The most popular use of a tube screamer is to push a tube amp to make it overdrive more, but they sound good through almost anything.
If you are a geek like we are, check out this awesome article Tube Screamers Secret for some cool info about why the tube screamer circuit sounds so good.
SRV used the TS-808 for his trademark juicy strat tone.
When he used smaller Fender amps that had natural overdrive, he used the TS set clean (low drive setting) with the level up high to push the amp for more distortion (see my CLEAN BOOST info below).
Also the LEVEL knob on these is labeled BALANCE and the external 9V power jack is on the side next to the input jack.
(R) means the trademark after Ibanez on the top of the pedal.Some of these sound BAD, especially the JRC 2043DD chips.Many used the Toshiba TA75558 which was continued on the reissue.Please feel free to use info from this web site on ebay or other websites, but please give credit to analogman.com, thanks!An Ibanez Tube Screamer is an overdrive/distortion pedal that is mild compared to many, but allows the true sound of the guitar and player's technique to come through.