Hello .. I bought a behringer eurorack mx 802a on eBay without powersupply... Based on research the powersupply thst comes with it is 18v for 2 of the pins (xlr) at 800 mah. However the powersupplies being sold on eBay for it is 17v for 2 pins at 600mah... Can those eBay power supplies work?
Hi! Is that 3 pin connector power supply needed to get phantom power? I have Behringer Xenyx 502 but no power Adapter. Its very difficult to find 3 pin connector adapter for replacements. Can i just use 2 wires 18.0 volts from laptop charger to power up the mixer? i dont need Phantom power for mic. Thanks!
I haven't seen the internals of the mixer, so I don't know how it generates the phantom power. I imagined that the centre-tapped AC would make it easier to generate symmetrical +/- DC rails around GND, which are often needed to drive op-amp circuits. I think it's likely this unit has a whole bunch of op-amps inside it. You can get compatible power supplies on ebay for Behringer mixers, but they're often much more expensive than they should be for what is basically just a transformer.
it needs an ac to ac transformer. Thomann sell one that is similar enough "the t.mix MIX 1202FX PSU", but the plug needs changing or wire it straight in.
i'm less worried why it failed and more worried why they shipped a brick and not a smps . i really think were at a time when a psu/charger should be an optional add on to a product for like $10 anyway. but then warranty wriggle out would be more common
My guess is that the mixer if full of op-amps that need split rail power - harder to do from a switch mode PSU than the classic centre-tapped transformer.
@@MartynDavies ? I would of thought it could done the same way just another secondary winding and a voltage regulator. As things are shipped by weight it would have been cheaper for them. There's no real r&d to offset. But who knows, they maybe got the heavy power supplies cheap as out of fashion inefficient chunks of metal that they are.
@@ralfstocker7742 lol come out of the 80s g'pa. I agree with what you mean, but given a choice between 50/60hz DC ripple and 15khz or so I know which is way easier to remove with a few inductors and caps, if your truly trying to shift it then you can also crowbar off a few mA with just a transistor or use an opamp, and even then you don't need to waste it you can use about 10ma and dump it into a power led.
@@MartynDavies Not only the requirement of a clean supply for the sensitive audio circuits, but that +-18.5v AC supply is also used to "creatively" produce the +48V Phantom Power for the Microphone inputs for their mixers which have been produced for many years.
By the look of it, this is the US version of their mixer power supply: 2 x 17.5V AC from 120V input. As far as I know, no-one else makes compatible power supplies. Your best bet is to try to find one on ebay, or perhaps other sites specialised to music/DJ equipment.
I haven't got it to hand, but I thought the centre pin was centre tap of the transformer, and the other two pins AC out. If you have a multimeter with an AC setting, you can easily check it.
I haven't got a tweakalizer, but looking at the manual, the connector looks just like the one Behringer use on their mixers. It may be the same power supply.
@@MartynDavies 120v I think it says it on the unit kinda looks the same cord you'd use on a computer or some subwoofer systems too. I'ma keep searching. I've had that thing since 2011 and lost the cord during a raid. RIGHT TO FREE PARTY
@@szymwad No, I'm still not getting it. But if you mean you want to combine two separate power supplies into one to drive the Behringer? The Behringer requires a centre-tapped AC power supply, so you can't just combine two 18V DC power supplies. Or probably not, anyway. Is that what you mean?
Thank you Martyn. Much appreciated. I owe you a beer, or something. :)
Hello .. I bought a behringer eurorack mx 802a on eBay without powersupply... Based on research the powersupply thst comes with it is 18v for 2 of the pins (xlr) at 800 mah.
However the powersupplies being sold on eBay for it is 17v for 2 pins at 600mah... Can those eBay power supplies work?
17V versus 18V should not make any difference, this will be about 11 to 12V after rectified to DC, more than enough to drive the op-amps inside.
