Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer Amplifier - 1 Ohm Stable - Includes Bass Remote

Beyond impressed, speechless... Delivered early, mint packing no flaws at all. Saw the amps small size and got nervous. Installed the amp to two 12s evl d-4 skar subwoofers in a smaller sealed enclosure wired 1ohm load. Set the gain of the amp just over a quarter of the way up. Volume on my stereo was about 10 out of 60 max volume. It bang's!!! Pushes my 12s hard! Ran it for about an hour temperature of the amp? Cold not even warm at 1ohm! Bass remote perfect . sexy package! This is the new Meta of car audio. Well done harmony audio!! Thank you! That price though!! Yeet!!

I am using this to drive a subwoofer in my Travel Trailer. I have tried it into 2 ohms, 4 ohms, 8 ohms and also into an oddball that burned up its amplifier that measures 29 ohms. That amp just powers through. I have to put the gain way down or it would make the 15 inch sub destroy my trailer. Only about 10 hours on it so no real look at long term yet. So far I am not really stressing it at all so I think it will last as long as I do. It could be improved with some additional markings on the settings dials to at least indicate approximately where various frequencies are. You have to think in logrythmic to make guesses. I will have to dial in settings once I have the whole HT done.

Only complaint I have is the protection coming on at 1 ohm. 2 kicker compR 8’s wired to 1 ohm. Did fine when I only had one and it was wired at 2 ohm. Besides that it’s great!

I'm a fan of harmony products. I have 2 rhythm 10s. This amp is small and powerful 400 rms. It's great for stock stereo no need for a remote turn on. It haves a built in line output converter. Once it sense signal from the RCA/speaker wire. It will turn its self on.

Don't bother. Bought this a while back but never got around to installing cuz I already another amp in place. I figure this would be an upgrade to my existing set up. Old set up was a 80w powered 8" bandpass box. Very efficient, nice addition to my factory system. New set up is this 400.1 amp & a sundown 8" dvc in a vented box.WHAT A LET DOWN!!!I've used sundown 8" dvc subs in other set ups in the passed. They hit hard if powered right. This is obviously NOT the amp for it. With the gain cranked it barely moves the sub.. I'm running a 1ohm load. I should be getting the max power from the amp... THIS THING SUCKS. 😒👎🏽what a waste of time wiring this thing in. 🤦🏼‍♂️

Works great

Took a shot on this amp and it's awesome. You can tell as soon as you open it that the company really cares about its products and it's built well they give you a power sheet in the box from when they test it. Hooked it up to a sub sounds awesome it's hard no regrets just do it

Could not handle my 12s (Kicker) but clean output protection kept activating at 1 ohm..