2. amps-preamps
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Do tubes need break in / burn in?

I've bought a set of NOS JAN Philips 5751 tubes to replace JJ 12AX7 in my preamp. After the change, the sound has become worse. The soundstage depth is flat, and just less involving overall. Do the tubes need break in, and if so how long do I need to burn them in?
jylee

Showing 1 response by juancgenao

juancgenao
64 posts
 
HI, had same preamp years ago,VTL5.5 and the only tubes that work best was siemens 12ax7 don't even try telefunken they sound terrible in that preamp, another suggestion is that,
VTL 5.5 is not a good match with SS, amps reason why sold my

regards: ,
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