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CONNECTIONS AND CONTROL
FEATURES
Potentiometers:
Drive: Adjusts the input impedance (gain) and
thereby the distortion level.
Output: Adjusts the output volume level.
Rotor Balance: Adjusts the balance of volume bet-
ween the tweeter and bass rotary speaker.
LEDs:
Flashing LEDs: The right LED indicates the speed of the
upper rotor, the left LED the speed of the lower rotor.
Tube Sat: This LED illuminates at the threshold of tube
saturation, i.e. when the signal starts distorting.
Effect On: This Led illuminates green when the effect
is activated.
Slow/Fast: This LED illuminates when the device is set
to slow speed.
Switches:
Slow/Fast: Selects the speed range to either slow or
fast. A couple of trim pots let you adjust the FAST
speed separately for the woofer and horn. These two
trimmers are located to the left and right of the
BALANCE knob. Use a small screwdriver to adjust
them. Feel free to try out different settings for the two
rotors and dial in the combination of speeds that you
like best.
Breaker: The button that controls the BREAKER
function was replaced with an on/off switch. While
the old model required you to hold the button down
with your foot to arrest the rotary action, now you
can simply activate and deactivate the BREAKER at
the touch of a button. That frees up your foot to
operate other effect devices or, in the case of
organs, bass pedals.
When you stop the rotary action, the simulated
woofer and horn always return to the same default
position. This ensures that varying rotor positions don’t
color the sound of the pedal and that you get
consistent tone when you use the Tube Rotosphere
purely as a tube preamp.
Bypass: Switches the overall effect on and off.
Rear panel:
Input Right/Mono: mono signal input or right stereo
signal input jack Sensitivity: -20 to + 10 dB; input
impedance 1 M ohms
Input Left: left stereo signal input jack Sensitivity: - 20
to + 10 dB; input impedance 1 M ohms
Output Right/Mono: mono signal output or right stereo
signal output jack Level: 0 to + 12 dB; impedance 3 K
ohms
Output Left: left stereo signal output jack Level: 0 to
+ 12 dB; impedance 3 K ohms
Mode Switch: Adjusts the impedance and pre-EQ
filtering for either keyboard or guitar.
Remote: stereo jack for external Bypass and Slow-Fast
switch. (tip = Bypass; ring = Slow-Fast switching)
Power Supply: input jack for the included power pack
(12 volt, 750 mA).
RECOMMENDED APPLICATIONS AND
STANDARD CONNECTIONS
1. Keyboard mono:
Use a cable equipped with standard 1/4” plugs to
connect the output from your keyboard to the
ROTOSPHERE mono input. Connect the ROTO SPHERE
mono output to your keyboard amp´s input or your
mixing console´s Line In.
2. Keyboard mono to stereo:
Connect your keyboard to the ROTOSPHERE input as
described above and connect the ROTOSPHERE
outputs to the stereo Line In jacks at your stereo
keyboard amp or mixing console.
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