EHX - Metal Muff  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
User avatar
soulsonic
Old Solderhand
Information
Posts: 3880
Joined: 27 Jun 2007, 03:38
my favorite amplifier: Traynor YVM-1
Completed builds: too many!
Location: Morgantown, WV
Has thanked: 179 times
Been thanked: 458 times
Contact:

Post by soulsonic »

mecmast wrote:hi all. this is my first message i guess :) i was looking for the layouts and pcb of this pedal. should anybody help?
I don't think anyone has done a DIY project of the Metal Muff (yet).
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

User avatar
eleanor296
Information
Posts: 14
Joined: 13 Jun 2008, 04:59

Post by eleanor296 »

Note the "Metal Rules" underneath the input jack.
Got the same on mine when I took it apart before I sold it.
I laughed :mrgreen:

By the way... I really liked this pedal. Played several gigs with it in my old power metal band (we opened up for some cool bands, including In This Moment... if you're into this kind of sound that is... I'm not anymore).
My other guitarist played a Randall and then a Mesa Dual Recto, and I could hang with both of those using my MM and a Fender Hot Rod Deville :twisted: .
Funny world, huh?


~Andy

User avatar
bumblebee
Diode Debunker
Information
Posts: 719
Joined: 18 Aug 2007, 00:05
my favorite amplifier: ‘65 Twin Reverb
Completed builds: Fuzz, Distortion, Preamps….gain gain gain.
Location: Temporary Hiatus
Has thanked: 207 times
Been thanked: 45 times

Post by bumblebee »

Just updating the thread with the schematic again cause I changed names of folders in my photobucket account a while back and it destroyed all the links I posted to schematics etc.
:D

schematic removed
If you can’t buy it, build it. If you can buy it, clone it.

User avatar
sadrew
Breadboard Brother
Information
Posts: 148
Joined: 08 Apr 2008, 08:45
Location: London UK
Has thanked: 9 times
Been thanked: 14 times

Post by sadrew »

is the schematic verified? maybe i can try to make a layout

User avatar
bumblebee
Diode Debunker
Information
Posts: 719
Joined: 18 Aug 2007, 00:05
my favorite amplifier: ‘65 Twin Reverb
Completed builds: Fuzz, Distortion, Preamps….gain gain gain.
Location: Temporary Hiatus
Has thanked: 207 times
Been thanked: 45 times

Post by bumblebee »

Verified? its a genuine Electro harmonix schematics dude.
I shouldn't even be posting it in its current form, it needs re-drawing to escape legalities.
If you can’t buy it, build it. If you can buy it, clone it.

User avatar
celadine
Solder Soldier
Information
Posts: 201
Joined: 22 Aug 2007, 06:12
Has thanked: 16 times
Been thanked: 19 times

Post by celadine »

Yes, a certain you-know-who will be sending photobucket an email soon... :whappen:

User avatar
DimebuGG
Solder Soldier
Information
Posts: 218
Joined: 02 Sep 2008, 11:37
Location: Doha, Qatar
Has thanked: 8 times
Been thanked: 198 times
Contact:

Post by DimebuGG »

"W" tapers, what kind are those?. :scratch:
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy

User avatar
bumblebee
Diode Debunker
Information
Posts: 719
Joined: 18 Aug 2007, 00:05
my favorite amplifier: ‘65 Twin Reverb
Completed builds: Fuzz, Distortion, Preamps….gain gain gain.
Location: Temporary Hiatus
Has thanked: 207 times
Been thanked: 45 times

Post by bumblebee »

Just fixing the broken links for the schematic.


schematic removed- EH factory schems can no longer be posted on this site.
If you can’t buy it, build it. If you can buy it, clone it.

User avatar
DimebuGG
Solder Soldier
Information
Posts: 218
Joined: 02 Sep 2008, 11:37
Location: Doha, Qatar
Has thanked: 8 times
Been thanked: 198 times
Contact:

Post by DimebuGG »

soulsonic wrote: In comparison, I tried the Metal Muff out at a store a few months back and I thought it sounded terrible. It reminded me more of a Metal Zone (another pedal I HATE) than a Grunge.
You're absolutely right!. Metal Muff is indeed a Metal Zone rip off with fixed parametric mids. EH just added a Top Boost shit and removed the FET buffer. I never thought of it!!!Damn..

http://www.godiksennet.com/images/sch/mt2-06.jpg
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy

User avatar
vir
Information
Posts: 7
Joined: 10 Mar 2009, 10:07

Post by vir »

metal muff is just a clone of metal zone they just fixed the mid freq.control,the other"popular pedals" that are clone of the metal zone are DOD/digitech grunge(no mid and mid freq. control)death metal(same as grunge but with mid freq. gyrators and control added to the tone control)danelectro fab metal is a clone of grunge(with the bass control fixed at 3 oclock settings via a 75k and22k resistors instead of a pot and the tone contol in the middle is just for treble) a couple of danelectro,yesarov,etc.etc, so why they sound different the answer lies on the components used(ic's capacitors,pots and resistors)they are just "Sons of a goddamn metal zone" with different personalities. :twisted:

