The HMTwo - Distortion kit

Item number: 2194

High gain distortion pedal.

Category: Distortion


starting from 29,00 €

Final price incl. VAT, plus shipping (mitttel)


Shipping time: 3-7 Working days


A distortion pedal for classic 80's metal distortion. The classic Swedish buzzsaw sound. With level and distortion controls, plus a 2-band gyrator tone stack. With the tone control it is possible to produce a balanced sound as well as extremely thin or fat sounds.

This kit contains all parts you need to build a fully functional effect pedal.

Not included in the kit, but also very good to have:

  • Aluminium enclosure: select one above.
  • DC power supply
  • 4 nice knobs for the pots, 6,3mm shaft
  • Decal, transfer or transparent sheets for labeling

Instrument: Guitar
Effect-Type: Distortion Overdrive

Build documents

Installation guide: Installation guide

Schematic and pcb: Schematic

Parts list (BOM): Parts list

Ratings (16)

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The most useful review

4 from 4 Customers found the following product review helpful
4 from 5 Great sound, but needs improvements

I ordered this kit a few days ago.
Building was very easy, the PCB has a very good quality.
After comparing the original HM-2 schematic with this one, I detected a few flaws:
- the 10p feedback capacitors need to be 100p
- the tone pots need to be 10k lin, otherwise the tone controls have no effect between 0 and 8
- one filter caps have a higher rate originally (C19 / 100µ), although this is neglectible
- a feedback capacitor is missing (C21 / 470p bridging R22 / 3k3)
- a filter capacitor is missing (C22 / 47µ connected from the node where R30, R8, R12 and R13 are connected to the ground), although this is neglectible

., 06.11.2019
Total entries: 7
5 from 5 Neat build, true sound

Great easy to build kit. Sound is true to original, wall of chainsaw..
Beware that Ge diodes are glass cased and very fragile!

., 11.03.2019
5 from 5 Sounds almost like the real thing!

This build was a bit more complicated than what I was used to, but I didnt have any trouble with it.

Sounds really good! I compared it to my original HM2, and the sounds are pretty close. You would not be able to tell the difference in a live setting.

., 11.03.2020
1 from 1 Customers found the following product review helpful
5 from 5 Great Buzzsaw wall of sound

Since I discovered what kind of nasty pedal those guys were using to achieve those walls of distortion, I wanted it.
But really, the original ones are way too expensive in the used market so when this kit came up I was looking forward to put my hands on it.

The build has been nice and smooth,and the sound is what I was looking for, Im not sure the frequency response is completely faithful to the original, but I dont have an original one to compare it. Anyway I dont care too much, I can still manage to get the sound by tweaking the amp settings

., 16.05.2020
5 from 5 Excellent

Très fidèle à la HM-2 originale de Boss, plaisant à assembler et un plaisir encore plus grand à jouer.
Attention lors de linstallation des diodes germanium (OA1182), en pliant les pattes, le risque de casser le verre est grand... Au pire si vous avez peur de faire un faux pas, ce nest pas idiot den prendre une en supplément au cas où ici-même :
Boutons de potard oranges pour faire bien et cest tout bon !

., 27.03.2021
5 from 5 Good!

Great project! Pcb is excellent in workmanship, as well as the choice of components. The only minus point: the lack of a detailed assembly manual, with the exact location of the components. Its not difficult, to do it, but getting it out from the wiring diagram is inconvenient.

., 15.06.2021
5 from 5 Chainsaw and beyond

Easy to build and mod, sounds as expected. My only gripe is that the pots are CPB mounted, and requires fiddling a little to change the control layout.

., 25.01.2023
5 from 5 Great build

As long as you dont break the GE glass diodes (like I did), Its great and decently easy build.

Would recomend, price and quality are absolutely great

., 10.02.2024
Total entries: 7

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