The centrepiece of my recording set up for many years has been an M-Audio ProjectMix I/O. The unit is a fantastic blend of a Mackie compatible control surface with automated faders and a Firewire audio interface.
Whilst the unit has been rock solid for many years, recently I began to experience problems with the device, especially when switching it on. The LCD display would be inactive, the input sensitivity lights would slowly flicker and eventually the device would power up. Then I began to get visual interference on my computer monitors which disappeared as soon as I switched the device off.#
I realised that when the device was powering on, the power supply light would flicker rapidly, until it powered up eventually. I searched the web for a replacement PSU, but couldn’t find an official spare and instead found quite a few frustrated customers also looking for a replacement.
Unfortunately, M-Audio were bought out by Avid and then sold on to someone else. Their website is still up and running, so I used their contact form to enquire about a replacement power supply. A week later the reply came, although it didn’t appear to be relevant to my question, as it constantly referred to a breakout cable rather than a PSU.
I then took another look around the web and came across a potential replacement at Maplin, in the “L11BQ Switched Mode AC to DC Adaptor for General Use”. A few hours later, and £25 lighter I now have a working replacement power supply for the M-Audio ProjectMix I/O. This adaptor runs up to 4.0A (4000mA), and the ProjectMix requires 3.5A (3500mA). My ProjectMix is now rock solid again and powers on immediately, with no unhappy side effects so far.
If you need one of these, there are a couple of things you need to know*. The unit needs to be set to 9V using the sliding control underneath the power supply. The correct connector tip in my set is the Red one and it needs to be aligned so that the centre of the connector is positive, so you need to make sure that when you connect it, the ‘+’ symbol on the tip is aligned with the word ‘tip’ on the cable connector. As this power supply is for the UK it is supplied with a 3 pin plug. The input voltage states 100-240V, so I assume that with the correct plug it would work in the USA, but check with an electrician first!
* Legal note – I’m not a qualified electrician. This product has worked for me, but if you’re unsure please be sure to consult a qualified electrician before plugging this power supply into your ProjectMix! I can’t be held responsible for any damage caused by using this power supply!