Polarized Electrolytics in Tone Stack

[WGTP]

I scaled the Vox tone stack (by a factor of 20) to match the trim pots I had for my breadboard (50K) and ended up with a value of .47uf for 2 of the caps.  I can't seem to get it to work right, and I was wondering if the Electros might be the problem.   

[R.G.]

Could be. Electros get downright non-capacitor looking when you reverse the voltage. Aluminum is worse in this regard than Tantalum.

With film caps in small packages commonly going to 1 and 2uF, why chance it?

[WGTP]

Thanks for the response.  I was trying to work with the parts I had on hand and electros were all I had in .47uf.  Also 50k rim pots. 

As usual, I tried looking at the stack with my other eye and lined it up more in harmony with the cosmos while chanting "Boom Shaka Laka Laka Boom Shaka Laka Uga Boom" and it started working with the electros. 

In the mean time I had simulated it with the Duncan and found I could switch to .22uf caps by doubling the main resistor value and get pretty much the same response.  The Vox stack has a weird Bass control in that from 85 to 100% it is controlling the mid-range and the lows don't do much until 0 to 15%.  Not much happening in the 50% range that you would hear with a guitar amp.  Wonder if I can change that.