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Fulltone OCD User Manual page 2

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Internally selectable True-Bypass or Enhanced Bypass
For many years the average guitarist's rig consisted of only a few pedals, and True-Bypass (TB) switching was the
ultimate way to achieve a clean signal path. Everything's different now, most guitarists have elaborate pedalboards with
10 or more pedals being the norm! Once you have multiple jumper cables, multiple effects (even with true-bypass)
pedals, there is tone loss and loss of dynamics, meaning the amp ceases to respond to differences in picking attack.
Worse, many tuners, loopers, and pedals employ poorly-designed buffered-bypass, while recouping some of the
high-end signal, they still suffer from a complete loss of dynamics. Enter Enhanced Bypass
Fulltone bypass system brings back all of the lost dynamics and tone that all those cables and other pedals take away.
And EB offers totally "pop free" switching, so you don't get any loud and possibly destructive noises when switching the
pedal ON or OFF.
You can choose whether your OCD employs True-Bypass or Enhanced Bypass
(removing all 4 thumbscrews and pulling the pedal enclosure apart) and sliding the Bypass switch up (for EB) or down
for (TB), see photo to the right. Warning! make sure that the switch is set either full up or full down, and not in the
middle, to avoid cutting out of the sound accompanied by a strange high-pitched noise.
Fulltone 3PDT footswitch: we use the best parts available anywhere, including the best switch in the world...
the Fulltone-designed manufactured 3PDT.
Drive Knob: Turn this Clockwise (CW) for more distortion, keep below 10 0'clock for cleaner sounds and for
boosting your amp's input without changing your basic tone
Volume Knob: Controls the amount of signal that exits the pedal. The OCD has about 20dB of available gain (more in HP mode) so don't be surprised if you end up running
the Volume control at around 9 o'clock to get unity gain.
HP/LP switch:
Set to HP (High Peak) you get increased increased distortion throughout the Drive Knob's range, more volume, and a slight increase in the midrange (between1-2 Khz) for
more of a "British" vibe (ala Vox and Marshall)
Set to LP (Low Peak) you get incredible accuracy to the original sound of your Guitar and amp...very little coloration! Excellent for Clean Boosting, for cranked Blackface or
Tweed-style ones, and for when you're not going for a British type sounds.
Tone Knob: This knob only affects the high frequencies, you'll find that 12 o'clock position is very much neutral, turn it CCW (counter clockwise) to 10 o'clock or so for
smoother high-gain lead sounds (with Drive knob higher than 12 o'clock) or turn it clockwise for more cut, and a less compressed feel.
Sample Settings:
Blues/Rock Rhythm tones (Neck PU, on clean set amp)
Volume= 11 o'clock
Drive= 10 o'clock
Rock British Tones (Bridge PU on clean set amp)
Volume= 10 o'clock
Drive= 1 o'clock
Input Impedance = 1 mega ohm
Output Impedance = 10k ohms (when pedal is switched ON and also when switched OFF while employing Enhanced Bypass
Current draw= approximately 8 milliamps
DC Power Options You may run this pedal on the 9 volt battery (included) or on any voltage between 9 and 18 Volts DC as long as the adapter is (standard) 2.1mm x 5.5mm
barrel plug with "Negative to Center Pin" configuration. (as illustrated by the following diagram)
To access the battery remove all four Thumbscrews from the sides of the pedal and pull the housing apart. Replace battery, put housing back together and re-tighten all four
screws. Unplug guitar cable from INPUT when not in use to prolong battery life but If you have an adapter plugged in to the DC outlet of the OCD there is no need to unplug
the guitar cable from the INPUT because our DC outlet is True-Bypass and disconnects the battery supply line, thus keeping the battery fresh.
You'll be amazed at the sonic differences using 18VDC, it's cleaner, louder, and more dynamic. For standard 9 volt operation, the Fulltone IPS-9 is a great 9VDC regulated
wall wart adapter (for all countries) For 18VDC, make sure that you buy a regulated adapter like the Fulltone IPS-18. (for use in all countries)
Warranty: User assumes all risks and liability. and is responsible for any injuries and/or damages related to the use of this product. Fulltone products carry a Limited 5
year Warranty (to the original owner, non-transferable) with proof of purchase the product was bought from an Authorized Fulltone Dealer. There is no need to register
your product, simply keep a copy of your original sales receipt. The Warranty covers failure due to manufacturing errors only and is void if a modification or repair is
attempted by anyone other than Fulltone and/or if we deem that any operator-caused abuse or damage has occurred. If you are having a technical issue please do not
call your store. Instead, go to
For more info & videos go to and
2017 FMP Inc. All Rights Reserved
switching by opening up the pedal
Tone= set to preference Toggle= LP
Tone= set to preference Toggle= HP
Fulltone Musical Products Inc.
11018 Washington Blvd. Culver City, CA 90232
For sales related questions email
For repairs go to
(EB), this exclusive
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