[RFI] Subwoofer RFI in stereo and computer speakers

[K6HCJ@aol.com]

Haaalppppp!!!  My neighbor 2 doors away (300 feet?) is  experiencing RFI in 
his stereo subwoofer and in his computer speakers.  2  separate issues.
 
I would like some ideas how to tackle the problem.  I've only worked  with 
him on the computer issue at this point.
 
1.  I've only been on 40 CW
2.  Problem begins at apx 100 W and really gets louder at 700 W.
3.  Tried Radio Shack 273-104 square toroids.  Seem to help at  100 W level.
4.  Can't seem to get any "real" help from Amidon on which toroid  mix to 
choose.  I need clamshell  type or toroids that clamp  around the wire rather 
than beads.
My station is grounded through an 8 foot ground rod.  I have a  Bencher LP 
filter and I don't get into my own computer or stereo system.   This leads me to 
believe my signal is being radiated.  
Whatever help the group can render is welcome.
Many thanx,
Marv Fagenson, K6HCJ