[Pablo]

Hi, my cousin just sent me 2 Eleganza 1000 subwoofers http://mdesignlife.com/lit/MANUL_ELE_CC1000_A1ks.pdf

and connecting them to my receiver http://books.jvcservice.com/download/363087710/21347.pdf  

isn’t as easy as I thought it would be.  I am asking for some help.

I connected a shielded subwoofer cable to one of the subwoofer’s mono input from the ‘sub out’ on my receiver.  When I turned on the self powered sub it hummed real bad.  After playing with the gain and crossover switches, I blew a 250V fuse.  Same problem happened with the other sub but that fuse is still intact.  It’s still available for ‘experimentation’.  

Now, I know what you’re thinking – just ground loop or 60hz hum – but I don’t think that’s it.  Here’s why:

When the sub is turned on (either straight to AC outlet or to power strip) without any connection to the receiver there’s no hum – but there is when connected to the receiver.  The hum is noticeable when the volume on the receiver is at 0, but increases dramatically when turned up above that.  

I tried a different cable from receiver to sub, no luck.

I had everything plugged into a power strip/surge suppressor.  Then I plugged just the sub and receiver into a separate outlet.  Still no luck.

Receiver is a bit dated but worked fine with the old subwoofer I had hooked up.  

I’m totally stumped - this should have been real easy to set up!  I asked a local audio store about it who only recommended switching cables.  Desperate, I even tried asking at Best Buy and Circuit City.  

If anybody has any suggestions/insights, I’d really appreciate it!  

[MaxCast]

Do you have cable TV hooked up to the system as well?  If so, try disconnecting that too.
Why you would blow a fuse is a bit of a mystery to me.  I wouldn't expect that to happen.

[Pablo]

Maxcast, thanks for your reply.  

I do have cable.  After disconnecting the coaxial connection to the wall there was bass!  

I don't understand how cable could interfere like that.  Is there a filter I can get or something I can do to have cable TV and a subwoofer?  

Also, after turning up the sub's gain, I do notice a hum. I might try connecting its power cable with a 2 prong adapter to eliminate the ground.

Thanks again.  I would've never thought of that!

[John Casler]

Maxcast, thanks for your reply.  

I do have cable.  After disconnecting the coaxial connection to the wall there was bass!  

I don't understand how cable could interfere like that.  Is there a filter I can get or something I can do to have cable TV and a subwoofer?  

Also, after turning up the sub's gain, I do notice a hum. I might try connecting its power cable with a 2 prong adapter to eliminate the ground.

Thanks again.  I would've never thought of that!

There are and I'm sure many will be suggested, but, if you have a Power Conditioner like some of the Panamax, Monster, etc, sometimes they have a coax inputs and outputs that will also do the job.