Fender Twinolux EC

[Leevi]

The Twinolux EC has an output power control which can be used to drop power.


Does anyone know how this function has been implemented?
Is it a passive attenuator only, voltage regulator or something else?


http://intl.fender.com/en-FI/series/artist-signature/ec-twinolux-230v-eur/


/Leevi

[SILVERGUN]

Switchable power attenuator with the ability to cut off one speaker for reduced volume.

From a pdf I found published by Mercury Magnetics by Googling "twinolux output power control"
Cant post link cause Im on my phone and its way smarter than me

[PRR]

> a pdf I found published by Mercury Magnetics

http://www.mercurymagnetics.com/pages/news/misc/EC-Series-amps.pdf

But this says the same thing as the Fender sales-sheet you can find everywhere. No tech details.

[SILVERGUN]

Yeah, Im ass-uming a lot, but it does seem pretty obvious...
Take away a speaker and put a resistor in itz place and you'll be seriously db deprived in no time.
Add a third positon and youve got a marketing masterpiece
VVR in this amp would be like variable valve timing in a snow blower

[Leevi]

Thanks for your replies. If I interpret this correctly it seems to be a passive way supported by the
Mercury Magnetics OT?
/Leevi

[VMS]

It could be much simpler.

I'm guessing it's the same that is on the EC vibrochamp with added position to switch the other speaker off.


vibrochamp schematic can be found on this thread:


http://el34world.com/Forum/index.php?topic=15254.0

[PRR]

> guessing it's the same that is on the EC vibrochamp

Yeah, that seems reasonable. Same brand and series, nothing complicated or costly.

But doesn't Eric bless each one?

[shooter]

would be like variable valve timing in a snow blower

how fortuitous, I'm booting the snow blower today, maybe i'll do some mods before the 1st big'n