The Demedash Effects 112+ Preamp Driver mkII is a clean boost and distortion pedal built to respond the way a pushed preamp tube does. The maker describes it as "yielding a compressed & rounded drive character strikingly similar to the response of a heavily driven 12AX7 preamp tube." It is hand-made in Canada using top-quality components, and it sits in the broader family of distortion pedals while reaching into boost and overdrive territory through its gain modes.1
Gain modes and headroom
The pedal's core feature is a set of three selectable gain modes. Demedash says they "allow you to dial in vintage trebly jangle, mid-humped drive and fat distortion," so one pedal can cover lighter treble-forward boost, a mid-focused drive voice, and thicker distortion sounds.1
Under the hood, an internal voltage booster circuit gives the circuit 32 volts of headroom from a 9V supply. That extra internal voltage is part of how the pedal achieves its preamp-tube response at low operating voltage.1
The pedal draws 60mA at 9V DC, which is worth keeping in mind when planning a daisy-chain supply alongside other pedals.1
MkI versus MkII
The original 112 Preamp Driver MkI was released in February 2019. The MkII soft-launched in mid 2021, and Demedash describes it as "improving vastly on the dark sound of the original." The MkII's Drive control is also extended in both directions, giving "Cleaner cleans & thicker saturation" than the first version.1
Availability
The 112+ Preamp Driver mkII is listed as sold out on the maker's product page as of October 2026, at a list price of $205.00 USD.1
Videos
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Questions
What is the difference between the Demedash 112 MkI and the 112+ MkII?
The MkI was released in February 2019 and the MkII soft-launched in mid 2021. Demedash describes the MkII as improving vastly on the dark sound of the original, and the MkII's Drive control is extended in both directions, giving cleaner cleans and thicker saturation than before.
Does the Demedash 112+ run on 9V?
Yes. The 112+ Preamp Driver mkII runs on 9V DC and draws 60mA. Internally, a voltage booster circuit raises the headroom to 32 volts, which is part of how the pedal produces its preamp-like drive character.
What are the three gain modes on the Demedash 112+?
The three selectable gain modes let you dial in vintage trebly jangle, mid-humped drive, and fat distortion. Combined with the extended-range Drive control, they cover everything from clean boost territory to thick saturation.
Where is the Demedash 112+ Preamp Driver made?
Demedash Effects builds the 112+ by hand in Canada using top-quality components, according to the maker's product page.
What size enclosure does the Demedash 112+ use?
The 112+ Preamp Driver mkII uses a 125B size enclosure, a common Hammond-style housing for compact pedals.
Is the Demedash 112+ Preamp Driver MkII still available?
As of the maker's product page dated October 2026, the pedal is listed as sold out. Demedash Effects builds its pedals in small hand-made runs, so availability changes over time.
Sources (1)
- 112 Preamp Distortion, Demedash Effects
