Dawgfish loaned indefinitely a anthem amp2 that has a low level hum, help me

scottyboy76

As usual. the bear of cp was loaded with gear when he came by to help me set up my pristine sda 1cs.

Ics, Tubes, as well as the anthem amp2, to match with my sonic frontiers sfl1 pre.

The only problem, small as it is, is a hum, hardly noticeable when no music is playing,

I have switched tubes to a gold prong, russian made he loaned me, no avail.

It is only noticeable during quiet, or silent pasages. but it is starting to get to me.

Have tried many ics, none to any available.

Any advice would be appreciated.

I have a carver tfm 25, which has no hum, but I dont believe has the balls this amp does, might be wrong.

Thanks again

scott and deb

Conradicles

Also email Chris @ Parts ConneXion if the cheater plug does not work. He may have an idea.

voltz

I had luck with a "Ebtech Hum X Voltage Hum Filter" I got from amazon but its like $50, but it solved a problem I had. So I'd try the others 1st.

tonyb

Is the hum coming from the speakers or the amp itself...with nothing connected to it ?

scottyboy76

I think i have a cheater plug here somewhere, if im correct, it just allows you to plug a three prong plug in one end, and the other side has only the two blades, no round ground prong, right?

the hum is coming from the speakers, not the amp or any other units.

If the cheater does not work, will look into the other hum filter, thanks all.

if all else fails, will have to unpile everything and put the carver back.

BTW, any opinions on the quality, worthiness between the tfm25 and the anthem, kinda think i know the answer, but what the heck.

scottyboy76

Cheater plug no workee, will be contacting the others you guys have directed me to.

scottyboy76

Ok I just swapped the anthem out and the carver tfm 25 in.

Sounds very different, dont want to say better, because that anthem has some real heft, but the carver is silent when it needs to be, and when cranked, more than holds its own.

Still interested in what is causing the hum in the anthem.

Let me tell you this, the anthem is one heavy ****,and not just compared to the carver, to me its a testament to bob carver that he could make an amp without the heft, and heat that still sounds so good.

deafbykhorns

What is your preamp?

scottyboy76

My pre is a sonic frontiers sfl1

deafbykhorns

Well, so much for my theory (impedance), that should be a good match with that amp.

drumminman

Scotty, I had the same issue and this worked a treat for me. Take a piece of wire and connect the chassis of the pre to the chassis of the power amp. You can also connect the CDP if the hum is still present, though connecting just the two completely eliminated the hum for me. You can do it externally using the case screws as long as they're not painted or power coated.

Differing ground potentials can cause this.

Lifting the ground on the amp should only be a temporary solution as it's there for safety.

scottyboy76

Thanks drum, I have put the carver in place, but i will keep that info filed away.