Thanks for the input. I was considering the AQ so that I could have matching amps but the Quart's seem like the better value, as long as the sound quality is the same.
Ive owned both in the last 6 months as well as a Sundown 125.2 and hands down the MB Quart is superior.
The AQ is a solid amp, and has a nice crossover section, however, powerwise it leaves alot to be desired esp at 2 ohm. I also feel like the MB Quart, like the Sundown, sounded "cleaner" on my front stage. The MB Quart is also alot more robust, it honestly feels like (2) Sundown 125.2s in one housing.
Without a doubt, I would go with the 4125, excellent amp in my opinion.
