Shunt Attenuator

Has anyone tried this attenuator which uses the very expensive Shinkoh tants? I'm looking for a compact, good quality, drop-in replacement for an Alps Blue pot.

Cheers

 

Looks nice, but why not convert your Alps to a shunt.



Find out what resistance pot you have, lets assume 100k log. Then buy a pair of the best resistors you can afford/want to buy of the nearest/same value, lets say 97K. That becomes Rx and the Alps Ry.

This has been discussed here http://wduk.worldomain.net/forum/showthread.php?t=1047

 

Hi LiloLee,
THanks, That's an elegant solution, which must sound great, but it won't solve the problem of inprecise channel balance, the bugbear of pots.
grivois

 

its worth a go though just to try it out - I've done this in one of my integrated amps and built a passive pre using this method. Both sound really good (both using alps blue pots). I'm about to do it inside an amp I've picked up for a mate...

 

What kind of % imbalance are you talking about?

A voltage divider is calculated Vout = Vin*R2/(R1+R2)

You'll find that is you are talking about 5%, this will come out at 2.5% at max volume and will decrease exponentially and become insignificant in the usual listening range.

But if you want to spend £££ then go for it or how about a Goldpoint or DACT