In my humble (?) opinion, no.

I've written in this and other forums that I think this approach

a) is dangerous;

b) probably won't work.

Danger: A home stereo rated at 100W per channel into a standard 8 ohm speaker can produce 28 volts RMS, or 40 volts peak. A typical Clark-type Zapper is powered by 9 volts, and has an internal power limiter that reduces the voltage at the contacts to around 5 to 6 volts peak. More important is the available current. While it would be hard to be electrocuted by a home stereo, you can get a noticeable shock, never a good thing. Also, if making contact with both hands, the current path is across the heart. Yes, that is as bad as it sounds, particularly when the available current is over 500 times that of a Clark-type zapper. I don't know that they have ever had any problems in this area. But there are reasons why UL has such stringent rules for patient-contact electronic equipment, and your home stereo does not come close to the levels of protection required.

Workie: I see two problems with their approach. I've written to those guys about the quality of their techie-talk on their website. Their techno-babble is short on tech and almost pure babble. If their explanation botches the high-school level science, how good can their products really be? Beyond that, my guess is that fewer than 1% of the home stereos in this country have the guts to accurately produce what their software generates. The percentage is even lower for sound cards. Bandwidth, AC coupling, babble babble.

Credentials: I have never seen or used any of their products. But I know how sound cards, stereo amplifiers, and zappers function, and I know what the "Rife frequencies" are. In my **opinion**, they do not add up.

ak