I've used the Sn@p kits with mostly success. Some issues I have ran into have been....

1) at low volumes sub turns on and off & you hear the "thump".
2) I've had some sort of static when the whole system is off to.

Sn@p is really good with tech support and usually can find a solution or will send you a replacement if necessary.



As far as a sub Balun kit....I've never tried it before but couldn't you use a composite Balun and just use one of the channels? Not sure though.