Axiom Home Page Forums General Discussion Home Theater OMG! NO!!!

I finally got my subwoofer cable here and tried it out, the sub woofer was working great. I noticed some interference in my 32" tube tv so I moved my subwoofer out some and then went off to eat dinner. I came back and was organizing some cables from all my other devices. I turned on the subwoofer and all of the sudden its nothing but this deep low loud hum. I tried moving it and the cables in different places and it doesn't change. I tried out a CD and the hum stays and does nothing with anything...just a low hum that coincides with nothing. What is going on?!

The loud hum occurs whenever both the amp and sub are pluged in and connected by the Sub cable. If the amp isn't plugged in, it only hums when the cable touches where it plugs in. I don't know what to do. Should I send it back and get a new sub if this one is broken?

I'd call tech support on that one. Sounds like there's a short somewheres.

I followed all the instructions in the manuel that came with it..

Have you tried a different cable?

No, I only have 1 subwoofer cable. this one

Do you have another RCA-RCA cable? I know you bought a bunch...

rca-rca cable, like just a red and white audio cable? I have some of those yeah. Why?

When you moved the sub did you use a different electric outlet ?

Guess what... a subwoofer cable is nothing but a label. If the cable has an rca connector on each end, you can use that. Try one of those. (same deal with component video cables, composite video cables, digital coax cables, stereo audio cables, mono audio cables, etc.--all right, the video ones might need to be to a higher spec).

I did not change electric outlet, in fact I moved it back to where it was anyway.

Just tried one, same hum problem.

Try disconnecting your cable ( or sat ) connection and see if the hum goes away.

I've tried every combination of things unplugged and plugged. Amp Power cord + Amp Sub cord + Sub Power cord + Sub Cord to amp = Hum
If none of those are plugged in (or the rocker switch is off), it doens't hum, but then nothing would work.

Have you tried running the sub directly to your reciever?
Assuming you have a receiver with preamp outputs.
Sorry if I am being presumptous...just trying to help.

It happened to me once and I had eventually realized that the preout on my receiver was bad.... Also try to bypass the xover on the sub and lower the volume to minimum...see what works at this point.

Ok, I was messing around with my Amp, the only time the hum didn't hum was if the Sub Out was the only thing plugged in. If the S-Video or Coaxle digital was plugged in along with the Sub Out, it would hum. Both S-Video and digi coax have to be gone, which is pointless because I need them.

You could also try the speaker level connections?

I was messing with every single cable. I relized that both the S-Video was in the TV which touches the DVD player and the Digi Coaxle was in the DVD player. I found out that whenever I unpluged the regular coaxle cable (for cable TV) the humming stopped. I had plugged in the TV cable connection in between when I was using the sub, so why did this happen? How can a coaxle cable cause this?

It very well could have been that the connection before was not as good as what you have now thus breaking the ground from the cable connection.What you have there is a ground loop problem.

Does your sub have a ground loop screw at the back. If so, try unscrewing it to see if the noise can be lifted there, assuming it's a ground loop issue. If that does not work and you think it is a ground loop, go to www.jensentransformers.com. I purchased their sub filter and it works great. Pricey but there products are top grade.

No ground loop screw, oh and no matter where i put my sub it puts insane static on the screen. I think I'm regretting ever buying all this stuff.

It will all be OK.
Just give Axiom a call, and I'm sure they will help you out.
No worrys.

Except the sub is a Hsu, innit?

No, its an EP350

OK, give Axiom a call. They're very helpful.

Since the sub is not shielded, there may not be much you can do regarding the tv distortion except moving the sub far enough away or purchasing a new tv (lcd, dlp, plasma).

As for the hum, the great folks at Axiom can offer some suggestions. Also, look into the isolators for either the sub or cable. I tried the one for the cable. It helped but the one for the sub eliminated it completely. It's either or as you cannot use both to isolate the hum.

Keep us informed!

I like the way you think. I'm for the new TV.

Thanks. I try to be suttle!

Unfortunately, I'm not as suBtle.

So can I keep using this sub and it won't damage the current TV? I don't have money right now for an expensive TV, but sometimes the intereference isn't bad but it IS always there.

Call





Axiom.

take deep breaths man... try and slow down.

trust me, we ALL feel your pain. nothing stinks more than getting everything set-up, and then it not work right.

if it is a prob with the sub, and it very well could be, i can give you extremely positive assurance that axiom will do everything to fix it and FAST.. their customer support is flawless..

give them the chance to make it right.

breath..

bigjohn

Any word yet?

Well I called Friday and he gave me an email address to send my shipping address to. I did that. No confirmation email or any word so I'm guessing they are sending the new subwoofer. The email was jv@axiomaudio.com

Great, they sent me a circuit board for the EP350 that doesn't fit..

What sub do you have?

Listen, if the hum is still there and you think the cable tv is part of the problem, I can send you my cable isolator from Jensen. I'm not using it so just let me know.

Oops. Let me find it first.

Found it! Just let me know how it goes with the replacement board.