I bought a used quad of these from a reputable AC member/manufacturer and unfortunately one of them isn't running at full power. In my modded Jolida amp the bias settings won't reach the recommended output. But all 4 still put out useful power and sound terrific.
Basically, I have 3 for sale that work fine, and one that is a serviceable backup. But no one wants 3. So I'm asking a pretty fair price for a used pair, and the buyer has some peace of mind if one craps out. Price includes shipping and paypal....$125 for all 4.