5.0 out of 5 stars Works great

2026-01-18    -Quiksilver2101

Bought this to go with Skar's 10" Toyota Tacoma sub box (with included sub) and it powers it great. Installation was easy and straightforward. Doesn't get hot, small size - easy to install basically anywhere, and best of all it is 1 ohm stable (like their sub requires). Only owned and had installed for 2 weeks so if there are any issues I will update this review

Quality of sound good quality of product not so good

2026-01-26    -Cody J.

Sounds quality good power and ground screws sets backoff causing powerless only thing haven't tried is lock locktite in theads to prevent blackout of set screw

Powering 2 10”s and 4 4x6”s well

2026-02-20    -He/him

Have 0 issues so far, no overheating problems and powering everything very clearly

Awesome

2026-01-19    -RSG

Awesome little amp. Very stable signal. Tuned with an oscilloscope to match my sub.

Good amp, needs better cooling

2025-12-30    -Mac

Good value, lots of power. make sure you mount this amp with a gap as the fan is located on the bottom. It worked a lot better for me once I gave it more room to breathe. It gets hot and will overheat if you do not do this

5.0 out of 5 stars Powerful, Clean, and Compact 🔥

2026-01-14    -David Houck

This Skar Audio SK-M4004D amp is a beast in a small package — delivers crisp, distortion-free sound and plenty of power for all four channels. It runs cool, fits anywhere, and really wakes up your speakers. Perfect mix of size, strength, and quality. 💪

Awesome

2026-02-02    -RSG

Awesome little amp. Very stable signal. Tuned with an oscilloscope to match my sub.

5.0 out of 5 stars Great deal for Mini Amp!

2026-02-15    -Dereck W.

I ran this mini 500W amp through my tests including RMS Power output tests using the SMD Amp Dyno. The little Skar amp performed as advertised, no surprises. Skar has an Amp Dyno as well and confirms their ratings with all of their amplifiers. See the attached image of the Amp Dyno results if you're interested in the numbers.You can also see the size comparison to the Sundown SAM-500D, which is not only quite a bit more expensive, but also has the marine coating on the board (whereas the Skar does not). That said, I'd be careful using this Skar SK-M5001D in any environment where getting wet is a possibility. It's better suited for small spaces inside the vehicle.The amp powered the custom 600 watt 12" subwoofer (D2) in the acrylic enclosure with no issues. Sound was deep and dynamic with plenty of output.I also had a technician review the internal components and minus the old design of the driver card with known overheating problems, the amp was given a passing rating. Overall great value for the money.Dereck from Williston Audio Labs

5.0 out of 5 stars Small and powerful 5 channel amp

2026-01-15    -John K

Pleasantly surprised with this amp. This amp replaces my old 4 channel amp and mono sub amp. It is running my 6x9 front door speakers and 6.5 rear door speakers along with a 10” pioneer subwoofer. This amp is a bargain for what it’s capable of doing. The sound is nice and the build quality looks great. I would buy this amp again.

5.0 out of 5 stars Small and powerful 5 channel amp

2026-02-06    -John K

Pleasantly surprised with this amp. This amp replaces my old 4 channel amp and mono sub amp. It is running my 6x9 front door speakers and 6.5 rear door speakers along with a 10” pioneer subwoofer. This amp is a bargain for what it’s capable of doing. The sound is nice and the build quality looks great. I would buy this amp again.