Mixer hum?

**jokerone** · 02-13-2013

I have an Alesis mixer I've owned for about 4 years.

The past couple of days, I've when I power it on from a cold start I get hum that lasts about a minute then slowly goes away. after 3 mintues you can't hear it anymore. I listened from the headphones so I know the problem isn't in the monitors.

Any ideas?

thanks.

**jokerone** · 02-17-2013

I've isolated the hum, and its constant, not just at startup and VERY loud.

It is coming from the mixer. I've disconnected everything but the power supply and headphones.

Could it be a bad power supply or the mixer went bad?

thanks

**Lt. Bob** · 02-17-2013

Originally Posted by jokerone

I've isolated the hum, and its constant, not just at startup and VERY loud.

It is coming from the mixer. I've disconnected everything but the power supply and headphones.

Could it be a bad power supply or the mixer went bad?

thanks

could be either .... what kind of power supply is it?
Is it something that you may have another of?

**jokerone** · 02-17-2013

Originally Posted by Lt. Bob

could be either .... what kind of power supply is it?
Is it something that you may have another of?

Hi, no its some goofy one that alesis makes. I looked it up its $26 from BH.

However, I may have found the problem. Everybody seems to have problems with their capacitors. youtube videos show how to fix them, and I found this link too.

Multimix hum issue. - Gearslutz.com

**Bobbsy** · 02-17-2013

It's not just Multimix, though 4 years seems awfully young for problems to start.

The sort of hum you describe is a symptom of the electrolytic capacitors in the power supply drying up. As noted above, you can buy a replacement fairly cheaply or replace the caps yourself--but all too often this is just a first problem and other things will start to crop up.

**jokerone** · 02-18-2013

Originally Posted by Bobbsy

It's not just Multimix, though 4 years seems awfully young for problems to start.

The sort of hum you describe is a symptom of the electrolytic capacitors in the power supply drying up. As noted above, you can buy a replacement fairly cheaply or replace the caps yourself--but all too often this is just a first problem and other things will start to crop up.

I have had nothing but problems with this Alesis mixer. In their defense I bought it used, but the first problem was drivers. They have a greek company write their drivers for them, and the audio going down the USB pipe ended up getting pops, crackles, snaps (rice crispees) after about 2 minutes of use. you power cycle the mixer and the problem went away for another 2 minutes then would slowly return after about 30 seconds it will be unuseable.

now the hum issue. My next Mixer will be an Allan & Heath. I've only heard good things about them.

Actually I don't need many channels, I just need it in a rack out of the way.