2. amps-preamps
  3. 191719-6009

Paul Speltz Zero-Box Autoformer With Tenor OTL

Hello everyone,

is there anyone using Paul Speltz Zero-Box Autoformer with Tenor OTL and can give a full user experience please? My concern is whether the PS Zero Autoformer will degrade the extreme frequency of what the tenor the best for.

The speaker by now with the Tenor is Rockport Antares.

 

Thanks in advance for all the input.

 

 

lawence_carpio

Showing 2 responses by larryi

larryi
4,188 posts
 

Mike,

I think you are talking about a linestage or passive volume control, including transformer/autoformer volume controls, whereas the original poster is inquiring about an autoformer inserted between the amp and speaker to reduce the output impedance of the amp (typically quite high with OTL amps).  I don’t know how this sounds, but this turns an OTL into an amp with an output transformer.

larryi
4,188 posts
 

I’ve not heard an auto-former on any speaker so I don’t know how it sounds.  But, I too am skeptical about putting a transformer on an OTL.  Ideally, OTLs would be used with higher impedance speakers, so I can see why someone without the right speakers might cheat a little with an auto-former even if that is less than ideal. 

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