quantasylum

I have a Rotel RC-1590 preamp and have noticed that when it's not muted there is an audible hiss from my tweeters. This prompted me to hook up my QuantAsylum 402 analyzer and measure the SNR to see what was up. The spec on the Rotel web page lists the 'IHF "A" Weighted' SNR for digital inputs at...

This is a project I did last year - a mid 70s Luxman L-85v refurbishment with a re-engineered output stage. The output stage PCBs were damaged in the early 1980s I've I had this amp kicking around since then. After 30 years, I eventually decided to try designing and building some replacements...