¡Obtenga asesoría en español!  Llámenos hoy a (800) 222-4701
(800) 222-4700 Talk to an expert!
Press Space or Down Arrow to open the quick shopping cart menu. Press Escape to close the menu and return to the Shopping Cart link.
Loading Cart
Your Cart Is Empty

See what's new at Sweetwater.

My Cart this.cartQty

Darkglass Luminal Booster Ultra Bass Preamp Pedal Certified Open Box , $449.99 - Add to Cart Skip to Product Information

Darkglass Luminal Booster Ultra Bass Preamp Pedal Certified Open Box

Bass Preamp Pedal with Compressor, 6-band EQ, Footswitchable Cut/Boost, IR Cab Simulation, and XLR DI Output
Darkglass Luminal Booster Ultra Bass Preamp Pedal
Darkglass Luminal Booster Ultra Bass Preamp Pedal

Certified Open Box Savings!

Save $50 What is Certified Open Box?

The price below reflects your savings.

Savings: $50.00 New for $499.99

! 6 people have this Certified Open Box item in their cart. Order now before it's gone!
Ask An Expert Our Expertly trained Sales Engineers are ready to help! What is a Sales Engineer?
Darkglass Luminal Booster Ultra Bass Preamp Pedal Certified Open Box

Certified Open Box Savings!

Save $50 What is Certified Open Box?

The price below reflects your savings.

Savings: $50.00 New for $499.99

Premium Dynamics Control and Tone Shaping

This article was Written By

Our Product Research Team

Get to know them!

The Darkglass Luminal Booster Ultra combines high-precision dynamics control and broad-gauge tone shaping, supplying bassists with a potent pipeline to their personal creative nirvana. This pedal’s studio-quality compressor offers numerous options for imaginative processing, while a bass-tailored graphic EQ puts six bands of premium sonic sculpting at your fingertips. You also get variable Mid Gain and Mid Frequency knobs for dialing in your midrange, a Character knob for blending in the tone-shaping circuitry, and a flat +/-20dB footswitchable Cut/Boost. The Luminal Booster Ultra includes an XLR DI output and a 7-slot IR loader, granting you access to a formidable cache of award-winning cabinet simulations. Moreover, this bass preamp’s built-in headphone amplifier and stereo auxiliary input facilitate silent practice sessions, complete with backing tracks. A handy ground-lift feature rounds out the Luminal Booster Ultra. Bassists in need of an all-in-one pedalboard-based preamp with ample tone tweaking will get all that — and more — from the Darkglass Luminal Booster Ultra.

Studio-quality compression

One of the Luminal Booster Ultra’s brightest highlights is its full-featured compressor. It not only provides you with comprehensive dynamics control, but thanks to its flexible 4-knob layout, it also gives you ample character-shaping choices. The Filter knob provides you with an adjustable lowpass filter for your compressed signal, while the Comp knob sets the amount of compression applied. Meanwhile, the Blend knob enables you to strike the perfect balance between your clean and compressed signals. You also get a Gain knob that controls the compressor’s post-Blend output level.

Versatile tone-shaping circuitry

Bassists at Sweetwater who play a lot of different styles appreciate the Darkglass Luminal Booster Ultra’s flexible tone-shaping circuitry. For starters, you get a +/-20dB Mid Gain knob and a variable Mid Frequency knob for dialing in your midrange. Next, a 6-band graphic equalizer, which includes low-shelf and high-shelf sliders, gives you exacting control over your overall frequency curve. You also get a Master level slider to compensate for extreme boosts or cuts. Finally, the Luminal Booster Ultra’s Character knob allows you to blend in the pedal’s tone-shaping circuitry according to your individual preferences.

Built-in cabinet simulation

To make the Luminal Booster Ultra pedal a complete tone solution for bassists, Darkglass equipped it with its award-winning IR-based cabinet simulation. This state-of-the-art IR loader includes seven Cab Sim slots, which are accessed by pressing on the Character knob, allowing you to route the sound of a miked cabinet out the pedal’s XLR DI output for straightforward connection to a PA system or recording setup.

Darkglass Luminal Booster Ultra Features:

  • Combines high-precision dynamics control and broad-gauge tone shaping
  • Studio-quality compressor with flexible 4-knob layout offers numerous options for imaginative processing
  • Bass-tailored graphic EQ puts 6 bands of premium sonic sculpting at your fingertips
  • Variable Mid Gain and Mid Frequency knobs for dialing in your midrange
  • Character knob blends in the pedal’s tone-shaping circuitry according to your individual preferences
  • Flat +/-20dB footswitchable Cut/Boost
  • 7-slot IR loader grants access to a formidable cache of award-winning cabinet simulations
  • USB-C port connects to your computer for loading impulse responses
  • XLR DI output routes the sound of a miked cabinet to a PA system or recording setup
  • Built-in headphone amplifier and stereo auxiliary input facilitate silent practice sessions with backing tracks
  • Handy ground-lift feature makes short work of ground loop hum
What is Certified Open Box Gear?

At Sweetwater, we're so picky that what we call "Certified Open Box" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

Certified Open Box (also known as a demo) means we’ve had it out of the box for our YouTube channel, displayed at events, tested in our studio, or maybe it was in a customer’s hands for a few days and isn’t ‘factory fresh’ as a result. Every Certified Open Box item we sell has Sweetwater’s 2-year Total Confidence Coverage™ warranty and has been tested and verified up to ‘new’ specs by our factory-authorized technicians to make sure it’s in perfect working order before we ship it to you.

When you buy a Certified Open Box item at Sweetwater, you get:
  • 2-year Total Confidence Coverage Warranty™!
  • Products inspected and tested by our factory-authorized techs, guaranteed to function like new (or better)!
  • FREE shipping on most items
  • Equipment that will MEET or EXCEED your expectations!

Click HERE to browse our current inventory of Certified Open Box equipment. Purchasing Certified Open Box gear from Sweetwater is a smart and safe way to save!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.