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by Jim Button June 24, 2022 5 min read
The fate of the Boss Heavy Metal HM-2 looked certain to fade into history, but remarkably it has gained a cult-like following in recent years. Today, original made-in-Japan versions can sell for over £200.
The Heavy Metal HM-2 holds the distinction of being the first distortion pedal tuned specifically for Metal, released in 1983. It was designed to emulate the sound of a Marshall stack but used some interesting circuit and component choices which resulted in a unique design. Manufactured in Japan until 1988, manufacturing was then relocated to Taiwan. Boss subsequently discontinued the pedal in 1991, citing poor sales as a reason.
Although players as distinguished (and distinct) as Prince, Eric Clapton, Johnny Marr and David Gilmour have all used the Boss Heavy Metal HM-2 to great effect at various points in their careers - giving it more mainstream exposure than the moniker "Heavy Metal" would suggest - the HM-2's turning point was arguably the 1990 release of Entombed's Left Hand Path, which spawned a whole new signature sound thanks to the HM-2.
Formerly known as Nihilist, the Swedish Death Metal band changed its name to Entombed when bassist Johnny Hedlund left to form Unleashed in 1989.
Entombed's debut studio release, Left Hand Path, was noted as inventing the "buzzsaw", "chainsaw" or "Gothenburg" sound, although it is said to have actually been developed during Nihilist demo sessions by bassist/guitarist Leif "Leffe" Cuzner.
The sound on Left Hand Path was achieved by detuning to B, cranking all the dials on the Boss HM-2 up to maximum and running it into a solid-state Peavey combo amplifier, treated with some rackmount compression at the desk. The result was an instantly recognisable aggressive, in-your-face sound.
When Tomas Skogsberg of Sunlight Studios in Stockholm, where Entombed had recorded Left Hand Path, introduced the concept of a dimed HM-2 to other Swedish Death Metal bands who came through the studio - such as Dismember, Carnage and Grotesque - it began to gain popularity in the wider Metal community and its unique sound could soon be heard on albums recorded across Scandinavia and beyond.
Various bands adjusted the recipe slightly, some using the HM-2 as a boost into a Marshall valve amp or even into a Boss Metal Zone MT-2 or a second HM-2. But in most cases, the EQ was run at maximum to take advantage of the HM-2's unique EQ section and get the most gritty, cutting sound possible.
The Heavy Metal HM-2 is a surprisingly versatile distortion pedal despite its Metal leanings, thanks to its incredibly powerful console-style EQ which features 3 band-pass filters. These enable the user to boost - or cut - each frequency band by up to 20dB into narrow, focused peaks or troughs.
In the hands of Swedish Death Metal bands, it was typically used without much finesse: cranking every knob. This actually worked very well, especially in the context of Metal. Two strong peaks at around 88Hz and 1kHz create a scoop at around 200-300Hz, which tightens up the sound considerably - perfect for fast chugging and searing solo runs.
Because of its unique EQ, the HM-2 has a less expansive sound than almost any other distortion pedal, which naturally leaves space in the mix for other instruments - perfect when recording and playing live.
[product=kink-guitar-pedals-oath-of-the-goat]
The Kink Guitar Pedals Oath Of The Goat brings 80s "chainsaw" metal tones up to date, with suitably demonic graphics to match the sounds it produces. Mark from Kink Guitar Pedals says, "The HM2 is an interesting effect. There are so many tone options available, but people seem to only use the iconic Swedish sound. When I came out with the Oath, I was getting into my pedal collecting. The prices people were paying blew my mind. I figured I could offer something with some Kink personality at a fair price and I'm happy with how it turned out."
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[product=kma-machines-wurm-2]
The KMA Machines Wurm 2 is an update on the company's original Wurm, which pays its respects to the legendary heavy rock and metal pedal, the Boss Heavy Metal HM-2. The Wurm 2 takes the HM-2's legendary dual-band EQ and expands it to 4 bands, giving you maximum tweakability - ideal for getting your sound to sit perfectly in a mix or live-band situation. Each band has an internal trim-pot to shift its semi-parametric centre frequency to fine-tune your tone even further. A new internal dipswitch has been added to the Wurm 2 to activate an input filter which tames the high frequencies, smoothing it out and reducing feedback issues, especially when everything is maxed out in true HM-2 fashion.
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[product=kma-machines-guardian-of-the-wurm]
The KMA Machines Guardian Of The Wurm is the ultimate HM-2-style pedal thanks to its 4-band active EQ, noise gate and built in effects loop. The EQ-Style toggle allows you to set the overall character: "HM-II" mode gives the classic high-mids sound; "KMA" mode has a wider, more balanced response; "Both" doubles up the tone stack for the best of both worlds. The feature-packed, dual-footswitch Guardian Of The Wurm includes 3 clipping modes and a clean blend, while an External Trigger input allows noise gate control from an external source. And you don't need to be in a band with a name inspired by the occult to click with the Guardian Of The Wurm - the likes of Prince, Johnny Marr and David Gilmour used the HM-2 to great effect during their careers.
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Although the HM-2 defined a genre, it was not enough to prevent Boss from putting the brakes on - in 1991 the pedal was discontinued. It was only in the late '90s and early 2000s that the HM-2 reached a bigger audience than ever, partly thanks to Kurt Ballou.
