Slowly evolving over time since I started with my very first receiver (JVC-100 w/Ohm 1 loudspeakers). Always looking for ways to upgrade and improve, of course. The most recent purchase being the Emotiva ERC-4 CD/DAC device. The biggest single improvement being to add a 2nd Infinity BU-1 subwoofer. The Bryston has dual "mains" that allowed me to feed the output to the amplifier of the BU-1's. The dbx 118 was inserted between the Bryston and the Infinitys to provide range expansion over the lower frequency cut-off. Eventually a 2nd turntable (currently looking at a Fluance RT-84) with a moving coil cartridge to take advantage of the MC input on the 1B-MC.
The Carver C-3 began to show her age with an audible hum at low volumes.With a bonus from work, I started to shop for a replacement preamp. Saw an opportunity on eBay got the Bryston 1B-MC and jumped on it. Unit is in 'pristine' condition (as pristine as one can get for being over 20 years old) and sounds simply amazing! The sound stage opened up (much, much better then the Carver Sonic Holography feature on the C-3) and the sonic detail was simple breathtaking! Sat through and played Miles Davis (Kinda Blue), Steely Dan (Cant Buy a Thrill) and topped it off with Rachmaninoff (Rhapsody on a Theme of Paganini). One typically takes a risk on eBay, but this has paid off so far.
System edited: Some cleanup to the system and new additions. The Sub is new and getting ready to be installed. The 'new' TEAC is replacing the Nak BX-1 which has gone through two sets of motors/belts since I purchased it.