Featuring a hybrid JFET/CMOS gain circuit design, a four-band EQ with minute control for low mids and high mids and boost/attack switches for adding volume while also controlling bite and treble, the Darkglass Electronics Microtubes B7K is an expansive overdrive built to emulate the warmth of vintage bass tube amps. Able to dial in classic bass overdriven sounds from Ampegs to Plexis while also housing enough tweakability to easily create your own sound, the B7K is an essential staple in any rig where the utmost in quality and versatility is needed.

Product Specs

  • Microtubes B7K
  • Black
  • 2010s
Made In
  • United States

From the Price Guide

Reviews for the Darkglass Electronics Microtubes B7K
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  • Crushing

    This is like a SansAmp on steroids. The bottom four knobs are a 4-band eq for a preamp which sounds frankly amazing-- and the top three knobs are a blendable drive circuit which is completely over-the-top in terms of the amount of gain that's on tap, but the clarity always remains. It has two 3-pos…

  • Superb Device!

    Verified Purchase

    The Darkglass B7k is essentially a B3k on steroids . It is extraordinarily versatile and the quality control is spectacular . it sound gud

  • The best preamp there is!

    Verified Purchase

    This thing gives you everything you need if you’re not willing to spend the money on the ultra version. The one feature the ultra has that this doesn’t is a foot switch for the drive. Otherwise this pedal is amazing! You can have as much overdrive or as little as you want. You can decide what part…

  • F*****g AWESOME!

    Verified Purchase

    This is hands down the best Preamp I have ever played. It brings incredible clarity into my tone. It will punch through any mix. Then, at the turn of a knob, it brings the most heavy growl any rock or metal bassist could ever want. This preamp plays very nicely with other effects, especially fuzz. This pedal is a must have.

  • YES

    Verified Purchase

    I play heavy tunes and the mix is usually dense. This makes the low end growl while making mid and treble presence super clear so you can hear my nastiness. Anyone who doesn't like this pedal is either using it wrong or doesn't play it with the correct style. Or maybe they have an opinion of their o…