@@MartynDavies thank you
Hi! Is that 3 pin connector power supply needed to get phantom power? I have Behringer Xenyx 502 but no power Adapter. Its very difficult to find 3 pin connector adapter for replacements. Can i just use 2 wires 18.0 volts from laptop charger to power up the mixer? i dont need Phantom power for mic. Thanks!
I haven't seen the internals of the mixer, so I don't know how it generates the phantom power. I imagined that the centre-tapped AC would make it easier to generate symmetrical +/- DC rails around GND, which are often needed to drive op-amp circuits. I think it's likely this unit has a whole bunch of op-amps inside it. You can get compatible power supplies on ebay for Behringer mixers, but they're often much more expensive than they should be for what is basically just a transformer.
it needs an ac to ac transformer. Thomann sell one that is similar enough "the t.mix MIX 1202FX PSU", but the plug needs changing or wire it straight in.
i'm less worried why it failed and more worried why they shipped a brick and not a smps
.
i really think were at a time when a psu/charger should be an optional add on to a product for like $10 anyway. but then warranty wriggle out would be more common
My guess is that the mixer if full of op-amps that need split rail power - harder to do from a switch mode PSU than the classic centre-tapped transformer.
@@MartynDavies ? I would of thought it could done the same way just another secondary winding and a voltage regulator. As things are shipped by weight it would have been cheaper for them. There's no real r&d to offset. But who knows, they maybe got the heavy power supplies cheap as out of fashion inefficient chunks of metal that they are.
@@ralfstocker7742 lol come out of the 80s g'pa. I agree with what you mean, but given a choice between 50/60hz DC ripple and 15khz or so I know which is way easier to remove with a few inductors and caps, if your truly trying to shift it then you can also crowbar off a few mA with just a transistor or use an opamp, and even then you don't need to waste it you can use about 10ma and dump it into a power led.
@@MartynDavies Not only the requirement of a clean supply for the sensitive audio circuits, but that +-18.5v AC supply is also used to "creatively" produce the +48V Phantom Power for the Microphone inputs for their mixers which have been produced for many years.
@@slm60uk Good point; my mixer does have the phantom power option;
Can you suggest a replacement adapter for the MXUL5 power adapter?
By the look of it, this is the US version of their mixer power supply: 2 x 17.5V AC from 120V input. As far as I know, no-one else makes compatible power supplies. Your best bet is to try to find one on ebay, or perhaps other sites specialised to music/DJ equipment.
what is the pinout on the mini din where is the common connector?
I haven't got it to hand, but I thought the centre pin was centre tap of the transformer, and the other two pins AC out. If you have a multimeter with an AC setting, you can easily check it.
well my transformer is dead and in the garbage thanks for your answer - i will try it@@MartynDavies
hello I need this power supply, I can't find it in my country, how can I get it thank you
Yes, these old-school transformers can be hard to find. They turn up occasionally on ebay.
@@MartynDavies Ok thank you
I'm trying to find a power cord for my tweakalizer and can't find one online
I haven't got a tweakalizer, but looking at the manual, the connector looks just like the one Behringer use on their mixers. It may be the same power supply.
@@MartynDavies 120v I think it says it on the unit kinda looks the same cord you'd use on a computer or some subwoofer systems too. I'ma keep searching. I've had that thing since 2011 and lost the cord during a raid. RIGHT TO FREE PARTY
Hi, if I buy a 18v 1-pin power supply and bridge the pins, will it then work
I'm not sure what you mean by 1-pin.
@@MartynDavies 1 pin 18v power supply bridge 2pin for this same volatage 1pin
I am buy power supply 1 output 18v 600ma
@@szymwad No, I'm still not getting it. But if you mean you want to combine two separate power supplies into one to drive the Behringer? The Behringer requires a centre-tapped AC power supply, so you can't just combine two 18V DC power supplies. Or probably not, anyway. Is that what you mean?
@@MartynDavies I did the plug and it works only the problem is with the phantom, but I don't need it