I recently started to get into vintage receivers/amplifiers. The ability to get something cheaply with great fundamental build quality is attractive (and addictive!) But for equipment that's 30+ years old, things have no doubt degraded or worn out over time. I'm talking about leaky or dried up...

Hi,   I purchased a Meta42 HP amp many years ago for my ER-4P's, and the seller adjusted the design such that my ER-4P's would "become" ER-4S's using this amp.  So I suppose he added about 75ohms or so of input impedance since a 4P is 27ohms and 4S is 100ohms (?).  Just guessing on that last...

Hi,   Please let me know if you're interested in group buy for Bottlehead Crack DIY kit.  I'm considering the Speedball Upgrade as well, so let me know if you're interested in base kit only or Speedball Upgrade as well.   I sent an email to Bottlehead to find out how the logistics work...