This tape headunit it about 5-6 years old from memory. It controls the matching Sony 10 stacker model CDX-65. If anyone has this headunit and its in perfect working conditon send me an email. Maybe you were thing about a CD upgrade? The 700 had an internal amp and the 800 didn't. I dont mind if you have lost the remote control. This is a long shot but you never know till you ask around. I'm after a good condition example and I'm prepared to pay the going second-hand tape player price.