MB Quart ONX4.80/500

Overall Good 5 Channel

Currently have this installed with 2 pairs of MB Quart 6 x8 components and 2 Boston Acoustic 10.5lf Pro subs. The front and rear channels have a lot of power and overall the amp has a lot of features.

However, the 5th channel lacks a bit, however acceptable for my listening levels. I have the 2 Ohm 10.5s in parallel so I'm presenting the amp with 1 Ohm. That was one of the reasons I bought this amp as it was 1 Ohm stable. The 10.5s just require a lot of power to get them to stand out, previously I had them paired with 1000watts at 1 Ohm and that was a good match.

I would have to say though now that I'm older, this is a perfect one amp solution for someone looking to have a single amp driving everything. Has a load of crossover and tuning options, the bass control works great as well. Just don't expect it to drive monster sub woofer loads. Would I buy again for a standard car audio system with great sound quality, yes! Would I buy it for a competition system or at least one over the top, no.

Good 5 Channel Amp

I was looking for a good SQ type amp for my pickup (limited space) and found this was 1 ohm stable on the sub channel for future upgrading.

The filters make it easy to keep bass out of the speakers that can't handle it without use of the head unit filters. Sub is crisp and clean but not insane. For the price I was very surprised how clean an amp this is, just don't expect to win any SPL awards. Perfect for listening to your music instead of using it as a back massager :)

The only weird thing is that there is no external fuse on the amp, and they suggest a 120 between the battery and the amp. I've run a 60 amp since ownership and haven't blown it yet. I suspect you would need a lot of load to warrant a 120 amp breaker/fuse.

I would buy again for this application, but would always run different amps for sub and components given the space and budget.

Great amp overall

Bought this around 6 months ago for my whole system, running a Fi Audio 10" sub and 4 5.25" JL Audio door speakers. This thing sounds really clean and doesnt seem to draw too much power. The door speakers sound so much better than when using the deck, you almost dont need a sub.

i have my sub running at 4 ohms, so i could be getting more power out of the amp, but it still slams really hard. I also noticed that i dont have engine noise anymore, probably because of less draw on the alternator.

Build quality is pretty good overall, my only annoyance is that the tuning knobs are kind of set-in to the amp frame so you need a screwdriver to get to them. Just makes it harder to tune it tight spaces.


overall i am really satisfied with this amp, would buy again.

Great amp

This was my first 5 channel amp and I was pleasantly surprised at how well it did the job. It looks fantastic and delivered all the power I required to the rest of the system flawlessly. Tuning was simple and the standard operating temp was unbelievably chilled, it was below every other amp I've owned before.

Great amp!!!

I'm a former Pro installer..now its just a hobby! I installed this amp into a relatives old school Monte Carlo a few months ago! This amp really impressed me with its clarity and output! I installed it on two Polk 5x7s, a set of Polk MoMo 6.5 components and tweeters...with the fifth channel powering a JL 10in. sub! This amp really puts out some very loud and crystal clear highs and Mids! I will also tell you, I didn't think that little ten would be heard in that big trunk...I WAS WRONG!!! This amp is really pushing that sub! You can really feel the bass!

Cheap

Cheap product with cheap quality. Clarity is not very good. The good thing is that it never shut off.

Powerful

This was my first five channel amp. Before, i had un-amped pioneer door speakers and 2 L5 15's hooked to a brutus 2400w. When i put the onyx amp in, my door speakers were noticeably way louder/clearer, and the fifth channel is said to put out 500 watts max on this onyx amp, but pushed the hell out of my 15's. Sounds louder and better than the 2400 watt amp. The MB Quart is a great amp, with no extra batteries or big 3 upgrade, my lights still don't dim from this amp turned 3/4 of the way up.