Okko Diabolo / Diabolo Plus

The Diablo is a versatile low to medium gain overdrive with an exceptionally dynamic response.
It preserves the character of your instruments and is very sensitive to your playing technique.
Thanks to the effective and musical controls, the Diablo works equally well with any kind of guitar,
amp or playing style. People use it for so many different sounds, you would hardly believe
that they use the same pedal.
Besides the usual Gain, Tone and Level knobs, the Diablo has some more interesting controls:
FEED affects the amount of bass in the input signal. You know the problem: an overdrive sound
gets muddy rapidly if the input signal is too bass heavy (that’s why the treble booster was invented).
With the FEED control you can make even the fattest neck humbucker sound clear
and transparent or beef up weak pickups a little.
The BODY control takes effect on mids and compression.
Another important feature is the HEADROOM SWITCH. Set to the „HI“ position,
an internal electronic voltage doubler is activated – the Diablo runs on 18 Volts
from a regular 9 V battery or power supply.
The higher voltage gives more dynamic range, more headroom and
tighter bass – just try it!

has a double function as a pre-gain control and affects the amount of bass in the input signal.
You know the problem: an overdrive sound – regardless of whether itʼs an amp or a pedal –
gets muddy rapidly if the input signal is bass heavy (thatʼs why the treble booster was invented).
The solution: the Feed control thins out the signal when turned counter-clock-wise.
Youʼll hear the result right away – even the fattest neck humbucker sounds transparent without
ever getting muddy.
1-2 oʼclock is a good starting point.
takes affect on mids and compression. Turn it to the left for a more transparent and open or the
right for a fatter, singing sound. Actually, I could have called this knob „FEEL”…
controls the intensity of distortion. Set it to the desired level of distortion and roll back the guitar
volume for cleaner tones.
+ (DIABLO GAIN+ only)
controls the 2nd gain level. This control works in addition to the GAIN control. If the gain is already
set to maximum, the „+” doesnʼt add distortion anymore, just a slight fattening of the sound.
is useable throughout its whole range from dark to bright. You can further fine-tune the sound with
the internal trimpots (see below)
Iʼm sure youʼll find out what this control does…
activates an internal voltage doubling circuit.
LO: for a softer tone and more compression, good for pickups with low output and playing at
bedroom level
HI: louder, less compressed, more dynamic and punchy sound with tighter bass – better suited
for more powerful pickups, in front of an already distorting amp and for playing on stage volume
PRESENCE controls the high frequencies. Decrease for a smoother tone or increase for a cutting
BASS controls the bass and lower-mid frequencies.
The Diablo can be run on a 9v battery or a power supply.
The power supply has to be a regulated 9VDC adapter with the 2.1 mm „barrel plug” and negative
center pin (standard for the very most pedals of Boss, Ibanez, Fulltone and many other pedals).
The headroom switch activates an internal circuit that electronically doubles the supplied voltage
(i.e. 18 volts from a 9 volts battery or power supply).
DO NOT SUPPLY AC, you will definitely damage the pedal

€ Dibolo 199.- Diabolo+ 239.-