With speakers there are several DIY designs utilizing Beryllium tweeters or RAAL ribbon tweeters that match commercial speakers costing tens of thousands of dollars.
But with amplifiers I can't find any designs that match their high-end commercial counterparts like Emotiva XPA, Rotel RB-1590 or Anthem STR. The closest I can find are designs using the now obsolete LME49810.
But with amplifiers I can't find any designs that match their high-end commercial counterparts like Emotiva XPA, Rotel RB-1590 or Anthem STR. The closest I can find are designs using the now obsolete LME49810.