Darkglass Electronics Darkglass Microtubes B7K Analog Bass Preamp Pedal
Top-notch analog bass preamp with a 4-band EQ.
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. Designed for both studio and live... read more
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Reviews
Trusted musician and artist reviews for Darkglass Microtubes B7K Analog Bass Preamp Pedal
Based on 5 Reviews

a great recomendation.
A friend let me borrow his when I was gigging with my band at the time, he gave me a quick tutorial then away I went and apparently I had quite school boy face on me once I heard the distortion at full volume, that was certainly a night to remember, I like to use it along side the Sansamp and together they make a handsome tone!

Grind Box Of The Gods!!
This is a pedal that has done wonderful things for both my live and studio tone. Its a great pedal to add a lovely subtle 'glassy' overtone to your bass, or full on distortion. It retains all your original tone and allows you to add the distortion on top. Its super for nearly any genre, and if the B7K is too modern for you, the Vintage Microtubes might be more your speed. I'm never getting rid of this pedal. Ever.

Favorite all-around overdrive
I primarily use the B7K for fingerstyle passages. All around great OD.

The must have Preamp
If you play bass get this preamp , no question
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Details
Description
Top-notch analog bass preamp with a 4-band EQ.
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. Designed for both studio and live use, it will take your direct sound to a whole new level.
Controls
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 œBoost setting emphasizes the treble content extra clarity and presence. The œFlat position leaves this register untouched while the œCut position will reduce the amount of high frequencies being saturated. This addition helps to keep the treble portion of the signal under control, specially useful when playing with new strings and/or cabinets with tweeters. (Low: +-12dB @ 100Hz / Low Mid: +-12dB @ 1kHz, Hi Mid: +-12dB @ 2.8kHz / Treble: +-12dB @ 5kHz)
Specifications
- Direct Output: A balanced version of the 1/4" output, useful for running into PA's or studio mixing consoles
- 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 warranty.
- Dimensions: 12 x 10.7 cm (4.72" x 4.21")
The Pinnacle of Overdrive Pedals
If there was ever one pedal that I would never be without on my signal chain, this would definitely be it!
I've been using this pedal for about a year now and the tone I get from it is unparalleled to any pedal I've ever heard or played through. It respects the fundamental signal coming from your bass while adding a natural-sounding overdrive to the signal, giving a natural, non-synthetic sounding tone without sucking out the low frequencies. It's also rather versatile; you can be subtle with it and dial the drive back to get a warmer, more vintage-style tone. Or you can crank the drive to deliver a brutal assault of grinding distortion that modern rock and metal bassists tend to crave.
Lately I've been recording with the pedal's parallel output so I get a track of the sound of the B7K along with a clean DI track, and the recording sounds amazing. Worth a try, and you cannot even tell they're separate tracks, as the two separate tracks are synonymous with each other.
Either way, I highly recommend this pedal if you're looking for a top-of-the-line modern bass tone that you will be hard-pressed to find anywhere else. It's worth the money.