PRESENCE: Just like the Supergroup, the Sabbra Cadabra features a Presence control that dumps a varying amount of frequencies to ground. The result is a full-bodied master tone control that helps you sit in the mix right where you like.

VOL 4: LOUD. This thing gets LOUD. Did I say LOUD?

GAIN: Think of this as an analog to the Supergroup’s Gain control. Keep it low for some crunchy British-style chunk or crank it to get those tube-melting tones that Mr. Iommi is known for. Setting this above 3 o’clock definitely gets you into Dehumanizer territory.

RANGE: This control knob influences the front-end treble booster of the Sabbra. This circuit's design is derived from our Naga Viper, a system comprising three knobs: Boost, Heat, and Range. In the Sabbra, Boost and Heat settings are maximized, providing mastery over the Range, which acts as an input frequency selector. Frequency selection in treble boosters is achieved by channeling the signal through a small input capacitor that trims the low end. The Range control oscillates between two input capacitors—one small, one large—ensuring the Sabbra's drive side operates with the appropriate frequencies.

The Sabbra Cadabra requires at least 9VDC and up to 18VDC, with a negativecenter. It draws a miserly 5mA, meaning you can run it with pretty much any supply fitting theabove requirements. You can also use a 9V battery, just remember to unplug the input cablewhen you’re finished, or it will continue to use battery power. However, the modest current drawwill let the battery last a good long time.