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Darkglass Electronics Microtubes B7K Analog Bass PreAmp

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Darkglass Electronics Microtubes B7K Analog Bass PreAmp

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$349.99 Price Tier: High-end

5.0 (38)

6 Reviews

This product is Vintage or Discontinued

Newer option

Darkglass Electronics Microtubes B7K V2

$319.00 - $399.99

5.0 (8)

Find out who is using Darkglass Electronics Microtubes B7K

3 community setups

42 wishlisted

119 saved

Page last updated Jul 05, 2026

Pricing and availability

We compare 600+ stores and found this item at 2 stores. Prices updated July 5, 2026.

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Reviews

Price

5.0 (26)

$349.99 2 available New

$250.00 4 available Used

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£329.00

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Average Price: $300

High-end/Boutique

$70

$201+

Price Tier

In the Bass Effects Pedals category, Darkglass Electronics Microtubes B7K Analog Bass PreAmp is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

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Description

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Unleash the power of your bass with the Darkglass Electronics Microtubes B7K Analog Bass PreAmp. This versatile beast is engineered with a unique hybrid JFET/CMOS gain circuit design, delivering the warmth of vintage bass tube amps. Its four-band EQ provides granular control over both low and high mids. With the addition of boost/attack switches, you can not only increase volume but also control bite and treble. From the iconic Ampeg to the classic Plexi overdriven sounds, the B7K offers a wide palette of tones while also offering enough tweakability to create your own unique sound. An indispensable addition to your rig, the B7K stands up to the demand for quality and versatility.

Key Features:

Hybrid JFET/CMOS gain circuit design
Four-band EQ with detailed control over low and high mids
Boost/attack switches for volume control and bite/treble adjustment
Able to emulate classic bass overdriven sounds from Ampegs to Plexis
Ample tweakability for creating unique sound

Product specs

Brand	Darkglass Electronics
Model	Microtubes B7K Analog Bass Preamp
Finish	Black, Black with Beast Graphic, Silver with Joker Graphic
Year	2010s
Made In	Finland
Categories	Bass Effect Pedals, Preamps

FAQs

What type of sound can I expect from the Darkglass Microtubes B7K Preamp?: The Darkglass Microtubes B7K Preamp is known for delivering a versatile range of tones, from clean and transparent to aggressive and overdriven. It excels in enhancing the low-end punch and clarity, making it ideal for modern rock and metal bass tones.
How does the Darkglass Microtubes B7K handle different bass guitars?: The B7K is designed to work well with a variety of bass guitars, providing consistent tone shaping and overdrive capabilities. Its EQ and drive controls allow for customization to suit different basses and playing styles.
Can the Darkglass Microtubes B7K be used as a standalone DI?: Yes, the Darkglass Microtubes B7K can function as a standalone DI, making it suitable for both live performances and studio recordings. It features a balanced output for direct connection to mixers or audio interfaces.
Is the Darkglass Microtubes B7K suitable for slap bass techniques?: The B7K is well-suited for slap bass, thanks to its ability to maintain clarity and definition even with aggressive playing. Its EQ controls help accentuate the percussive elements of slap bass, enhancing the overall sound.
Does the Darkglass Microtubes B7K require a specific power supply?: The Darkglass Microtubes B7K requires a standard 9V DC power supply, with a center-negative plug. It is recommended to use a high-quality power supply to ensure optimal performance and noise-free operation.

Videos

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MrExcane

Darkglass Electronics Microtubes B7K Bass Overdrive - BASS Demo

MrExcane

Does It Groove - Darkglass Microtubes B7K

Rob Chapman

Darkglass Microtubes B7K Analog Bass Preamp - DEMO

Victor Hugo Targino

Microtubes B7K Bass Preamp/DI demo by Will Davies

Darkglass Electronics

Reviews

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PROS

Shapes sound with versatile grind options without losing low-end
Extra outputs enhance signal chain and studio possibilities
Capable of bypassing the amp, ideal for home studios
Delivers a range of tones from clean to full distortion while maintaining clarity
4-band EQ and blendable drive circuit for precise tone shaping
Retains fundamental signal and adds natural-sounding overdrive
Versatile for both subtle warmth and aggressive distortion
Useful for both live and studio settings, across genres
Can be paired with other pedals for enhanced tone

CONS

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Darkglass Electronics Microtubes B7K Analog Bass PreAmp.

Features and functionality

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The B7K Ultra's switchable midrange frequency options allow for tailored tonal shaping, making it a standout feature for rock and metal bassists.
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The B7K's EQ is noted for its ability to fix scoop issues from distortion, offering more tonal control compared to the VMT.
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Use cases and applications

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The EQ/preamp of the B7K is favored for tone sculpting and light drive, with users often boosting mids for a more cutting gain that punches through mixes.
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The B7K Ultra excels in live settings; users recommend maximizing low and high mids to create a powerful presence in a jam room.
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The B7K is suitable for hard rock, delivering a distinctive growl that complements aggressive playing styles.
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Owners find the B7K's versatility extends beyond metal, suitable for genres requiring clean tone shaping or mild saturation like jazz and classic rock.
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The B7K Ultra can replace an amp's preamp section, with users plugging directly into the effects return for a purer tone.
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It's highlighted that the B7K Ultra is not just a metal-centric pedal, but also effective for clean genres, showcasing its broad applicability.
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User experience

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Owners note that the blend control is highly effective, allowing natural bass tones to mix with the pedal's effects without losing low end.
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The VMT Deluxe is recommended for its comprehensive tone controls and integrated DI, beneficial for versatile playstyles across genres.
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After owning the B7K Ultra for six months, users report its impressive range of tones, making it a staple despite having other reliable pedals.
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Comparisons

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Some users prefer the B7K Ultra over the B7K for its additional drive toggle, making mid-song adjustments more feasible.
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The B7K is praised for its aggressive mid-range grind, particularly suited for heavy metal, contrasting with the VMT's vintage-voiced preamp ideal for funk and jazz tones.
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Owners who tried both Darkglass and SansAmp note that the B7K Ultra offers more tonal versatility with its EQ compared to Tech21 models.
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Some owners mention the B7K Ultra's specific distortion character as a "flavor of dirt" that fits their sound needs better than competitors.
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5.0 out of 5

Based on 6 Reviews and 38 Ratings

5 star

4 star

3 star

2 star

1 star

dimas_agung

over 1 year ago

The tone what i need

This pedal is amazing, This pedal can make a low tone for My bass

Roles:

Bassist

Genres:

Metal

cody_linder

269

over 9 years ago

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.

Roles:

Singer Guitarist Bassist

Genres:

Electronic Rock Orchestra

bennohoundsuk

253

over 7 years ago

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!

Roles:

Bassist

Genres:

Rock Metal

thomasgrell

almost 10 years ago

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.