The speakers themselves seem well built, however the sound is less than average, their tech-support is ZERO! After contacting them with any problems after your warranty is up, below is the answer you will get. They couldn't even answer a simple question when ask. Think twice before buying this product, or plan on buying an extended warranty. Thanks for nothing Acoustic Research.
I apologize but if you used the transformer that came with it, it should not burn your transmitter. As with providing you parts, I'm sorry but we no longer have a parts department nor a repair facility. Since the unit is already out-of-warranty, you may just buy a new one or ask a local to repair it at your expense if you know one.