Did u send it to JL for repair? How long did it take for repair?

Curious how long other company's take to repair?

I've had one of my JL Audio MHD 600/4 fail. I sent it to them and had them repair it. $280 & 2 weeks.

I had a 600/4 with some issues and my dealer just swapped it for a new one

Depends on where you bought it. If you bought it from the online hack jobs - like sonic electronix - then there's a process, since they're not an AUTHORIZED DEALER
You send it to them
They send it to be "re-serialized"
It gets back to them
They send it to JL for warranty repair
It goes back to them
They strip the serial numbers back off
Then they send it to you

If you bought it from a local dealer, the dealer should help out or take care of it.

Amps are fairly rugged but any electronics can fail. I currently have a old Fulton sub amp that died and I am just gonna replace it. Typically I take an amp apart and conformal coat the circuit card, the gain potentiometers are a weak point but they sometimes can be cleaned with contact cleaner.

Yep... Not marine application, but I have 2 or the 1200/1V3 that both seem to have an RCA ground short after a couple of months within the amp... Chased this till I was blue in the face with New HU, New RCA's, New Bass Knob, and didn't want to admit it was the amps... Going back to dealer this week for either service or swap out...

i also sent jl amp back , same results , fixed in good time frame , never another prob

I just sent in a JL Audio 10W7-3 (sub) for a full rebuild, through an authorized dealer. It took two weeks or so. I could not be happier. This is my second one through the same process.

I used to run a car audio shop many (20) years ago. JL Audio was and still is my favorite....because they stand behind thier product.

I've had multiple fail on cars that I've built with monster motors in them that shake 4 lanes of traffic with me at idle. Every failure was due to loose solder joints and that stopped when I started mounting the amps on rubber bushing. Car audio amps are built to take heat and a lot of vibration but I'm not so sure how well they may take the vibration and pounding from a hull as it goes over the waves.

I had great results with medium hardness bushings used on skateboard trucks (old school people may call them CLOUDS). Make sure they're rubber and not poly urethane, though. With that being said, on of the upgrades on the boat I just bought is a new audio system and I will be mounting my amplifiers this way.