Re: Tube amp with 2.5 Ohm speakers??

-- 
"Bret Ludwig" <bretldwig@[EMAIL PROTECTED]
> wrote in message
news:4cd1454f-a270-4049-975a-6b575cddeaa5@[EMAIL PROTECTED]
>

> The options are to use a 4 ohm output and accept a gross mismatch,
> which may be OK  provided the amplifier is not run at full output
> continuously in hi-fi service, but will provide limited performance,
> or to use a different OPT, or to use a matching transformer or
> autoformer in between.

None of the above are acceptable.  The OPT would need to
have an additional 2 Ohm output.

> Conventional opt's have a tapped 16/8/4 secondary which means only
> half the secondary is used for 4 ohm applications in the first place.
> Using a four winding series/parallelable output is an aid, of course,
> but a purpose designed 2 ohm output is highly preferable.

OK Bret.  That's what I had in mind - series/parallel
windings with a 2.5Ohms option.  Thanks for the
confirmation.  But are there any other considerations?

Regards
Iain