Nice tweak. Basically you attach these between your + and - speaker connections and it acts as a Zobel network. In terms of how they sound, they clean up a lot of signal artifacts and provide a sound that is cleaner than what is without them. They were an Absolute Sound magazine recommended component a few years back. More can be learned about them at the Walker Audio site. The retail was around $300. I will sell these for $150. I would keep them except my Class D amps won't work with them. Paypal preferred.
