S150 THX Tripole Surround Speakers | The Tripole is a new concept in surround channel speaker design, offering the performance aspects of two different types of speakers. Think of it as a...
M&K Miller & Kreisel Surt 25 Tripole Surround Speakers New open box Rare USA | eBay
M&K S95T Black Tri-Pole Surround Speaker (Pair) at AV.com