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PLEASE HELP ME. NEED ADVICE

Hi,
I am selling my existing system, or parts, to downsize and also I want something very "quiet". My existing system always had a slight buzz or hum when the amp was turned on. it's a conrad johnson mf2500a ss amp and a cj 18ls pre.
My old integrated krell kav300i did the same thing. It is so annoying. Why is this? Every place I've lived it's done this, and this time I used a monster hps7000 power conditioner. Do I have to live with this or is there something that is dead quiet when turned on? Looking at a musical fidelity integrated 3.5? Please help me.
jdnamn97
jallen
502 posts
 
The ground loop theory is your best lead to follow. All of your components should ground at one location in the wall, and only one component with a ground plug, float everything else with a cheater plug. Be sure your AC receptacle has good spring tension. Many times the tension is so bad that the plug nearly falls off the wall....now that is a fire hazard. Get a Hubbell or hosp. grade AC outlet and this is contact. Jallen
swampwalker's avatar
swampwalker
5,132 posts
 
A cheater plug is accepts a 3 prong (w ground pin) but has only 2 prongs out.
jea48
2,944 posts
 
01-28-09: Jdnamn97
Thanks guys for your input.
By the way, what is a cheater plug? What does it look like?


Example

If you use this type of adapter make sure you insulate the ground strap of the adapter from touching the receptacle cover plate holding trim screw. (The trim screw is bonded to the equipment ground strap of the receptacle.)

Safety note:
The adapter is not UL approved to be used as a ground cheater.
czbbcl's avatar
czbbcl
1,699 posts
 
Is the hum coming out of the speakers while the system is turned on or is it coming form the amp when it is turned on? The cj mf series does have a slight transformer hum when turned on. I owned one and it was never bothersome..........couldn't hear it from my listening chair. If the hum is coming from your speakers while the system is powered up then try lifting the ground with a cheater plug as suggested above.
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