    Amazing deals like this are exactly what makes me have the patience to keep checking for items just like this. It arrived in all original packaging. Only thing I can find is a very small blemish on the back of the heatsink that is actually 90% covered by the backplate. I don't think it ever was used by the original customer. I was looking for a Korean STI 4k amp for a pair of X8v3 D4's I managed to get ahold of. If I can update this review after installation I will. So far this has been my favorite purchase of 2023. Thanks to JP and his team my 23 Titan should sound like a million bucks at 2/3 the cost. If you need a 4k amp and are tired of being disappointed go with D4S and the Certified Bass head hardware and wiring.

  • 5

    Posted by Herbert on May 26, 2023

    This amplifier is a monster pushing 2 platinum 18

  • 5
    Hits hard, works great!

    Posted by Justin on May 26, 2023

    I upgraded from a Sundown SIA to the JP43 and the results have been excellent. The crossovers work much better, it sounds cleaner, the bass remote is excellent, and the power is awesome! This amp is the real deal.

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