Tone Control For Ruby Amp?

[H5N1]

I built a stereo Ruby the other day, for use as a desktop iPod amp.  Volume and gain controls seem better suited to the Ruby as a guitar amp, so the question is: is there any way to add a tone control?  One-knob tone is fine for this application, though in the interest of scicence it would be cool to have instructions for a two or three band EQ.
Thanks all,
-H

[PRR]

> for use as a desktop iPod amp

Not stompbox. "Hi-Fi". Look for hi-fi plans.

An easy path is CanaKits Advanced Stereo Tone Control.

Stereo volume, balance, bass, treble, $27 kit. The chip they use is so last-century, but a golden oldie.

Or: Velleman - Volume And Tone Control - Preamplifier : K8084, $25-$35 (shop around)

http://store.qkits.com/moreinfo.cfm/K8084
http://www.hndme.com/productcart/pc/viewPrd.asp?idproduct=1968

If you are knob-crazed: Velleman K2663 gives you a dozen to diddle for ~~$50.

It's really made for a modular mixer, so it will be good fun to figure how to use it plain-stereo.

Also:
http://store.qkits.com/moreinfo.cfm/FK626
http://store.qkits.com/moreinfo.cfm/QK100

There's lots more out there, but what you want is more in the hi-fi realm than in music instrument sound modification.

[H5N1]

 
Naw man, I'm not looking to build another amp.  I'm just looking to add a simple tone control to a Ruby amp, like the subject line says.

[punkin]

I'm a fan of the VOX stack but you'll loose something around 10 dB.

[compuwade]

You can try some of these and see how they do for you. http://amps.zugster.net/articles/tone-stacks Or..

You can implement the tone control included in the noisy cricket. http://www.beavisaudio.com/Projects/NoisyCricket/MarkII/NoisyCricketMarkII_RadioShack_Rev2.pdf

If you search the layout gallery you will find many tone controls that will work for you.