Kurt Ballou is a founding member of American Metalcore band, Converge. Since 1990 he has been the group's guitarist. In 1998 he established GodCity Studio. Ballou has been one of the biggest proponents of the HM-2 over the last couple of decades, bringing it and its many boutique versions to the attention of a new generation of musicians who have passed through his studio.
Despite its merits, there are a few drawbacks to the original Heavy Metal HM-2.
As mentioned at the beginning of this article, prices for as-new made-in-Japan HM-2s are beginning to get out of hand.
Since these are now at least 30 years old, leaky components and value drift can be a thing, meaning your HM-2 may not sound as it was intended when it left the factory.
The HM-2 is a noisy bastard - its infamous white noise is constantly there in the background, while the feedback it induces causes squealing at every given opportunity (some might argue this is part of its charm!).
The Distortion control is notoriously useless, only making a difference in the last portion of its travel. Probably the reason it was usually left at maximum.
Boutique versions of the Heavy Metal HM-2 have taken it upon themselves to improve the original design, whether by adding further EQ controls for finer control, additional clipping options, and even noise gates.
Mark from Kink Guitar Pedals says, "It makes me happy to see the variations that have come out from other builders. I like it when a builder's personality comes out through their pedals."
At the end of 2021, Boss released a much-anticipated Heavy Metal HM-2 Waza Craft version.
by Jim Button April 18, 2023 12 min read
by Guest Author August 26, 2022 3 min read
by Guest Author February 14, 2022 9 min read
This Pedal is easy to use and has many sweet spots! Perfectly tuned combination of two legendary circuits! Highly recommended!
super fun trem, decent sound, huge volume. havent spent a lot of time messing about with it, but did have a play with the slide and drift feature which are a nice bonus. cant wait to have more time to play around with it.
Boost Guitar Pedals are great as always, fast delivery
been playing it a few days now, and have it set up so it works with with whatever i thow at it. its in my chain after OD but Before Distortion. feedback dial is great and can have it very far clockwise before it sends you in an infinity loop, mix is a bonus, i haven't messed about with the shapes much yet because i found a dreamy setting i dont want to change. would highly recommend isolated power suppy, it did not like daisy chain or cheap single wall one, but works smooth with isloated brick
Boost Guitar is great again to got it within 24 hours of shipping
Perfect for that traynor amp growl on bass. There’s a lot of scope with gain and EQ controls (which sound ace wherever you dial them in). Had the Tronographic Rusty Box before this which I regrettably had to sell; this is a perfect (and smaller, less power hungry) substitute.
I spent months searching for an affordable vibe pedal that actually sounded authentic.
Not only does this have the very sound that I was after, without a ton of tweaking, but it is priced reasonably too. It is not at the cheap end of the market, but for a hand-built pedal with dual speeds this is unbeatable.
The sound is spot on. Warm and rich with the throb missing from many of the lower-priced pedals. The second speed makes it easy to switch between chord and solo settings.
The delivery was amazing too - ordered in Friday afternoon and delivered on Sunday morning!
I can’t recommend this highly enough to anyone looking for the best univibe around.
add another 5 stars, im no pro but i know what sounds i like and the Bloom is the sound i like. ive had Boss BD2, donner dumble drive, Tumnus and Tumnus deluxe but to me The Bloom tops them all. its a well built easy to dial in. having full gain is so clear and not nosiy. only tried with my strat single coils atm. the distortion isint the best but im comparing it to the Drunk Beaver Batv2 and have a feeling that its a layer distortion for another distortion pedal. fuzz is lush. the chip and fat switch really bring it to live and gives you more options for sound. i cant believe this is made by 1 guy. To me Drunk Beaver are up there with the best pedal makers. could send hours going on about the great things. and im only useing a boss katana mk2 no tube amp but you can get some faux tube headroom with the right switch. if you like the demos, well i got good news, it sound way better in person
Boost Guitat Pedals are great too, fast delivery, great communication. couldnt ask for a better store
Bone white Davies 1611
The Bleak District Tapescape is one of the best delay and ambience style pedals ever invented. The controls are all intuitive but highly flexible, the sounds are rich and detailed, the modulation can go from dreamy to nightmarish very quickly, and all of that inside a small footprint with a low power requirement. It's difficult to get a bad sound out of it, honestly.
Add in that Boost shipped it out quickly and it arrived with a nice note written on the invoice, is there anything else you could ask for? Definitely will be buying more from both Boost and Bleak District in future.
Part came as described. Website was easy use.
very cool pedal
Awesome service and communication all along!
Will gladly order again
I ordered a set of strings from Boost, that did not initially turn up. After contacting Boost via the website they immediately sent out another set (no questions asked). Both sets arrived a few days later (Thanks Royal Mail!). Boost were prompt in dealing with the issue (gave) me a set of strings and got things sorted out. Highly recommend you use these guys.
My favourite strings, at a great price! Very reasonable postage rates and speedy service. My first purchase from Boost, but will definitely not be my last. Hassle free, excellent...
Jazzmaster happy🙏
I didn’t know that particular manufacturer from Italy, but I definitely recommend their "Vintage Vibe”. It’s simple, intuitive, it looks awesome, the build quality seems impeccable, and most importantly, it sounds fantastic.
Pre-ordered the Tapescape through Boost Pedals. Great pedal, great order experience
I'll be away from my pedalboard from 6th - 18th April...but you can still browse!
I'll ship all outstanding orders on Friday 19th April.
All the best,
Jim