I have two HX 300-12OB amps that I used to drive a couple of 8 inch servo H-Frames for about 5 months. They look like new, but I'll provide pictures when I get home today. The amps are technically for the 12 inch servo subs but I used them with the 8 inch servos without issues.
I finished a Super V kit so I no longer need these. Buyer covers shipping, I'll eat the Paypal fees.