Alesis Multimix 16 firewire Power supply problem Help please

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Member Since: Dec 29, 2006

We purchased this mixer in November 2006. Since then we have only had it working for a week. We had a problem with the power supply- it died.
We were sent a new mixer. After two days, the power supply died. We contact Alesis UK, and they sent another power supply out. One day later, yes you guessed right, the power supply died. We had another one sent to us, and this time my collegue took the mixer home to try it. again, after a day it dies again.
Can anyone help us on this.
It is a good desk for the price, we have limited funds, and so we would like to get this to work. We have used it connected to the G5 Mac, and an IMac intel core duo.
I'm not sure what else to do.

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Czar of Midi
Since: Apr 04, 2002

Dec 30, 2006 12:47 am

I would make absolutely certain the power supply is set for correct voltage. It sounds as though there may be a problem with the voltage it is getting.

I would also check with Alesis and see if they can diagnose the cause of the power supply failure. I know that isn't much help, but there must be something causing it if it is happening multiple times like that. I can't believe they could have that many bad power supplies and you got them all in a row like that.

Since: Jan 22, 2007

Jan 22, 2007 11:55 am

Ive also reciently purchased the multimix fire wire 16 and experienced similar problems with it. If you look on the back panel were you plug the PWR SPLY into the board. There is a recomendation that you need to use a 18v 1000 miliamp power supply. I was given a 18v 500 mili amp supply 2 times and blew them both. I don't think the board is damaged because it works fine until the power supply blows. The power supply got real hot. I noticed the last time and I let Guitar Center Know that they gave me the wrong power supply for that board and they said they would order me the 18v 1000 miliamp supply required buy the manufacture. Is your power Supply 500 or 1000 mili amps. Please respond I hope this helps.


Czar of Midi
Since: Apr 04, 2002

Jan 23, 2007 09:53 pm

Nice call and welcome to HRC Tim. Had not even thought of that one. I hope Milo sees this and gets it fixed. But that does indeed sound like the cause of the problem for sure.

Since: Jan 22, 2007

Jan 27, 2007 10:10 am

Thanks, Many times when we get something new we blame malfunctions on ourselves. Ive learned that when buying anything anymore. especially from larger retailers they usually know less than you do. Yes, Id like to see milo respond just to see the forum go full circle. i don't usually reply to forums such as this.


Since: Feb 04, 2007

Feb 05, 2007 06:52 pm

I have just had my power supply for the same mixer blow on me. It's the 1000mA version and was getting very hot (almost hurt to touch the top or bottom).
Depending what alesis say when I report this, I may just build my own that I know isn't going to break for no reason. Obviously the mixer was drawing more current than the transformer could supply, so maybe I'll just build a 2000mA transformer =)

I have another problem with my mixer when using cubase, that I'll explain as another post.


Since: Jan 30, 2007

Feb 08, 2007 08:55 pm

I had the same problem my friends and having just read your post I checked the bad power supply and it is the 1000mA version. I am actually looking at it now. I have had 3 weeks of trouble from my 16 firewire and dont know wat to do next. Suffice to say the new power they sent me has not blown yet.

Since: Feb 11, 2007

Feb 11, 2007 12:57 am


Sorry I cannot help out as such, other than to let you know that I have had a similar experience with the Alesis Multimix 16 Firewire. Three AC adaptors have suffered total failure from two brand new mixers.

I've contacted Alesis and await a response.

Since: Oct 15, 2009

Oct 15, 2009 06:00 am

I too have just experianced the dreaded PSU blow out on my multimix16 (firewire).
I bought the mixer about 8 months ago and the guy who sold it me told me that this was the mixers 3rd PSU!
I have used it now and again mainly running synths through it at line level and had no problems however the other day I found a mic so I decided to test it using the multimix, the mic worked fine but It needed the phantom power enabled which is an additional 48 Volts, in literally a few hours the mixer no longer worked!!!, I could tell this by walking in the room as the PSU makes a slight hum when turned on and I noticed the room was completly silent and no power to the desk.
I'm just wondering if the people who have had issues with this desk are using the phantom power to run mics on, this additional power needed may be the cause of the PSU blowing, I know it should not matter and yes Alesis should have built and sold a suitable PSU for this mixer from day 1, but it may solve a lot of head aches for a lot of multimix owners, It would be good to hear other people's thoughts on this?

Since: Oct 23, 2009

Oct 23, 2009 06:26 pm

I've got a mulitmix USB 12, which i've had for about 2 years. One PSU failed earlier this year, I bought a cheap usb mulitmix 6 on ebay and have been using that power supply since. (its 18V/550mA version)
Unfortunately, that second one has just blown aswell!! I've found DV247 sell a similar one (18.5V/700mA) for about 35 inc delivery,
In all honest, the mixer works reasonably well, and I do use it pretty much every day. If anyone knows where i can get a cheap or alternative PSU, I'd be very grateful. If I can't find a cheaper solution, I may have to say goodbye to them.

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