This is the BYOC no non-sense Tube Screamer clone kit. No modifications. No fancy switches. Just pure TS-808 specs with the original JRC4558D chip and the highest quality components so you can build your own handwired, true bypass, Tube Screamer. This build is so simple, it's almost criminal. Get all the tone of the original TS-808 Tubescreamer at a fraction of what the reissues and boutique versions cost.