In exchange for receiving only a mild level of abuse from him during my childhood, I agreed I would post this for my dad ... The sensor inside his $2,000+ stereo receiver/amp that accepts the remote's signal has died. He is looking for a passive preamp to hook up to his existing receiver/amp so he can control the volume using a remote. He is looking for something that is not expensive, but also something that will not noticeably 'color' his very nice system. Any input or ideas would be appreciated, especially if you believe this is something that doesn't make sense or will work. My dad says: Any thought??