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Tópico: static from my rmx when plugged into my amp

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hi i run a pereaux 600 amp older model not sure of mod# but when i plug my rmx into it there is a staic noise, i can play songs but you can hear the noise in the softer bits, i have 4 etone 200w speakers, i ran the rmx through a zpe 1000w amp wif the 4 etones and 2 aus moniter 800 subs, it sounded great seemed a bit quite but great, the only difference is i ran it through a mixer, is it advisable to run these rmx's through a mixer then the amp? p.s i run it into the home stero amp no probs...
 
Mensajes Mon 04 Oct 10 @ 6:22 am
The RMX doesn't have balanced outputs, so you will want to keep its output cable as short as possible and keep it from going near any power wiring or especially power transformers.
If your cable going from the RMX to your amp is more than a few feet, I would expect that you would definitely get some noise, especially if there is a computer nearby, which there is.

I can't find any documentation on that particular amp, but if it is pro equipment, then it will have either XLR or TRS balanced inputs. Balanced connections reject the noise. Be aware that connecting unbalanced (i.e. RCA) connections to a balanced connections (through use of simple adapters) will get your sound from point A to point B, but will not give you any of the noise canceling benefits of balanced connections. To convert unbalanced signals to balanced requires a transformer; any decent mixer has this built-in and can accept RCA ins and provide balance (XLR or TRS) outs. When I used an RMX I would have a short run from its output to a mixer, being sure the RCA cable didn't cross or come too near any AC power cables or even USB cables, and also as far as possible from the laptop, and especially its power supply, and then the mixer had balanced outs to the amp or powered speakers. You could also try a pair of DI boxes if you really don't want to use, or don't have room for a mixer.

Hope that helps!
-Frd
 
cheers frd i really appreciate your reply :-) i have a mixer coming tomorrow to try, ill be sure to watch that lead run, it is short but im sure it was running over all the other cables etc, i'm sure we are using unbalanced into the amp and ill have to look further into our options there ill keep you informed how i go cheers mate ;-))
 
Generally speaking it's NEVER advised to run a MIDI mixer or a soundcard directly on an amplifier. You should always use some hardware in between that can attenuate the volume signal...
 
hey Phantom DeeJay, i thought that my self but i tried any way for some reason ;-p and Frd i got that old mixer today and ran it through that it was better but still had alot of static, went to store and got new leads etc no change, in the end i finally figuared it was having the charger plugged in the same circuit as the amp all seems good now yay
 
Then you need a "ground loop isolator" for your RCA cables! :)
 
Dee Jay tj1 wrote :
... in the end i finally figuared it was having the charger plugged in the same circuit as the amp all seems good now


Glad to hear you got rid of the hum! In situations where you need to use the same circuit, you could also try a 'ground lifter' on the charger; that is really just 3-pin-to-2-pin power plug that keeps the ground wire of the device from connecting to the power circuit. Of course having no ground can preset safety issues, but as long as your not playing in a puddle of water, you should be OK ;)
 
cheers Frd i was thinking the same thing my self, although the trans on the power supply may be earthed the lap top is not (i'm pretty sure anyway) so the earth is really only for the trans and it looks double insulated anyway cheers for your input guys many thanks
 
p.s no earth on charger = no static at all.... love it
 


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