I’ve been using a tube preamp for several years with my krell ksa 300s, it’s just as safe as using a solid state preamp. The reason this subject always comes up is because there was a certain BAT tube preamp that leaked DC and damaged amplifiers. Just make sure you turn your system on in the proper sequence, amp should be last to turn on and first to turn off
Vacuum Tube preamp with my KRELL KAV 250a, a no no......WHY?
I have an older Krell KAV amp that has been recapped and refreshed. A technician that I respect very much said do NOT use a vacuum tube preamp with my KAV 250, or any other Krell amp for that matter. Can someone with more technical knowledge than myself tell me why I should not be using a vacuum tube preamp with my Krell? Are there some technical specs that I should be aware of when pairing?
Thanks
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If you haven't bought a tube preamp yet, you could buy a transformer coupled tube preamp, then you would never have to worry about it. Most capacitor coupled tube preamps are fine with solid state amps. Again just remember to turn your system on in the correct sequence because the tube preamp has to stabilize before the amp is powered up. |
@atmasphere there were many krell amps damaged from BAT tube preamps, they got a bad batch of Jensen capacitors. If it would have only been one amp damaged, krell wouldn't have went to the trouble of putting capacitors on the input of their amps with jumpers to bypass the caps if not needed. |