Andrew Welker, Axiom Audio Design Engineer, explains the subwoofer controls and amplifier...
Sunfire HRSIW8 Dual 8″ In-Wall Subwoofer Review
The problem with the Sunfire HRSIW8 in-wall subwoofer system is the price. At $1700, a response only down to 33Hz is pretty unimpressive. It is not hard to find other in-wall offerings that offer more performance for less money. But it is hard to find one that has an external amp with integrated room correction. The custom installer-friendly nature of the amp and system as a whole is sure to appeal to some. If you have a newer receiver with Audyssey MutlEQ XT32 that can EQ your sub or one of the other standalone subwoofer correctly systems, you can get more performance for less. If you are looking for a decent in-wall subwoofer system with integrated room correction, the Sunfire might be for you. MSRP: $1,700 →
Read full review @ Audioholics