Pricing and availability
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Average Price: $476
High-end/Boutique
$70
$201+
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Price History
Based on price data from 7 merchants for "Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp Pedal with Aux In". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Discover an unprecedented level of control over your bass tone with the Darkglass Microtubes B7K Ultra V2 Bass Preamp Pedal. Building on the robust saturation circuit of the B3K, this pedal adds a 4-band equalizer and a balanced line driver that elevates your direct sound. With its Grunt Switch, you can seamlessly set the amount of low-frequency content to saturate, ensuring your bass cuts through any mix.
This preamp pedal offers an independently switchable overdrive, with a Blend control to balance your dry tone and overdrive. The Attack switch allows for precise control over the treble content to saturate, providing a versatile palette of tone shaping possibilities.
Experience versatility at its finest with the addition of a balanced XLR output with switchable cabinet emulation. This feature enables you to achieve a full, amp-like tone by going direct to the sound system or recording chain. Plus, the Micro-USB port allows you to connect to your Mac or PC to load different virtual cabinet emulations for an even more customized sound.
Key Features:
- Preamp pedal for electric bass guitar
- 4-band EQ with switchable mid frequencies for wide tonal range
- Independently switchable overdrive with Blend control
- Attack and Grunt switches to control the treble and bass overdrive
- Direct output with switchable speaker cabinet emulation
- Headphone output with cabinet emulation
- Aux in for playing along to an external music player
- Micro USB port for loading different speaker cabinet emulations
- True bypass for pure and uncolored tone when the pedal is off
- Made in Finland.
Product specs
| Type | Bass Preamp |
| Form Factor | Pedal |
| Analog/Digital | Analog Overdrive with Digital Simulation |
| EQ | 4-band EQ, Low Mid Switch, High Mid Switch |
| Effects | Load Cabinet Simulation Impulse Responses (Darkglass Suite software) |
| Inputs | 1 x 1/4" (instrument), 1 x 1/8" (aux in) |
| Outputs | 1 x 1/4" (main out), 1 x XLR (direct out), 1 x 1/8" (headphones) |
| USB | 1 x Type Micro-B |
| Computer Connectivity | USB |
| Bypass Switching | Buffered |
| Power Source | 9V DC center negative power supply (sold separately) |
| Power Usage | 110mA |
| Height | 2.24" |
| Width | 4.92" |
| Depth | 3.77" |
| Weight | 0.94 lbs. |
FAQs
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What kind of tones can I expect from the Darkglass Microtubes B7K Ultra V2 for bass guitar?
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The Darkglass Microtubes B7K Ultra V2 delivers a versatile range of tones from clean and articulate to aggressive and overdriven, making it suitable for various genres, including rock and metal. Its 4-band EQ and switchable mid-frequency options allow for precise tonal shaping.
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Is the Darkglass Microtubes B7K Ultra V2 suitable for live performances?
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Yes, the Darkglass Microtubes B7K Ultra V2 is well-suited for live performances with its robust build, XLR direct output for easy DI connection, and versatile tonal options that can adapt to different live settings.
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Can I use the Darkglass Microtubes B7K Ultra V2 with headphones for silent practice?
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Yes, the Darkglass Microtubes B7K Ultra V2 features a 1/8" headphone output, allowing for silent practice without the need for an amplifier.
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How does the aux input on the Darkglass Microtubes B7K Ultra V2 enhance its functionality?
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The 1/8" aux input allows you to connect external audio sources, such as a smartphone or media player, enabling you to play along with backing tracks or practice sessions directly through the pedal.
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What power supply do I need for the Darkglass Microtubes B7K Ultra V2?
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The Darkglass Microtubes B7K Ultra V2 requires a 9V DC center-negative power supply, with a power usage of 110mA. The power supply is sold separately.
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Does the Darkglass Microtubes B7K Ultra V2 support cabinet simulation?
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Yes, the pedal supports cabinet simulation through impulse responses, which can be loaded and managed via the Darkglass Suite software, allowing for enhanced tone shaping and recording capabilities.
Videos
BassTheWorld.com
DARKGLASS B7K Ultra V2
Reviews
PROS
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Versatile tone options from clean to aggressive distortion
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Speaker emulation for realistic sound through headphones or PA
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USB connectivity for cabinet simulation loading
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Aux In for easy practice sessions
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Solid build quality with durable, metal construction
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4-band EQ with toggle switches for precise tone shaping
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Direct Output with cab sim for live or recording use
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Attack and Grunt switches alter distortion character
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Can replace a practice amp for apartment use
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Offers both analog warmth and digital flexibility
CONS
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Complexity may overwhelm beginners
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Cab sim selection requires a computer, not on-the-fly
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Headphone out volume linked to master volume, affecting usability with sensitive IEMs
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Clean channel quality perceived as inferior by some users
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp Pedal with Aux In.
