yamaha mvs-1 master volume contoller/selector

bluecomet
bluecomet Posts: 1,118
edited May 2009 in Electronics
Does anyone know of this unit and what exactly it does. I can't seem to find much information on this piece. Is it rare. Thanks.
Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers,
Yamaha RX-V2500 System, Carver A753 3 channel amp.

Polk HT system 2: , SRT system with f/x 1,000's rear speakers on 7.1 system currently using Onkyo TX-RZ820 receiver, powered by Sunfire Grand Theater amp

Polk Speaker collection: SDA SRS 1.2tl x 2, SRT system, SDA SRS 2 P/B, SDA 2A, SDA 1C Studio, SDA CRS+, Monitor 7B & 4, SRS 3.1tl, RTA 15tl, LS90, LSI 9