User avatar
soulsonic
Old Solderhand
Information
Posts: 3880
Joined: 27 Jun 2007, 03:38
my favorite amplifier: Traynor YVM-1
Completed builds: too many!
Location: Morgantown, WV
Has thanked: 179 times
Been thanked: 458 times
Contact:

Post by soulsonic »

:hmmm: So, you're saying I could mod a Metal Zone to be like a Grunge? Definitely an improvement! :lol:
People love to hate on the Grunge, but I could be stuck with only one of those to use at a gig and be able to get by just fine. They can actually do a sorta okay Marshall-ish crunch with the gain down. And they clean up well. I remember my band in high school would do some Alice in Chains stuff, and I was able to fake the sound pretty decent with a Grunge. I mean, that's what it's meant for, right? :lol:
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

User avatar
m0jo
Information
Posts: 14
Joined: 16 Apr 2009, 14:34
my favorite amplifier: Laney VC100
Completed builds: m0jo Muff of Death: SHO -> Muff Fuzz (with voltage knob and asymetrical 3mm blue led clipping)

Electro Harmonix Doctor Q speed mod -> faster reaction

Boss SD-1 Keeley mod + diode board (for choosing led, gemanium diode, germanium tran, russian nos diode, 1n914, 1n4848)

Boss CEB-3 -> adapt low pass filter for guitar range.
Location: Netherlands
Contact:

Post by m0jo »

Hi guys, any chance of a layout for this?

I played it today and it kicks most amps straight out of the water :shock: we compared it with the Bugera for fun :applause: the MM completely murdered it :twisted:
SparkPlug .. FunkyPunkRockMetal

User avatar
The President
Information

Post by The President »

I'm not an electronics engineer but how can the MM be a an MT-2 when the schematics show the MM has 4 x 4558 opamps, 6 x MMBT 5962 bi-polar transistors, and the MT-2 does not? MT-2 doesn't even have as many opamps and transistors as MM. Did I go blind again?

User avatar
DimebuGG
Solder Soldier
Information
Posts: 218
Joined: 02 Sep 2008, 11:37
Location: Doha, Qatar
Has thanked: 8 times
Been thanked: 198 times
Contact:

Post by DimebuGG »

The President wrote:Did I go blind again?
maybe yes.. :lol:
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy

User avatar
himister
Resistor Ronker
Information
Posts: 425
Joined: 07 May 2009, 00:48
Has thanked: 21 times
Been thanked: 28 times

Post by himister »

analogguru wrote:Dod and Digitech always have been the same company....
I would assume that the Diugitech Grunge is the SMD version of the FX69B...

analogguru
If the Digitech Grunge is the SMD version of FX69 then Digitech Death Metal could be the SMD vesion od FX86B.
Just to say I owned a Digitech Death Metal few years back and I opened one, interesting thing was that the same pcb was used for both.
It was printed on pcb Digitech Grunge/Death Metal. If any one has it, you could see it below the pedal cover when changing batteries, there's a switch and through hole around the switch you can see what's printed! :lol:

So any guts for Metal Muff? :lol:

:thumbsup

User avatar
rasta_maleek
Resistor Ronker
Information
Posts: 258
Joined: 11 Jul 2009, 12:56
Has thanked: 52 times
Been thanked: 52 times

Post by rasta_maleek »

hi from spain, i´m looking for long time this schem but i didnt have much luck, any can help me or send to me this schematic??
thank at all.

User avatar
RnFR
Old Solderhand
Information
Posts: 4880
Joined: 09 Jan 2008, 06:02
my favorite amplifier: Traynor YBA-III, Fender Super Six
Completed builds: custom fuzz.
Location: Inner Earth
Has thanked: 139 times
Been thanked: 133 times
Contact:

Post by RnFR »

when The Sword played at my club both of the guitar players were playing through metal muffs. i found it rather surprising- they had great tone. not what i would expect from a metal zone clone.
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic

Blog-APOCALYPSE AUDIO

User avatar
ubaid88
Information
Posts: 13
Joined: 09 Nov 2009, 05:05
Been thanked: 4 times

Post by ubaid88 »

I found schematic of Metal Muff and simplified it a bit and here it is.
Image
Anyone interested ?

User avatar
elrengofa
Breadboard Brother
Information
Posts: 56
Joined: 28 Aug 2008, 04:06
Been thanked: 29 times

Post by elrengofa »

hey, nice schematic

could you upload it in eagle file ? i will try to make a pcb

sorry for the inglish, im from argentina

User avatar
ubaid88
Information
Posts: 13
Joined: 09 Nov 2009, 05:05
Been thanked: 4 times

Post by ubaid88 »

Thanks for your interest.
Here are eagle files zipped.
http://www.2shared.com/file/10129554/2d ... _Muff.html

And the original schematic.
Image
In case if there are errors in schematic drawn in eagle.
sorry for the inglish, im from argentina
No problem Dude. My Native language is also not English.

Post Reply