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OTL and speaker switching

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Posted on March 19, 2014 at 18:50:49
tortilladc
Audiophile

Posts: 7
Location: Los Angeles
Joined: March 19, 2014
 I'm putting together a switching system to share my one set of speakers between a Joule Electra VZN-80 OTL and an Exposure 3010 solid state amp.

I plan on using a Niles SAS1 switch.

However, I have a basic question about OTL safety. It is frequently stated that a tube amp should never be powered on without speakers connected, for fear of damaging the output transformer. Is there a similar danger to OTL amps?

 

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It depends on the amp., posted on March 20, 2014 at 09:30:31
Ralph
Manufacturer

Posts: 4769
Location: Minnesota
Joined: April 24, 2002
 Some OTLs are unstable without a load, just like some transistor and some transformer coupled tube amps. Our amps don't care.

In any case like this its a good idea to consult the manufacturer!

 

RE: It depends on the amp., posted on March 23, 2014 at 08:40:20
tortilladc
Audiophile

Posts: 7
Location: Los Angeles
Joined: March 19, 2014
 I checked with the official repair facility for Joule and they recommend always having some load attached. Better safe than sorry I guess!

 

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