ebtech ..how to

[kedmison]

billyo,

I too use mackie. CFX12 mixer, 450's and 1501 sub. What you are describing may be a ground loop problem coming off the computer. When I first started using Hoster over three yaers ago I encounterd an awful hum. I thought it was the board, the speaker. I didn't know. What it ended up being is I had to use a three to two ground plug on my computer cord. Try that and see if it helps.

Kelly

[billyo]

kedmison, thanks for the reply.. the problem is i have everything t/off except the board and the mackie speaker..im still getting hums, i will sure try to use the adapter 3 to 2 prongs.thanks..

[kedmison]

Not sure what your referring to as "ebtech." What is ebtech?

Kelly

[billyo]

ebtech is the name of a company that makes hum elliminators and other products..

[mindonstrike]

Hum eliminators only work when placed between the offending pieces of equipment. And since powered speakers tend to be plugged in on other outlets/circuit breakers and or 120v legs than your board and other equipment is, my money would be on a problem between a speaker(s) and board. Flourescent lights and light dimmers and fan speed controls being on the same circuits can cause problems as well.
You can read more about it here http://www.epanorama.net/documents/g...pa_advice.html

I'm not trying to lecture here but in the interest of having all the facts:
Just something to ponder when liberaly using 2 prong adaptors. Without the adaptor if a piece of equipment develops a ground fault it will trip the circuit breaker. With the adaptor anything metal connected to it becomes energized and just sits there waiting for a path to ground to come along. That path may be you or one of your singers.
Worst case scenario: Some old guy with a weak heart or a pacemaker get's a nasty shock and dies, you are now guilty of negligent homicide because you defeated the safety features that would have protected him.
Ultimately it's to each his own.

Sam

[billyo]

hey guys..dont know what else to do here..bought the hum elliminator connected from my speakers to my board, bought (3) 3 to 2 prong adapters, bought the radio schack ground loop isolator which is connected to my extigy sound card, im not getting anymore hums now..im getting a low hizzzz now..from my speakers..is this normal..like i said i am using a mackie sr450 powered speakers and a dfx mackie board..the hizz doesnt get any louder even with the volume up..

[Beavis]

i never run my computer volume past 50% or half way up the slider.

if you have it full tilt, you will get noise.