In Reply to: Stereo upgrade ?'s posted by Medicaptain on March 01, 2001 at 14:48:01:
Problem 1: When you replace the amp, you lose the crossovers which are built into the HK unit. The crossovers limit the frequency range that each of the speakers is fed and are required for the speakers to work right. Since the stock speakers also suck, you should pick up some replacement speakers that will also have their own crossovers. Some good options include MB Quart, Boston Acoustics and Dynaudio, among others.
Problem 2: The HK amp has separate channels for to drive your front and rear speakers as well as power the sub-woofer. You either need two amps, one four-channel and one stereo (bridged for the sub), or you have to give something up. I chose to delete the rear speakers (improving stereo imaging) and use a single four-channel amp, bridging one set of outputs for the sub.
Potential Problem 3: Once you have a good amp, if you prefer loud volume levels you'll probably destroy the factory sub. But if you're cautious maybe you won't blow the sucker.
Budget can range all over, but you'll likely end up spending about $400 - $500 for the front speakers and crossovers, $400 - $500 for the amp and another $300 - $400 for a sub-woofer. Installation will not be cheap (and if it is, you should be in serious doubt about the shop).
I hope this helps.