“The guitar was well packed and is set up to my liking! I would definitely do business with this company again!”
Darkglass B7K Ultra V2 Bass Preamp Bass Guitar Pedal (Aux In) - Floor Model
Sale price$382.00Regular price
$449.99
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14-day returns
Changed your mind? Return it undamaged within 14 days.
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Ships from Rapid City, SD. Free on orders over $100.
11,000+ five-star reviews on Reverb
Trusted by players nationwide since 1963.
Ships same or next day
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The upgraded Microtubes B7K Ultra features all the versatility and sonic possibilities of the first version plus: (1) Single user loadable cabinet simulation impulse response. (2) Micro-USB B port to connect to PC/Mac to load a different Virtual Cabinet through the Darkglass Suite. (3) 3.5mm headphone output with cabinet simulation. (4) Balanced XLR output with switchable cabinet simulation.
Buy risk free with our 14 day - full refund, less shipping, return policy. Check out our shop policies for more details.
With the Microtubes B7K v2 you get all the features of the original, with the ability to better sculpture your tone: on the low mids you have the option to change the center frequency from 1KHz to 500Hz, and on the high mids you have the option to change the center frequency from 3kHz to 1.5kHz. This will enable you to tailor your absolute dream distortion tone.
The character and core of the Microtubes B7K remains the same, still retaining 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.
- 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.
- Level: Sets the volume of the overdriven signal.
- Drive: Sets the amount of saturation in the overdriven signal.
- 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 Mids Switch: This switch change the center frequency of the Low Mids from 1kHz to 500Hz.
- Low Mids: +-12dB @ 1kHz
- Hi Mids: +-12dB @ 3 kHz
- Hi Mids Switch: This switch change the center frequency of the Hi Mids from 3kHz to 1.5kHz.
- Treble: +-12dB @ 5kHz
- Parallel Output: A passthrough for your input signal, useful for parallel processing.
- 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 v2 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.
B7UV2A
Customer reviews
11,000+ Five-Star Reviews On Reverb
What players say after the guitar arrives
“This is a beautiful guitar…appreciate the free setup and quick ship! Would purchase from this seller again…THANKS!”
“Thank you too for a wonderful experience and an amazing guitar. I appreciate the quick shipment and great customer service.”
“Very fast shipping, arrived in perfect condition, extremely well set up, no adjustments needed at all! Plays and looks great, exactly as advertised.”
“Fast shipping, and great communication from the seller. Pedal arrived quickly and was packaged really well. Would not hesitate to buy again.”
Very well packed! Would be happy to do business again! Thanks!
“Another masterpiece from Taylor. Great service and communication from Haggerty’s crew. Thanks!!!”
“Beautiful guitar, easy txn! Thank you so much! Looking forward to playing this guitar far into the future.”
“Fast shipping, great pedal. Buy with confidence these guys are great to work with!”
“Great shop! Awesome price, super fast shipping, and great packaging of an awesome new pedal! Thanks!”
Frequently Asked Questions
Do you set up every guitar before it ships?
Yes. Every guitar that leaves our store has been professionally inspected, set up, and signed off by the technician who worked on it. You will find a signed checklist inside the box when your order arrives.
How accurate are your condition descriptions?
We treat condition grading as a contractual promise, not an approximation. When we list something as excellent, that reflects a specific, consistent standard we apply across every instrument. We encourage you to call us before purchasing if you want a detailed in-hand description of any specific guitar.
Can I call and speak to someone about a guitar before I buy?
Yes, and we encourage it. Our team are working musicians, not order-takers. Call us at 605-348-6737 and ask about any instrument in our inventory. We will physically pull it off the wall and describe it to you in detail.
What is your return policy?
We offer a 14-day return policy if you change your mind and the item is returned undamaged. You are responsible for return shipping costs.
Do you offer financing?
Yes. Financing options are available at checkout. Monthly payment options are designed to make high-ticket purchases more accessible without requiring full payment upfront.
How do you ship instruments?
Every instrument ships fully insured from our store in Rapid City, South Dakota. We offer free shipping on all website orders over $100. Guitars are packaged to survive transit, properly cased, braced, and protected.
Are you an authorized dealer?
Yes. We are an authorized dealer for Taylor, Martin, Gibson, Fender, and many other brands. We are currently the number one independent Taylor Guitars dealer in the world, an award we have received two years running for 2024 and 2025. We are also a Top 10 premium dealer for Martin, Gibson, and Fender.
Do you sell on Reverb and Amazon as well as your own site?
Yes. We are one of the top 15 resellers globally on Reverb, where we have accumulated over 11,000 five-star reviews. We are also one of the only independent premium dealers in the world authorized to sell Taylor and Martin on Amazon.
How long have you been in business?
Haggerty's Music has been open since 1963. Our store is located at 515 Mount Rushmore Road, Rapid City, South Dakota.
Do you offer instrument repair?
Yes. Our certified technicians handle everything from routine setups to full restorations across fretted, orchestral, and band instruments. Our team holds certifications from Taylor Guitars, Yamaha, and other leading brands. Learn more HERE.
What brands do you carry?
Our core guitar brands include Taylor, Martin, Gibson, Fender, PRS, Epiphone, Suhr, Eastman, Gretsch, Luxxtone, Novo, Jackson, Charvel, Legator, and Yamaha among others. These are also the most searched brands on our site, so each has a dedicated collection page.
Do you offer music lessons?
Yes. We offer music lessons. You can find out more HERE.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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2520 W Main St, Rapid City, SD 57702.
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