MA AUDIO HK4000D

This is one beast of an amp. It puts out some major power, but at a cost.

I first came in contact with the HK4000D through a local authorized retailer. Let's just say that this amp is not as top notch as some may seem. For starters, MA Audio is not a "name brand" company in the eyes of the car audio community. This is not to say they don't have some good products, or they aren't worth the money; however, generally speaking it is considered a middle of the road brand.

The HK4000D was hooked up to 2 15" Kicker L7's. After around 45 minutes of continuously playing music the amplifier became hot.

Pros: It puts out a significant amount of power (it really made the 15's bump... HARD.

Cons: It has an overheating problem. The S/N ratio and distortion of the unit is not very good. The amplifier is not a name brand and it shows.