Ibanez TS9 Mod (JRC4558D Chip)

Up for sale is an authentic Ibanez TS9 Tube Screamer, Made in Japan (PCB #900101 / HG20623).

This pedal has been professionally modified to Ultimate Vintage TS808 specifications. This isn't just a simple parts swap; the entire circuit has been "blueprinted" and upgraded with top-tier audio-grade components to deliver the most organic, creamy, and touch-responsive overdrive possible.

Technical Highlights of the Modification:
The "Holy Grail" Chip: Features a selected JRC4558D Op-Amp (Date code 0836). This specific lot is highly coveted for its warm, vocal-like midrange and smooth clipping. The chip is mounted on a high-quality gold-plated socket, allowing for easy "chip-rolling" experiments without soldering.

Premium Component Upgrade: The circuit has been overhauled with superior capacitors to eliminate noise and open up the frequency response:
WIMA (Blue) Film Capacitor: For ultimate signal transparency.
MKT (Yellow) Caps: For precise harmonic content.
Mallory / Polyester Film (Brown/Red) "Drop" Caps: For that classic, "woody" vintage texture that stock pedals lack.
Improved Dynamics: Optimized clipping section for a more tube-like break-up that cleans up beautifully with your guitar’s volume knob.

Condition & Sound:
The pedal is in excellent cosmetic and functional condition. It's dead-quiet even at high gain settings.