I'm looking for a simple Bryston preamp to drive my ICE amps wich have an 8k ohm input impedence. Ther are a few .5b's for sale but I can't find any specs on them. I need at least 4v or more output from a preamp. I can't seem to find any specs on the .5b or any other older bryston preamp. Do they all use the legendary Bryston discrete componet opamps? If you guys have any info or a Bryaton preamp for sale, I'd appreciate it - Thanks