Keeley TS-808 Mod+/True-Bypass TubeScreamer Pedal - Used  From Keeley

The legendary 808 with the finest, most popular set of tone mods you could dream of, The Keeley Plus Mod and True-Bypass clarity and fidelity.

The new TS808 offers a vintage look and sound. Many people are wondering if it needs mods since it’s the Holy Grail TS808 with the new JRC chip installed. Sure it does! If you look at the board, it’s the exact same as the TS9 and has the same “faults,” if you will. Areas that need improvement are limited bass response that cuts so much that it appears as a huge midrange hump in the sound. There is also a limited gain range which means it doesn’t get clean enough or on the other hand, doesn’t get enough distortion. So to combat these issues we increased the gain range allowing it to get cleaner and more distorted through the range of the drive control. Also, the lack of transparency or muddiness becomes a problem for many users. All these things are fixed with our mods. Our approach is to give you the most out of this classic pedal.

The TS808 needs mod work! It is really the same thing as the TS9 re-issue with just a new JRC chip in it. But the chip is not the main problem with the unit or the magic part needed to make it sound perfect. Keeley Electronics mods these pedals with many thousands of units’ worth of experience in making people happy. So instead of telling you about the “MOJO” we do to it…we’ll tell you like it is!
The bass response is improved to the point of perfection. It is nice and tight and not muddy at all. We upgrade that cap from a 0.047 to a 0.1uF and at the same time we increase the gain possible when the drive control is turned up. That resistor is dropped from a 4.7k to a 2.4k. We also make the pedal so it cleans up more. We take the 51k and lower it to 20k. This is our More/Less mod. You get both more drive and less drive as well as all the sweet stock spots in the middle of the control. We also upgrade the 1uF electrolytic caps to high tolerance, great sounding, more consistent 1uF metal film caps. This type of thing is done in all HI-FI stereo and audio gear.
We also use a gold socket for the chip so that you can experiment if you hear one chip is better than another, etc….
We upgrade the tone control circuit and take the .22uF Tantalum to a 0.18uF for better control and response from the tone control. This allows you to get a more full sound on the lower end of the tone control.
We also improve parts of the fet switching so that you have a better, clearer tone, both on and off. We check all the factory solder joints so that you don’t have power supply problems anytime soon! The resistors we use are metal film to reduce noise in the system as well. Obviously, this is not the kinda of MOJO many others talk about. So think twice before sending it off to a man that promises you very little substance.
Why is ours cheaper?!?! Because we’re bad to the bone and efficient as hell! Plus! we’re musicians that know expenses and a few bucks here and there mean a lot.
How do I know this is the right way to mod the pedals for the masses? Because we take feedback from customers and turn it into reality. This is where YOU GUYS have led us to the perfect Tube Screamer sound! Shoot, THANK YOU!!!
To those that follow us really closely, they may have noticed that our several year run of Vintage JRC4558 chips from 1982 have come to an end. We went through thousands of them! We’ll we have tried to source some more but have only come up with Fakes or Forgeries! So, from here on out our TS808 mods will get the same great Texas Instruments RC4558P that we use in our TS9 mods. We still feel that the TI chip is the best of the best; the Vintage 82 JRC’s we had were great and were a fun thing to have. I enjoy the TI RC4558P over other chips, I think you’ll agree!