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DSM & Humboldt Simplifier MkII Amp & Cab Simulator Pedal

Zero-watt stereo guitar amplifier with built-in reverb. Delivers pure analogue amp tones from a portable, pedalboard-friendly package!



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Product Description

DSM & Humboldt's original Simplifier was a huge hit; offering guitar player's premium amplifier tones on the go. This sleek, stylish "amp-in-a-box" and cab sim pedal came equipped with a host of pure analogue parameters and useful stereo connections — allowing you to craft your own unique sounds with a hands-on, visceral approach.

The DSM & Humboldt Simplifier MkII takes that amazing amp simulation experience to a new stage of realism, boasting many more options while keeping the instant touch and dynamics that only an all-analogue device can manage. And best of all? It's packed into the same ultra-compact footprint that'll easily fit onto any pedalboard!

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What's New with the Simplifier MkII?

Preamps to the Limit!

Completely redesigned preamps with wider gain options:

  • 'AC Brit' preamp minimises the Mid control range, resulting in a more accurate historic behaviour — akin to a Vox AC30 '64 "Top Boost" channel.
  • American 'USA' preamp is now based on a true classic, the Fender '59 Bassman.
  • 'MS Brit' delivers a new level of gain, just like a hot-rodded Marshall Plexi.

Power Amp Drive

  • A new dedicated power amp drive allows you to dial-in the perfect amount of power amp compression, for that "sweet spot" that only a tube amp can achieve.
  • The power amp is a highly-detailed reproduction of a Class A/B power stage, including the phase inverter. Each power type reconfigures the feedback path, PI gain and the effect of the power transformer on the emulated power tubes.
  • A clip indicator shows when the emulated power tubes are clipping, helping you to find the desired sweet spot between power drive and preamp drive, as it would be on an actual tube amplifier.
  • In combination with the Master Volume control, you can get any amount of pre and power amp drive at any volume level!

Master Section

  • Master Volume control allows you to set any amount of pre and power amp drive at any volume level, avoiding unwanted FX loop distortion.
  • Redesigned Presence control within the power amp feedback. Clockwise, it boosts the high mids like Marshall and Fender amps. Counter-clockwise, and it cuts the highs like a Vox amp.
  • Redesigned Resonance control allows you to set the low-end thump straight into your PA system or audio interface.

Stereo Cab Simulator

After countless hours of comprehensive research, looking at hundreds of response curves from the most renowned speakers in the market, DSM & Humboldt completely redesigned the Simplifier's Cab Sim section; replacing the Mic position control for a more useful and intuitive three-profile speaker control:

  • Black: Based on the V30 Speaker.
  • Blue: Based on the Blue Alnico Speaker.
  • Green: Based on the G12 Greenback Speaker.

There are also three classic cabinet types to choose from:

  • Combo (1x12" Blackface-style cab)
  • Twin (2x12" AC-style cab)
  • Stack (4x12" 1960-style cab)

Built-In Reverb

According to many Simplifier users, one of the most desired features on the original unit was a built-in reverb, or at least a Room control. DSM & Humboldt answered the call by loading our their Simplifier MkII with a side-chained digital plate reverb.

Updated Enclosure

With a redesigned layout for an easy tone-shaping experience and fantastic connectivity, the Simplifier MkII is optimised to be the perfect brain for your pedalboard. DSM & Humboldt have also introduced a brand new heavy-duty, all-aluminium enclosure — with all-metal switches for maximum endurance.


  • Voltage: 9 to 12V DC regulated (2.1mm DC jack, centre negative)
  • Current consumption: 150mA (recommended supply current of above 200mA)
  • Input Impedance: 1Meg Ohm
  • L & R Return Input Impedance: 1Meg Ohm
  • Send Output Impedance: 1K Ohm
  • Unbalanced Outputs Impedance: 4.7K Ohms
  • Balanced Outputs Impedance: 100 Ohms
  • Power: 135mW into 32 Ohms (use with 16, 32, 64 and 96 Ohm headphones)
  • Dimensions: 120 x 70 x 45 mm (4.7 x 2.7 x 1.8 inches)
  • Weight: 360 grams (0.8 lb)

Customer Reviews


13 reviews





Mr Roberto Pini10th Apr 2024

Value 5Looks 5Durability 5Sound 5

Mr Paul Graves15th Mar 2024

Excellent piece of well built kit that feels great to play through and has very authentic sounds

Value 5Looks 5Durability 5Sound 5

Brendan D12th Mar 2024

A great sounding audio interface with a lot of options for an analogue unit.

Value 4Looks 4Durability 4Sound 5

Trusted Customer9th Jan 2024

The Simplifier Mk2 is a great piece of kit. I play in an electric/acoustic covers band and play both types of guitar through a common pedal board. The Simplifier works really well as an amp sim/di box in this situation giving great sounds without the need for a backline amp and the feedback issues that would result. A very clever piece of kit! The only thing that would improve it is a way of being able to boost the gain via a footswitch.

Value 4Looks 4Durability 4Sound 5

Trusted Customer29th Dec 2023

Amazing variety of sounds!

Value 5Looks 4Sound 4

Mr ukasz RaczySki1st Nov 2023

It failed to be used in live situation with direct comparison to real tube amp. I will not dare to go with this thing to jam session, and I was hoping to do so. I can feel kind of the latency with the whole signal chain to the PA front of house and wedges. Sound is thin. I keep this only as a practice amp at home. For pracitce amp when traveling there are better options. Phones output barely usable - it is so damn loud. Plenty of features but only few usable. I don't like the reverb neither - too intense. I keep it almost at zero.

Value 1Looks 3Durability 3Sound 3

Mr Keith Miller1st Nov 2023

Have only used at home so far. So far very pleased with the result. Have great expectations of it performing in a live situation.

Value 4Looks 4Durability 4Sound 4

Mr Juan Ros Gojo31st Oct 2023

I love the Simplifier MkII. Previously used the MKI but this one is just so much better.

Value 5Looks 5Durability 5Sound 5

Trusted Customer2nd Sep 2023

Value 5Looks 5Durability 5Sound 5

Trusted Customer22nd Aug 2023

I was able to get the sound out of that I was expecting.

Value 3Looks 5Durability 4Sound 3

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.