Karaoke Forums

Hi all,

I was reading the post that Babs started about the same mixer and was wondering if Lonman or anyone had a suggestion for this issue.

I plan on using my Mackie 808m for karaoke as well as for my smaller band shows where we don't need our soundman.

The problem is that when I really belt out through the mic, the sound gets all kinds of distorted and fuzzy. At first I thought it was my gain on my wireless, so I hooked up a corded SM58 and it still happened.

I thought maybe my gain was too high so I turned that down - everything seems to be ok. I have the main volume all the way up and the channel volume about 2/3rds of the way up - all is well until there's a real forceful note - it just drops into distortion. I use the mic as volume control in terms of backing off a bit on the power notes, it isn't that.

I have it set up just for mains with left and right going into their appropriate cabs (2 15's a side, daisy chained). It's a 1200 watt amp, so I don't see a prob with that either (This has even happened hooking it up to just two PR15's).

I called Mackey and they said it was an issue with the channel setup, but I've tried about every combo imaginable with the same result.

If anyone has any advice I would really appreciate it!

Thank you!

Yeah, save money, and buy Behringer.  Yet another unhappy mackie person.

Is it just the one channel it happens in,  or in all the channels?

Are you speakers properly matched to your amp?

You said you have the main voulume ALL THE WAY UP????  Explain please

Is you channel clippin what you belt out that note?

To me it sound like you are overloading, and may have some gains set too high.  But just a guess.  I am sure others will have some more insight.

Most likely not the problem.



Why do you have the main volume all the way up?  Sounds like a bad gain structure on the channel strip.  With the volume channel down & main volume down, no effects & eq set straight up, turn up the input level set until it JUST starts blinking at your highest vocal level, if it runs the light steady, it's too high & back it down.  Now turn the channel volume to unity - straight up.  Now turn the master volume up until you get the desired volume - repeat with the rest of the channels.  Once you get a baseline set, your channel adjustments will be done on each channel individually.



Shouldn't be an issue.



I agree.

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Great advice -  :no:  :roll:

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Thanks guys -

Twansenne - It happens to all of the channels. The speakers seem to be matched fine - I'm sure 600w a side could push two daisy chained 15's.

I have the Master turned all the way up because I followed pretty much the same advice that Lonman had given me. I set my gain to blip on those notes and turned up my channel volume to unity. Then I had to keep turning up the main to get the desired volume. When I didn't arrive at the desired volume, I had to turn my channel volume up a little more.

Maybe that's it right there... I just don't have enough power and I'm overloading the thing - which is sad because 1200 watts should be more than enough to rip your face off in a small-med wooden bar.

Thanks again for your advice, I'll take it in to get looked at by the local sound guru. If that doesn't work, I'll just have to use it as a board through a bigger power amp.

I think I missed something in the translation.     Sounds like way too much master volume.    :yes:    Is that smoke I smell?

Bigger power amp isn't going to make it louder, unless you get a substantially larger amp - you would need double the watts just to get a 3 db increase.  You may be better off adding a couple more speakers.  This will give you a 3 db increase in volume without having to get the bigger amp - provided you really need it that loud.



Remember that rating of 1200 watts (600 watts main/600 watts monitor) is into 2 ohms.  300 watts main/300 watts monitor into 8 ohms.  Which means if you are hooking 1 speaker into each amp channel, the speakers are only getting the 8 ohm load = 300 watts per.

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