Tone Factor (2005-2008)
The Analogue Filter is based on the classic green DOD 440 Envelope Filter made popular by the members of Radiohead among others. It is NOT based on the incorrect schematics floating around the internet. The originals are getting hard to come by and the prices are going up accordingly. This one has added modern improvements like an LED and true bypass switching.
- DOD 440 Envelope Filter
- Alpha Omega Four 40 - Envelope Filter
- General Guitar Gadgets DOD 440 Envelope Filter Replica
- Tone Factor 442 Analogue Filter