Customer Ratings & Reviews

Great Sounding Amp

I love the quality of the sound that comes from this amp. I just wished I had the clipping light on this unit as it does on the RD400/4. The only reason I went with the XD400/4 over the RD400/4 is the signal to noise (dB) on the XD amp.
The XD series also comes with a 2 year warranty as opposed to a 1 year warranty on the RD series amps

Amazing sound

Matched with JL audio c2 speakers this amp provides great crisp sound. The roll back feature is a cool feature that the amp will never shut off due to heat.

By Mark on February 12, 2024 Verified purchase

Awesome little amp

Needed an amp to fit where the stock Monsoon amp was in a 4th gen f-body. This amp fit on the original amp bracket without any problem. Hooked up to two pairs of jl audio c2-650x coaxials it's the prefect amount of power.

By Andrew J. on February 25, 2018 Verified purchase

Surprisingly powerful.

I’m impressed. I was running 3 separate amps to power 4 pair of JL speakers in my doors and one pair in the dash. I replaced them with this amp. Much cleaner looking and sounding. My subs are stronger because I’m drawing less power. My other amps were running warm and shutting down so I like that this has a cool down mode. Easy to hook up and install. The best terminals of any amp. Just ordered one more for my dash and will drive extra tweeters off the other channel. Never hurt to flash JL too.

By Anonymous on August 6, 2018 Verified purchase

clean clean & clear

geese may i just inform you that this amp does not stop the sound quality it delivers is simply outstanding, thank you Sonic for making my music experience pleasurable.

By Anonymous on September 28, 2018 Verified purchase

Two words... Sound Quality!

I was using a JP 4 channel amplifier prior to installing this. There was this annoying whining sounds when the volume was down. I checked all my grounds and even added a ground to make sure I was good. Sound never went away. I actually tried the class D JP 4 channel and the class AB JP 4 channel amplifiers, they both had that sound. I decided to stop being cheap and get an Amplifier from a reputable company. This amp provides all the power I need to my infinity kappa component sets . Sound is clean, clear, and crisp. Also, that annoying whining sound is gone. It's crazy how quality equipment just performs cheaper equipment in areas other that power. Power is cheap these days but quality of components is not. I was a JL guy back in the 90s but gave some of the cheaper products a shot. Ill put my money of the quality stuff... JL being one of them. Hopefully this review helps someone.

By Joshua on November 5, 2023 Verified purchase

Great súper amp !!!

By juan on January 14, 2024 Verified purchase

Great value for JL audio and love the compact design!

By Beau on April 26, 2024 Verified purchase

Small & powerful

Awesome little amp with the strength to be heard loud and clear. Powering 2-6.5 & 2- 6x9 component infinity combos.

By Saul on March 19, 2025 Verified purchase

Great product for a great price!

I got a screaming deal for this JL Audio amp and not to mention the quick free shipping!

By Ricky on October 21, 2024 Verified purchase

Awesome Value

This is a great price I had the 5 channel xd version of this style amp. I had also purchased this amp through sonic electronics and it was just rock solid. The only thing is I won’t be installing this amp in my boat till spring time. Can’t wait to rock out!

By Stephen on October 19, 2024 Verified purchase

Nice amp and great price

This was a replacement for another JL Audio amp and so far I am happy with the sound and performance. Easy to install and solid build. Lots of connection options and simple to adjust. I did have to go to a higher rated fuse on the 4awg power wire but no problems otherwise. Will probably get another one for my truck when I get a chance to upgrade that system.

By Anonymous on October 14, 2024 Verified purchase