Dayton Audio SPA300-D 300 Watt Class-D Subwoofer Plate Amplifier

I had an old expensive subwoofer in my system. When it broke I was debating sending it for repair, which seems to be ridiculous expensive. A newer model would be even more expensive. Since the problem was with the electronic I also did not want to waste the chassis and the speaker itself. So I stumbled over this subwoofer plate amplifier. Since this one is only a fraction of the cost as any other options I had, I gave it a try. By simply removing the old amplifier and mounting the new one ( needs a small frame I built ) it worked like a charm. Even with the 300W rating it creates a lot of clear sounding bass. This is a perfect replacement when you are on a low budget. It has all the knobs you need to tune and integrate it into your audio system. Requires a bit calibration to seamlessly work in your audio setup. It runs also from 120-240 Volts in case you live in Europe. I'm a happy customer now, every penny well spent.

I had a Paradigm DSP-3200 Subwoofer that quit working. I ordered this Amp Plate which is a bit smaller than original plate was. I made a adapter plate to cover the original hole and fit the new plate into it. (see Pic) This amp plate seems to have plenty of power to run the sub, I've never heard or saw any clipping (on the LED in back), it runs cool even when being pushed. Has plenty of control to suit your room. Build quality is great. Overall, very pleased with this amp

The pilot light on the amp stopped working after being plugged in and running in auto mode for a few weeks. The amplifier itself is still working fine. I was able to avoid trashing a perfectly good Polk enclosure and driver by replacing the amp with this unit.

Got this today, as a replacement for a blown amp on a 17 year old REL T2. Had a lot of time waiting, so I already had a 1" thick back fitted to the cabinet.. Installed amp, and spent a bit of time getting it set up with KEF LSX powered speakers. Did not need the +6 boost at 30hz. Used the KEF app to adjust the x-over points and any trim. WAY more bass than the REL "200 watt" amp. High pass at 70hz; low pass at 65. +1 on bass boost (+2-10 just not needed). That was it, so far. Sounded good! Plug & play, basically. Now, complaints...I ordered this 9 days ago. I am not complaining about not getting 1 day shipping, or 2 day shipping. And I understand that things can go awry. But all last week, Amazon was still advertising "2 day shipping" on this unit. I theoretically could have re-ordered it on Wednesday, received it Friday, and just sent back this unit when it came in (the following Monday). It appears they were promising to new customers while reneging on deals with existing customers. 2 chats yielded promises to "expedite" the order, but that didn't happen. I hope nothing goes wrong with this amp, because I don't want to go into Amazon shipping hell again. Update after a couple of days…on some modern pop, too much bass at +1. Rock, blues, most jazz great. Reggae 👍. Organ music is big, and low volume anything is good. I can adjust on the fly for pieces with too much bass, so thumbs up on the amp. Update 2 weeks later...still too much bass, so -2 on the volume, high pass still at 70hz, but low pass at 60hz. Sounds very good! One last comment, one month in…the Auto On/Off is slow to come on if the music is quiet-ish or lacking much bass. I now leave it On all the time; instructions say that’s costing me 8.5 watts. This seems like something that should be properly engineered out by now.

This product worked great until it didn’t. It lasted 2 months then died. I’m beyond frustrated as this had great reviews. But when i get the amp it worked great until today and it died. I haven’t been pushing it too hard or anything. But yet today it dies. Of course on the day it is the last day to return. I’ve always heard Dayton was a good brand but today the capacitor shorted and zapped the hell out of me while trying to figure out why it wouldn’t turn on even though it ran for that last couple weeks. Today it wouldn’t turn on at all. Then when looking at it. It zapped me like crazy. Don’t buy this amp unless you can afford constant replacement. This amp is trash. I’ve only had two months of use at less than half power. Don’t buy unless you have time to swap many times. I’ll update the review after the company fixes the issue. If they don’t this review will stay as this product currently in my opinion is trash.

I have it running two old 150w rms 10" Pioneer Premier DVC subs that are wired at 2 ohm each, in series for 4 ohm total. This amp is pretty much an perfect fit for them, power wise. It hits hard and clear! I mounted the amp to a generic aluminum "electronics project box" and have the USB powering a small fan to keep the box from getting hot. Before getting this, I was thinking about getting 2 upgraded power supplies for the two smaller amps I had, one for each sub, to get their RMS up to the spec of the subs. This amp was cheaper than the 2 power supplies. So now I can repurpose or maybe sell those amps. I do wish there was a way to make the USB turn off when in Auto/standby or off. The only way is to unplug or flip the main switch off. If the main power switch is on, it doesn't matter which mode the secondary power switch is on, off, auto, or on, the USB would always be on. It's not a huge deal for me, because I normally leave it unplugged anyway. But I do see that as a disadvantage in other situations.

After an hour or two of use this is working well. I was one of the suckers who ended up with a dead Monoprice SW-15 plate amp after 7 months. This amo doesn't appear to be as powerful as the Monoprice but at least I didn't have to trash it. It took me a few hours of measuring and cutting to create a board to mount this to but I'm happy with the results.

Used this to replace the amplifier of a decent sounding, but dead subwoofer. Very happy with the price and results. I am not an audiophile, just a movie listener, so your results may vary.

Gran potencia, calidad de audio, no se calienta. Completamente recomendable.

I have used this for 2 years now... I bought a 2nd one because it was on sale.. I'm using a 12 inch sub...it really pounds good..can turn it down to 60 or 70 hz...makes some really deep bass...I built my own box with a compartment for the amp ...I installed a cooling fan in that compartment...the amp could use bigger cooling fins..in my opinion

Bastante bueno, solo creo que es un poco caro.

Connecting sub 1 out from Marantz SR7015 - no output to 15SSW-4HE verified working SUB, when using R rca input, connecting to L input does produce output. Setting the auto on/off switch to off (that's auto on I presume), amp never turn, setting to on means amp is always on. Fixed everything, cold solder joint on R rca connection, re soldered all ok, switch is 3 position, center is auto on. Not clear in instructio manual. Works well, sounds 👍.

It works for what it is,definitely not 300 watts as advertised, probably like 50 to 100 watts at best. Do not buy, and I can't return it, it's not 300 watts as claimed, junk.