Tube Screamer vs OCD

A Tube Screamer shapes what your amp clips: it cuts bass, boosts mids and compresses, which tightens an amp that is already breaking up. An OCD supplies the distortion itself, with a full-range voice of its own. If your amp is already dirty, buy the TS. If your amp stays clean and you need the pedal to be the sound, buy the OCD.

These are shortlisted against each other constantly and they are not competing for the same job. Getting that right eliminates most of the disappointment either can cause.

01 — The shortlist

Which one your amp needs

#	Product	Best for	Price
01	Ibanez TS9 Tube Screamer Cuts bass, boosts mids and compresses — it shapes what the amp clips rather than clipping much itself.	An amp that is already distorting	$99.99 · Check price #ad How we’re funded · price as of October 17, 2026
02	Fulltone OCD Obsessive Compulsive Drive Supplies its own distortion, with two voicings selected by the HP/LP switch.	An amp that stays clean	$168.45 · Check price $179.00 · 6% off #ad How we’re funded · price as of October 17, 2026

Rows link to the full write-up further down this page. Prices come from the live price layer only — where there is no live figure the button reads “Check price” rather than showing a remembered number.

02The structural difference

The Tube Screamer clips symmetrically inside the op-amp's feedback loop. Because that loop's gain is frequency-dependent by design, the same circuit that clips also shapes — bass reduced going in, mids ahead coming out. It is a narrow, compressed signal by construction.

The OCD does not narrow the signal in the same way. It keeps far more low end and produces considerably more gain, which is why it works into a clean amp where a TS sounds thin. The HP/LP switch is a change to the circuit's gain structure rather than an EQ applied at the output.

01

Ibanez TS9 Tube Screamer

An amp that is already distorting

The number8 mA at 9 V. Ibanez publishes no impedance figures.

With the Drive low and the Level high, a Tube Screamer is functioning as an EQ and a compressor in front of an amp that is doing the distorting. Less bass into the preamp means a tighter result; more mids means more of the range a power section responds to.

That is the configuration this pedal is genuinely good at, and it is why it has outlived thousands of competitors.

It is a poor choice as the sole source of distortion into a clean amp. The bass cut and mid hump are all you hear, and they were never meant to be the whole sound.

Published specifications for the Ibanez TS9 Tube Screamer

Controls	Drive, Tone, Level
Current draw	8 mA at 9 V
Power	One 9 V battery (006P) or a 9 V DC center-negative adapter
Jack layout	Input on the right side, output on the left
Impedance	Not published by Ibanez
What it does not do	No power supply in the box, no true bypass (the TS9 is buffered), and no bass control — the tone stack is a single treble-tilt knob over a fixed mid hump.

Specs from Ibanez TS9 product page. We have not used this unit.

$99.99 · Check price

#ad How we’re funded · price as of October 17, 2026

02

Fulltone OCD Obsessive Compulsive Drive

An amp that stays clean

The OCD produces a full-range distorted tone on its own rather than relying on the amp to do it. Into a clean platform that is exactly what you want, and it is the opposite of what a Tube Screamer offers.

The HP/LP switch changes gain and low-mid emphasis together — LP for a bright amp, HP for a darker one. Most owners pick one and never touch it again, which effectively makes it a choice at purchase.

Past about two o'clock on the Drive it is a distortion by any useful definition. If you were expecting a subtle push, the top half of that knob is not it.

Published specifications for the Fulltone OCD Obsessive Compulsive Drive

Controls	Volume, Drive, Tone, HP/LP toggle
HP/LP switch	Two voicings: LP with less low-mid emphasis, HP with more gain and upper-mid push
Input impedance	1 M ohm on the v2, which Fulltone states was raised from 330 k on the previous version
Input section	Fulltone states a Class A configured discrete 2N5457 JFET input section
Bypass	An internal switch selects Fulltone's Enhanced Bypass or true bypass, which Fulltone states pops in neither mode; the v2 also adds an output buffer
Versions	Fulltone states that OCDs from serial 205811 upward are the newer, less compressed versions
Power	9 V DC center-negative; Fulltone documents internal operation at a higher rail
Current draw	Not published by Fulltone
What it does not do	No power supply included, and Fulltone publishes no current-draw figure, so a shared supply output cannot be budgeted for it without measuring. It is not a subtle pedal at high Drive — past about two o'clock it behaves more like a distortion than an overdrive, and it will not clean up the way a Tube Screamer does.

Specs from Fulltone OCDv2 product page. We have not used this unit.

$168.45 · Check price

$179.00 · 6% off

#ad How we’re funded · price as of October 17, 2026

03Running both

Tube Screamer into OCD works, in that order, with the TS at low Drive and high Level: you are tightening the signal before the OCD's higher-gain stage clips it. The reverse gives the TS an already-distorted, already-compressed signal to narrow, which mostly just adds level and honk.

The wider version of this question — whether the gain should come from a pedal or from the amp at all — is worked through in pedal gain vs amp gain. OCD vs Blues Driver runs the OCD against the other pedal it is most often cross-shopped with, and the contrast there is starker.

04Who each is wrong for

• The TS9 is wrong if you have a clean solid-state amp and wanted the pedal to supply the distortion.
• The TS9 is wrong on a down-tuned guitar, where the bass cut removes the register you were playing in.
• The OCD is wrong if you wanted a subtle low-gain push. Even in LP mode it has more character than that.
• The OCD is wrong in front of an already-high-gain amp channel, where it compounds rather than tightens.