Bryston 4Bs have been the high achievers of the audiophile world for over 40 years. Since the first one was built in 1978, tens of thousands of you have purchased one or more for your recording studios, stereo systems, home theaters and more. The high reliability backed by a 20 year warranty has been a great addition to awesome sound quality. Our sound quality has gone from great to awesome since our earlier 4Bs, and we want to prove it. Owners of any previous generation 4B can trade that model in for substantial credit towards our new 4B³. This is a great opportunity to upgrade! For more details, check out our Trade Up page or visit your Bryston dealer. U.S. and Canada customers only.