I’ve bid on quite a few of those on ebay, but never won one. I ended up buying a Pigtronix Mothership, which has quenched my Deluxe Octave Multiplexer desires for now. It would be fun to compare the two in a shootout. Both were designed by Howard Davis.

NOS = new old stock, vintage units that were never sold and sat in surplus. These usually fetch the highest prices because they are usually in pristine condition, despite being 25+ years old.

Yes, I’ve owned at least 3 or 4 of the 4-knob DMM models, but I currently have only one. It is normal for them to self-oscillate at noon on the feedback knob. This is the reason why they added the Squelch switch, to reduce the tendency. The 4-knob DMM is a very noisy and lofi model, which is simulataneously its charm and its downfall. Most people don’t want their echoes to sound quite that dirty, so the only musicians who buy them are usually enthusiasts or experimentalists.

Here are a couple of demos I recorded using the 4 knob DMM. This should give you a basis for comparison:

http://soundclick.com/share?songid=6720933
http://soundclick.com/share?songid=7213766

There haven’t been any sold on eBay in the last month, so I don’t see any completed listings. In general with EHX vintage gear, the prices vary quite a bit, depending on many factors – condition of the unit, if it’s NOS, feedback of the seller, international shipping availability, trends, seasons, etc.

My guess is that a functioning vintage 4-knob DMM can pull anywhere from $150 to $350, depending on those factors.

The chorus/vibrato knob on the original dmm can produce some crazy pitch shifting on the repeats, so maybe that’s what the expression input controls.

They don’t look original, but EHX used more than a few different knob-types back in the Seventies, so it isn’t impossible that they’re original, but not likely. Those look like stereo knobs.

My old 18v Electric Mistress also has the pots set in 3 different directions, so 50% ends being 9:00, 12:00, and 3:00 respectively. Pretty hilarious design. I think that’s normal for some of those older units.

I had the Tube EQ for several months, but finally sold it to fund another purchase.

The wah was very unique sounding and had a massively long sweep. I found it to sound more like a synth filter than a traditional sounding wah, which is not a bad thing unless you want a traditional sounding wah.

Try it in front of a wah or a phaser :love: Muffs always sound great with filters, IMO.