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DSM Humboldt Electronics Simplifier Bass Master Preamp Certified Open Box , $323.10 - Add to Cart Skip to Product Information

DSM Humboldt Electronics Simplifier Bass Master Preamp Certified Open Box

2-ch Bass Preamp Pedal with 4-band EQ, 3 Preamp Voices, Drive Mode, Dual XLR DI Outs, Dual FX Loops, 3 Cab Sims, Parallel LPF, Aux, and Headphone Jack
Item ID: BassMasterd1
DSM Humboldt Electronics Simplifier Bass Master Preamp

Certified Open Box Savings!

Save $35.90 What is Certified Open Box?

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$ 323 .10
Savings: $35.90 New for $359.00
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DSM Humboldt Electronics Simplifier Bass Master Preamp Certified Open Box

Certified Open Box Savings!

Save $35.90 What is Certified Open Box?

The price below reflects your savings.

$ 323 .10
Savings: $35.90 New for $359.00

Simplify Your Stage Rig and Expand Your Tonal Palette

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Our Product Research Team

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Building upon DSM Humboldt’s fan-favorite Bass Station, the Simplifier Bass Master preamp is a pedal-sized powerhouse that’s packed to the brim with authentic, ultra-versatile tones and features. Whether you’re a dedicated funk player or you’re after a pint-sized replacement for your hard-rock rig, the Simplifier Bass Master’s trio of preamp voices (Clean, Comp, and Hot), gain-fueled Drive Mode, and robust 4-band EQ tackle almost any style without breaking a sweat. 1 x 15-inch, 8 x 10-inch, and 4 x 10-inch sim options run the gamut of bass cab flavors, which are further bolstered by the Simplifier Bass Master’s Porting knob, Tweeter level, and switchable Warm/Bright/Modern speaker styles. What’s more, this preamp accommodates rigs ranging from plug-and-play simplicity to sprawling pedalboard with its dual FX loops, DI Main and DI Parallel XLR outputs, twin TS outs, aux input, and headphone jack with dedicated level control. With the DSM Humbdolt Simplifier Bass Master on your ’board, you can rest assured that your bass rig will be ready to thrive in any sonic situation.

Three hard-hitting preamp voices to savor

Every element of the Simplifier Bass Master is engineered for the utmost sonic versatility, beginning with Clean, Comp, and Hot preamp flavors. From classic funk to modern grind, these preamps do it all with ease — especially when you factor in the harmonic-rich dirty sounds introduced by the preamp’s Drive Mode and onboard gain control. Finally, Sweetwater’s obsessive tone-tweaking bassists champion the Simplifier Bass Master preamp for its sweeping collection of tone-shaping features, comprising a 4-band EQ and a parallel signal mix with 500Hz/100Hz/bypass settings. Combined with the preamp’s three voices, these tools ensure that you’ll have the tones you need to tackle even the most disparate setlists, all within a form factor that sits right on your pedalboard.

Comprehensive cab sim section

The Simplifier Bass Master packs a seriously robust cab sim section at the end of the signal chain, granting you an ultra-accurate trio of sims and all the tonal tools you require to shape them to your taste. It all starts with a 3-way size switch with options for 1 x 15-inch, 8 x 10-inch, and 4 x 10-inch cab sims. Even on their own, these simulations supply you with a sweeping range of tones to explore. Yet, the Bass Master ups the ante even further with its ability to customize the amount of porting on the baffle from punchy sealed sounds to airier open textures. A flexible speaker switch seals the deal, putting three distinctive speaker variations at your command: Warm, Bright, and Modern.

Effortlessly integrates your effects

No matter how complicated your effects setup is, the Simplifier Bass Master preamp is happy to oblige with its exceptionally flexible and full-featured connectivity. This pedal’s dual FX loop consists of a pre-FX loop and a main FX loop, with the former giving you the power to assign it to the preamp, the parallel signal chain, or both paths at the same time. This allows you to inject different effects into each side of the Bass Master preamp’s parallel paths without the need for extra splitter cables. In addition, this preamp sports both a Main and a Parallel XLR output — this allows you to easily send two distinct signals to your cab, a separate subwoofer, or to FOH, or into your audio interface. And for those who prefer to practice plugged in, the Simplifier Bass Master preamp’s headphone out and auxiliary input make it a breeze to silently sharpen your chops in any situation.

DSM Humboldt Simplifier Bass Master Features:

  • Builds upon DSM Humboldt’s Bass Master preamp with years of research and development, resulting in superior versatility and a more straightforward workflow
  • 3 preamp voices to explore: Clean, Comp, and Hot
  • Drive Mode and gain control take your signal from subtle saturation to crushing grit and grind
  • Ultra-flexible 4-band EQ section with Bass, Treble, Lo Mid, and Hi Mid knobs
  • 3 lifelike cabinet simulation flavors to explore: 1 x 15-in., 8x 10-in, 4 x 10-in.
  • Powerful cab sim controls allow you to dial in the cab’s degree of porting, level of the tweeter, and the style of speaker (Warm, Bright, and Modern)
  • Parallel XLR DI outs pair with dual FX loops, including a pre-FX loop and Main FX loop
  • Pre-FX loop can be assigned directly to the preamp, to the parallel signal chain, or to both paths at the same time
  • Bypassable parallel lowpass filter trims your tone with the flip of a switch, with options for 500Hz and 100Hz
  • Headphone out and auxiliary input make it simple to jam along to practice tracks and bolster your woodshedding sessions with inspiring, silent sounds
  • 2 TS outputs with Parallel-Thru and Parallel-Thru jacks; onboard Parallel Phase switch
  • Ground lift helps you defeat unwanted noise and 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.