ebtech ..how to

[billyo]

can someone help me how to hooked this up..i have this connected from output of my soundcard to the ebtech input, ebtech output to the input of my mackie board, im still getting hum from my speakers ( mackie 450 active speakers ) had all the volumes down, still getting hum..turned up the mic volume hum got louder....need help..

[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.

[mhollyts]

Based on equipment you can run your PC at full tilt... without noise. I do it all the time. If you have good equipment with all updates you should not have a problem. There are cheap sound cards that will cause buzz/hiss/noise but good cards in the PC/laptop should be true to the sound and not add anything.

[zzeliminator]

Hello. I used a Mackie 808S powered mixer with my Mackie SRM-450's. No, I don't connect the 450's to the powered speakers outputs. I connect to the "Mixer outputs" on the front of the 808S like Mackie said to do on the phone.

In my regular gig, I use the 808S and 450s with only getting a minor amp "amplifier noise" noise. I was told in this normal in powered speakers.

I played in another building this weekend. The wall outlets were so weared out that just the weight of the cord was pulling out the end of the cord. And there were three light dimmers for the stage lighting. Speaker hum, Oh yeah!

I ran a extension cord to some other outlets to try to get onto another circuit, but all the wall outlets were on the same circuit.

I don't think the 450s like to run without the ground prong.

I would do this: Plug up the electrical cord to one 450 and turn it on (no audio cable connected). Do you have hum, if so, note how much. Try to clean up the hum there.
If not hum, continue to connect up your system, one cable at a time, turning on the power each time you add. You should find out where the problems is.

[billyo]

mhollyts,

i dont think i have a cheap equipments. i have 2 mackie 450 active speakers, $599.00 ea. mackie cfx 12 and a dfx.. creative extigy sound card ,716uf plextor dr. and a 200 gig maxtor ext. hardrive..(4 )$39.00ea. xlr cables for the speakers and mics..and a bunch of other stuff..

[Beavis]

did you try lowering the master volume on the computer ???

make sure the wave volume is all the way up.

[mhollyts]

billyo,

I did not think you had bad equipment.

I just disagreed with the comment "if you have it full tilt, you will get noise" comment. Which I think was a mistake. There are so many causes for noise that it can be hard to figure out. I think zzeliminator states it well with the steps to take to figure it out.

Just start with a know piece of equipment at a known location that does not have noise. Plug everything in one at a time until you can figure it out.

Sorry for the misunderstanding.

Mike.

[bobcox- with the Lord]

I Just Put Toghter a new system and it has a slight galloping sound i think is hard drive, also when i move the pointer across screen i get a buzz any ideas on this. i tried 3 prong to 2 prong on computer and on whole syst still get it.Bob

[Corbin]

Sorry to say, but it sounds like a cheap sound card...
Is this a laptop your running?

[mindonstrike]

Originally Posted by billyo

can someone help me how to hooked this up..i have this connected from output of my soundcard to the ebtech input, ebtech output to the input of my mackie board, im still getting hum from my speakers ( mackie 450 active speakers ) had all the volumes down, still getting hum..turned up the mic volume hum got louder....need help..

What happens when you unplug the mic and turn that channel fader up?
If the hum at least does not get louder you have a bad cable, a bad mic or possibly a mismatched impedance for that portion of the problem.

BTW does the hum go away when the computer is disconnected?

[bobcox- with the Lord]

Sound blaster audi z in a compaq evo 2.6 gigh 768 meg ram xp pro. Bob

[MTUSUPPORT]

Bob,
Normally the 3 prong to 2 will take out any noise, as I get the same on my Laptop, this is the only way for me to kill all of the noise.

I have tried the more expensive noise Remover plug, that is about $70+ and it did not work for my system at all, It made no difference.

[billyo]

hey guys, i already have all kinds of adapters , hum ellliminators, noise suppressors, and i just bought from radio schack a noise elliminators, it supposed to reduced or elliminate any kind of noise coming from any elect. outlets..it reduces the noise a lot.you now have to actually stick your ears near the speakers to hear the hizz/buzz even if i had the gain up.on my mics, and channel inputs for my sound card. and master vol.and of course im only using the sr450,sim not sure how will it sound if we have to use the bigger mackie speakers.. not sure which one of the gadgets really works tho..

[zzeliminator]

Morning. What is the name and part number of this device, and how much is it? Are you saying that you are pluging the power cord into this device, then the device into a wall outlet? Thanks.