These suckers work. You hook them up between your amp and the speakers to multiply your speakers' impedance 2X, 3X, or 4X, letting your amp see an easier load from the speaker. To quote from the Speltz site, "For example: a 4 ohm speaker can be made to look like a 8, 12, or 16 ohm speaker."
These are the bird's eye maple with African ebony accents, with Cardas binding posts, in great shape. Will come with two pairs of 24" Anti-cables with spades, new and unused, so you can place the boxes close to your speakers, as recommended. Lots of good reviews out there.
$600 plus shipping and 3% for Paypal.