Dating vintage ibanez pedals
It was preceded by the Orange "Overdrive" and green "Overdrive-II" which came in narrower boxes without the battery cover, and the reddish "Overdrive-II" which had a box very similar to the TS-808.
The lighter green OD-855 Overdrive-II is also in the TS-808 style box and has a circuit which is similar to the 808 - the board part numbers only differ by one digit.
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.
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 Screamer®’s Secret for some cool info about why the tube screamer circuit sounds so good.
There is really no difference, although some of these have a Malaysian Texas Instruments RC4558P chip instead of the normal Japanese JRC4558 chip.
The most popular is the TS-9 tube screamer, which is almost the same as the TS-808 internally.
Externally the on/off switch grew to fill about 1/3 of the effect.
It uses two 1458 chips which are the 1st version of the low-tech dual op-amp.
Also the LEVEL knob on these is labeled BALANCE and the external 9V power jack is next to the input jack.