DarkGlass B7K Limited Edition (Acid Toad) Analog Bass Preamp

The Microtubes B7K takes the powerful dynamic saturation circuit of the B3K and adds a four-band equalizer and a balanced line driver for even greater versatility. The artwork of this Limited Edition was done by the talented indian illustrator Acid Toad The finish is a laser engraved natural anodized aluminum unibody.

Level
Sets the volume of the overdriven signal.

Drive
Sets the amount of saturation in the overdriven signal.

Blend
Mixes the clean input signal with the overdriven signal. The clean signal remains at unity gain while the volume of the overdriven signal is set by the Level knob, allowing for fine control of the blend ratio.

Grunt Switch
Sets the amount of low frequency content to saturate by selecting between three different bass boost levels before the clipping stage.

Attack Switch
Sets the amount of treble content to saturate: The "Boost" setting emphasizes the treble content extra clarity and presence. The "Flat" position leaves this register untouched while the "Cut" position will reduce the amount of high frequencies being saturated.

Low
+-12dB @ 100Hz

Low Mid
+-12dB @ 1kHz

Hi Mid
+-12dB @ 2.8kHz

Treble
+-12dB @ 5kHz

Direct Output
A balanced version of the ¼” output, useful for running into PA’s or studio mixing consoles.

DIMENSIONS
12×10.7 cm (4.72×4.21 in)

WARNING
The Microtubes B7K has a current draw of 30mA. Only use a regulated 9V DC adapter with a center-negative plug. Due to ecological reasons it does not accept batteries. Unregulated power supplies and/or higher voltages may result in suboptimal noise performance and even damage your unit, voiding the