The Duo-Phase was inspired by the most popular features of the iconic Mu-Tron Bi-Phase.
Controls
- Rate A – Sets the LFO speed of Phaser A
- Depth A – Sets the LFO depth of Phaser A
- Feedback A – Sets the regeneration of Phaser A
- Rate B – Sets the LFO speed of Phaser B
- Depth B – Sets the LFO depth of Phaser B
- Feedback B – Sets the regeneration of Phaser B
- Sync (Toggle switch) – Sets the LFO syncronization of Phaser B (Normal / Reverse)
- Sweep (Toggle switch) – Selects the LFO source of Phaser B (LFO A / LFO B)
Specifications
- Designed for a 1590XX / 6500 enclosure with top-mounted jacks
- Standard 9VDC operation (No special power adapter needed)
The company, product and service names used in this web site are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners. This product is not manufactured or distributed by Mu-Tron, maker of the Mu-Tron Bi-Phase.
PedalPCB is not affiliated with Mu-Tron.
| Weight | 1.25 oz |
|---|---|
| Dimensions | 2.4 × 5.45 × 0.5 in |
9 reviews for Duo-Phase
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Adam (verified owner) –
Two of a good thing. Great layout. I suggest a25k for the rate pots.
bjborchert93 (verified owner) –
This build was a great deal of fun. My favorite sound is both phasers on, but one set just a touch slower/faster than the other. I would agree that 25K pots for the rates might not be a bad idea because with the 50K pots, you have to be below 9 o’clock to really start to slow it down.
codiak82 (verified owner) –
Didn’t take as long as you would think from looking at the board, really great layout and use of space. Sounds even better, haha. Pretty versatile and a lot of fun. Highly recommend!
jacob (verified owner) –
Fun build, worked first go and sounds fantastic! Didn’t take nearly as long as I thought it might.
bjborchert93 (verified owner) –
This is my 2nd review. This is a REALLY cool phaser. It’s a large build and it takes patience to put it altogether. Even for an experienced builder; expect it to take 3-4 hours.
I’ve build two of these now now. I built one a couple of years ago and sold it to my buddy. After a couple of years, my Phase 90 clone wasn’t cutting it with the “cool” factor so I decided it was time to build myself another one of these.
I couldn’t really find instructions for how to set the trim pots, so I thought I’d share my process in case anyone else isn’t sure what to do.
Do one side at a time. Set the rate to almost all the way CCW. Now adjust the 10K trimmer so that the light doesn’t quite turn all the way off. This will avoid any annoying ticking sounds.
The 1K trimmer seems to adjust how bright the LED gets. This will affect the overall sweep of the effect. Just adjust it to your liking. It’s best to do this in a dark room so the sound won’t change too much when you put the back cover on.
Overall a fun pedal and a rewarding build!
markgd (verified owner) –
An excellent reproduction of the old Mutron Bi-Phase. One of my very first pedals and this build replicates that circuit nicely.
nmeadows (verified owner) –
A fun build and a really phenomenal phaser. Highly recommended. My only complaint, however, is that it doesn’t have the waveform shape control like the Mu-tron Bi-phase. Why not?? This pedal would be even cooler if it had that.
giovanni (verified owner) –
This is not a beginner build, just because of the large part count, some components being a bit tight together and the need to carefully position the LDRs. But once you are familiar with soldering and building pedals, it’s a very satisfactory build! Mine worked right away without any debugging needed. And it sounds great!
Catastopher (verified owner) –
This is a good one. The parts count is intimidating, but population goes pretty easily once you get started. A few people have talked about LFO ticking. I got that as well, even using shielded cable for all of the offboard runs from the board to the jacks and from jack to jack. I fixed it by routing the board-to-jack runs under the board. Nice and quiet now. The only reason I have four instead of five stars is because the indicator leds don’t pulse with the rate.