Features and functionality
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The B7K Ultra V2 includes both a headphone out and XLR out, enabling silent practice or direct connection to PA systems.
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The B7K Ultra's EQ and dual switches allow for a wide range of tonal adjustments, from slight to aggressive overdrive, without losing bottom end.
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The Grunt and Attack switches are highlighted for their utility in shaping the distortion sound, providing a more tailored tonal experience.
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Software and compatibility
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The Darkglass Suite allows users to upload custom Cab Sims, offering flexibility in achieving desired cabinet sounds.
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Use cases and applications
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Direct connection to a PA system is possible without an amp or cab, streamlining live performance setups.
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The B7K Ultra is praised for its ability to provide a grumbly, edge-of-breakup sound that can be enhanced with additional drive pedals like the EHX Soul Food or Big Muff.
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The B7K Ultra is preferred for home use with headphones, offering a practical solution for silent practice without sacrificing tone quality.
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The pedal's headphone jack is emphasized as a key feature for home practice setups, reducing the need for additional equipment like amps or cabs.
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User experience
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The pedal's Cab Sim feature replicates the sound of various Bass Speaker Cabinets, eliminating the need for physical cabinets during performances.
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Owners report that Darkglass pedals, including the B7K Ultra, retain resale value well, making it easier to sell them if they don't fit one's needs.
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Comparisons
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Some users prefer SansAmp pedals for a warmer tone, while others find Darkglass pedals like the B7K Ultra more versatile in achieving a variety of sounds.
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The B7K Ultra's distortion is praised over the built-in options of the Microtubes amp, suggesting a superior tonal quality in the pedal.
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Value and pricing
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The B3K is suggested as a budget-friendly alternative for those who only require distortion and not the additional EQ and DI features of the B7K Ultra.
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In some regions, the B7K Ultra Limited Edition is notably cheaper than in the US, presenting a cost-effective purchase opportunity for non-US buyers.
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5.0 out of 5
Based on 0 Reviews and 5 Ratings
Artist usage
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Tyler Joseph used the Darkglass Microtubes B7K Ultra V2 Bass Preamp Pedal during the writing and recording of "Trench," as shown in his Instagram post detailing the creation of his home studio.
In a YouTube video titled "How to Get a CRUSHING bass tone! (w/ Adam 'Nolly' Getgood)" by Scott's Bass Lessons, Adam Nolly Getgood discusses his frequent use of the Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp Pedal with Aux In. At the 2:40 mark, Nolly demonstrates the pedal to highlight the difference between his clean and distorted signals. Additionally, in a separate 2019 demo review for Darkglass, Nolly provides further insights into his use of the B7K Ultra V2 pedal.
"My tone, I wouldn't say it's like one of those heavily distorted really fuzzy tones. It's almost like a really aggresive clean tone. It's not super distorted or anything. It give it an extra attack to it. The circuit in the B3K, B7K, and B7K Ultra is something I've been using for quite a few years."
During a performance by Turnstile on The Tonight Show Starring Jimmy Fallon, Franz Lyons' pedalboard is visible at the 1:46 mark, clearly showing the Darkglass Electronics Microtubes B7K Ultra Bass Preamp (v1 or v2).
"Darkglass is part of every show, 'My current rig is a dual channel Sennheiser EM 2050 wireless into a Radial JX62 switcher feeding a fractal audio Axe-Fx II with a Microtubes B7K Ultra in the FX loop', he tells us. 'The Axe sends two signals to front of house, It sends one direct signal that runs through a tube pre and a sub cab sim, the other is an amp channel with an Ampeg SVT model, the Microtubes B7K ultra and another cab sim. I send a 3rd line direct from my Microtubes 500. We blend the 3 tones and its by far my favorite bass tone I have ever had. We have no actual Cabs on stage so being able to run the microtubes 500 without an ohm load is perfect!'"
En la esquina superior izquierda de la foto podemos ver el Darkglass Microtubes B7K Ultra V2, el cual es un muy buen preamplificador
In a 2022 interview with Bass Magazine, Takahiro Yamada is shown using the Darkglass Microtubes B7K Ultra V2 Bass Preamp Pedal as part of his pedalboard, which is detailed in both image and description.
In an interview with RichardMetalFan, Max Green confirms that he has used the Darkglass Microtubes B7K Ultra V2 Bass Preamp Pedal.
In a 2021 Rig Rundown video with Arde La Sangre on YouTube, Marcelo Corvalán is shown using the Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp. The video, created by Doble Bobina, features Corvalán discussing the gear he utilizes for his bass setup.
Album Usage
The Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp Pedal with Aux In has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Darkglass Electronics Microtubes B7K Ultra V2 Bass Preamp Pedal with Aux In, it is most commonly used with the following gear.
Community setups
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