MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005)

Works great

Got the amp all wired in (all connections properly soldered and heatshrinked), front channels wouldn't work. Turns out the crossover switch for the front channels is very finnicky and if touched it causes the front channels to cut in and out. I contacted the seller - Audio Watt Store - wanting to see if I can get a replacement first so I don't have to undo the soldered connections and chop up wires to return this. They said I can do so via amazon returns. I initiate an amazon return, item never comes, check a week later, order (for the return) cancelled. I initiate another return, replacement item still waiting to be shipped. If I have to undo all of the soldered connections to get a working amplifier, it won't be an MB Quart, and it definitely won't be from this seller. And it's starting to look like this will be the case. This is the price of having everything built in china, dealing with chinese sellers who don't understand plain English and cannot perform simple duties. Edit: I did have to cut the wires out and return this as I was not able to receive a working unit first after almost a month of going back and forth. Spend your money elsewhere, on something higher quality.

I'd give it 5 stars if it had adjustable crossovers... but so far I've been almost completely happy, and considered getting another one for my jeep.

I installed this in my Boat. It sounds good at moderate volume, but if I turn up the bass gain too much it goes into protect mode. Don't expect to crank it up very loud. Overall I am satisfied with it due to the small size and good sound

This is the second time I have bought this amp and both times it has quit working. Is there a known issue here??? First time I thought maybe moisture had been an issue but second time that was impossible. Now I am thinking there are other issues.

Replaced my Z3 power amplifier 5 channel Harmon system and works great