Here are the specs: USA/Canada model: 18.5VACX2 250mA. Here are the pinouts with diagram and voltages.
My PSU measurements are in AC volts, there is a negligible voltage between the metal connector and any pin, and I checked for DC voltages in all combinations, and found none. These are AC voltages! Also note, that the power supply says something about a 3V 100 mA output, but there is absolutely no evidence of it.
My power supply came with my Xenyx802 and it is labeled “Eurorack power supply”. I found that a bit odd. Here are the other labels:
ITEM NO: PSU-MX3-UL-01
INPUT: 120V~60Hz 14W
OUTPUT 1: 18.5V~ X2 250mA
OUTPUT 2: 3V~ 100mA
MADE IN CHINA
The voltages are :left pin to center pin: 20.7VAC
right pin to center pin: 20.7VAC
left pin to right pin: 41.9VAC
(no other measurable voltages anywhere).
I own both a Eurorack UB802 and a Behringer Xenyx 802, and the PSU which is pictured above, says on it MXUL3 (this is not a typo), is from the Xenyx 802, and works on either mixer.
Here is what the user manual to the Xenyx 802 says about the Power supply:
—————– >8 user manual start ——————
Power consumption 13 W
Adapter: Behringer PSU MX3UL (yes, this is not a typo)
mains voltage 120V~,60Hz
Adapter Behringer PSU MX3EU
Mains voltage 230V~, 50Hz.
—————– >8 user manual end ——————
Here are a few weird things I have noticed.
1. There really is no 3V rail that is used on the power supply
2. There are many variations of power supplies out there, some say 3V, others leave it off, some say 13W
3. With a Eurorack with no power supply, I have great interest in creating one. One day I plugged an 18 Volt AC supply into two pins, and the Eurorack seemed to function. My guess is the other two pins are for the phantom supply. When I say “seemed to function”, it seemed to mix all channels to the main mix bus, with no problems, and no noticeable distortion.
3. I was tired of a mixer with only two pre-amps so I connected the two mixers together using only one power supply. It was a simple matter of connecting the power supply line from one mixer’s preamp to the same place on the other mixer. The reading on the first pre-amp was about 23 or 24 volts DC. I used only two wires, one for positive, other for negative. The funny thing is that the 2nd mixer works beautifully, and I tried ALL its functions, except phantom power, and the interesting thing is that the 2nd mixer’s heatsink was very very cool. So my guess is that there is a circuit which creates the phantom power that accounts for almost all of the heat generated by these little mixers. Just an interesting observation.
4. Noting item 4 above, my guess is a similarly connected 24 volt DC supply might possibly power one of these machines, and bypass all that circuitry that makes things hot.
5. If you read this, please leave a thanks, share the luv!