Vox Cooltron Over The Top Boost Tube Effects Pedal
Unique voices like no one else.... add a new tone to your guitar set up today!
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Blast your tone over the edge and back with the new Over the Top Boost pedal. The OTTB puts the top boost channel of a VOX AC30 into a pedal. The Treble control can take your tone from cutting attack at one extreme to smooth and l iquidy at the other. While the Bass control adds low-end girth at higher settings and a warm round smoothness at lower settings.
The OTTB even comes with a Cut control to add or remove higher frequencies at the turn of a knob. Vary the overall gain of the pedal from bluesy and mellow to fat and saturated. Or use the Standard/Custom switch to either make the EQ very interactive in Standard mode, or have it behave more like a traditional AC30 Hand Wired in Custom mode. You can use the OTTB as a booster pedal to drive the input of your amp by setting the Gain low and the Volume high. Conversely, set the Gain high and the Volume low for an overdrive from the pedal itself.
Want to know how it all works?
Normally, tubes are used at high voltages and this restricts their use in battery-powered devices such as guitar effects pedals. Historically, attempts have been made to use tubes at low voltages in what has been dubbed “starvation” mode, but these circuits don’t allow the tube to function in an acceptable manner. The tube simply cannot be biased to a satisfactory operating condition. Plus, the necessary heater (filament) current is too high to deliver acceptable battery life. Imagine how annoying it would be to have to change batteries every ten minutes during a gig!
Here’s what makes the COOLTRON system tick. The COOLTRON circuit basically operates by using two very special signal paths. The first is the “servo circuit,” which provides the right conditions between the plate of the tube and the grid. This achieves controllable, stable parameters for the tube and provides the correct operating conditions for the tube to function as it would if run at a higher voltage. The second circuit is a patented power supply that provides a low voltage, low current supply to the heater elements in the tube. Since the tube is now running at such a reduced supply level, the anode current is much smaller than normal. This means that the amount of heat required at the cathode to achieve sufficient cathode current emission is much smaller – hence the ability to run the heaters at a lower level and for COOLTRON pedals to run for 16 hours on 4 x AA batteries!
The COOLTRON system provides true tube sonic performance at very low voltage and at reduced heater current – ideal for inclusion into guitar effects pedals. COOLTRON guitar effects pedals offer valuable tube type sonic performance.
VOLUME:
This controls the overall volume (output) of the pedal.
BASS:
This adds low end girth at higher settings and a warm round smoothness at lower settings
CUT:
What this does is the opposite of what you may think. Turning it clockwise will decrease the higher frequencies and turning it counterclockwise adds higher frequencies.
TREBLE:
This will take your sound from a cutting attack at one extreme to smooth and liquidy at the other.
GAIN:
This varies the overall gain of the pedal from bluesy and mellow to fat and saturated.
STANDARD/CUSTOM Switch:
Ř Standard: When this is selected the EQ (Treble and Bass) becomes very interactive. As you increase the Treble or Bass, mids are decreased and conversely, as you decrease Treble or Bass, mids are increased just like a traditional AC30 Top Boost amplifier.
Ř Custom: When this is selected the EQ becomes less interactive like an AC30 Hand Wired or an AC15TB.
You can use the OTTB as a booster pedal to drive the input of your amp by setting the Gain low and the Volume high. Conversely, set the Gain high and the Volume low for an overdrive from the pedal itself.
GAIN:
This varies the overall gain of the pedal from mellow and warm to grinding and ripping or anywhere in-between!
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