Jonboy84

Hi there I am running a studio master club 2000 old school mixing deck in to a Waudio Elite 1k8 amplifier running a pair of peavey pro 15 500w program 250w rms speakers 4ohm. I slide the master outputs to the unity level and usually keep the channel volume just underneath it's own unity level whalst running the amp gains around three quarters and no more. The issue I'd like to discuss is when I'm playing a venue (typical example, large working men's club concert room) typically 150 people or so, I like to push the channel volume up a little higher when the dance floor starts to fill. D

Hi there I am running a studio master club 2000 old school mixing deck in to a Waudio Elite 1k8 amplifier running a pair of peavey pro 15 500w program 250w rms speakers 4ohm. I slide the master outputs to the unity level and usually keep the channel volume just underneath it's own unity level whalst running the amp gains around three quarters and no more. The issue I'd like to discuss is when I'm playing a venue (typical example, large working men's club concert room) typically 150 people or so, I like to push the channel volume up a little higher when the dance floor starts to fill.

Good advice but sadly my father had already ordered the parts from eBay, haha. Although as it turns out fitting the new preamps has solved the problem and there is no longer any noise interference : ) so my thanks once again to Mccardle and superstardj for your advice and I'm pleased to have kept this old deck alive for a few more years : )

Sorry about the delayed reply. Yes it's quite likely that by not being careful enough with handling the delicate preamps when working on the master volume boards we inadvertently caused static damage. In answer to your question they do use through board soldering and seem to have 3 legs per side. I actually found someone selling them relatively cheaply on eBay, (around £4 for 3 of them) so I am going to give these a go and wear an anti static wrist band while working. As it's hard to envisage what else could have caused the terrible background noise... Naturally I will get back to you in the n

Thanks Maggie, have you used these yourself in karaoke sets? Do they give off much noise and can you operate on these frequencies without a license?

Hi Mccardle, I'm pleased to tell you that having looked more closely at the PCUs for both master volume channels, as well as wiggling the circuitry back and forth, I was able to make the fault occur at will rather than when it felt like it! Having discovered that the fault was being caused by bad joints around several components i have resoldered all components on both boards and the fault has not re occurred! Sadly upon reconnecting back to the amp and speakers (rather than in my dads workshop to a small hifi) there is a lot of background noise through the

The PSU is internal, located on the bottom right I believe. I will have a look at the diagrams also. When the fault occurs it can be randomly either the left or right speaker, but you can still faintly hear the sound through the affected speaker, it just drastically reduces output to an extremely low level and then all of a sudden will come back again.

Yes sadly it appears to do it on all channels, leading me to believe the fault has to be somewhere on the master volume. I am connecting via the 6.3mm jacks located on the top of the mixer, and ignoring channels 1 and 2 as these are labelled mic. We have stripped it down and wiggled various cables and connections around, none of which made the fault occur when I wanted it to, instead it continues to annoyingly do it when It feels like it. There is a ribbon cable running from all channels to the master volume, I'm not ruling out this as the culprit but its undisturbed so doubtful. I've tested a

I was just wandering if anybody could recommend a decent pair of wireless mic's for karaoke gigging? Obviously I'm wanting the sound to be as good as possible, but as I'm new to the scene I'm not looking to spend an absolute fortune either. A good "middle of the road" alternative would be good : ) thanks!

Hi guys, as it turns out it appears to be the studiomaster club 2000 mixing desk that is causing the unusual fading in and out of the speakers at random. Connecting a newer behringer mixer to the amp proved this. The problem with the amp overheating was solved by blasting years of nicotine and dust from it, so thanks go out to mc cardle for that tip : ) as for this problem with the mixer, we are still trying to get to the bottom of it unfortunately. So any advice on what to check would be great. Thanks again : )

Your a star, thanks for taking the time to go through all that. I'm taking it in to work tomorrow to blast it out and will change the fan and check out the circuitry later in the week and let you know when I get to the bottom of the problem! Thanks again, Jon

. Please let me know if these links are ok as I've not used that site before. Here's what the score is. The amp seems to operate ok even when the noisy fan kicks in, so I'm going to blow the dust out of it and replace the old fan with a new one. The problem still remains with the speakers, in that they are fading in and out randomly but never at the same time. Then all of a sudden come back again. If you could have a look at my set up in the pictures and let me know if anything is wrong that would be grea

I will be back home tomorrow so I will take a few pics and explain how I've wired it all up, maybe I've cocked up somewhere. I will try the upload sites but alternatively I could email them to you directly?

No sorry I was wrong about that, it didn't go in to protection mode the fan simply started spinning extremely quickly even though the load was very low on the amp, there also seems to be something rattling inside when this occurs. It could be the fan bearings are knackered or simply very noisy. Another thing to point out is that when you flick the switch on the back to stereo a red light appears on the front of the amp, but when switched to parallel or bridged it's an orange light. I'm presuming this is normal! The strange thing the speakers were doing could just be the way I've got it rigged

They are the quarter inch jack types to the speakers and the positive and negative are wrapped around the terminals of the amp as they don't have speakon connections on them. It's worth pointing out that the amp didn't shut off, it's just that after a few minutes of running fairly silently the fan at the back speeds up to a very high rate and makes a bit of a row. (This could be made worse by the fact I'm testing it in a small room!) and yes there is a slide switch with "stereo" "parallel" and "bridged" on it and is slid to stereo. I may be panicking over nothing and the fan speeding up may be