[Amps] Vacuum relays in Dentron MLA-2500

[R.Measures]

>Wondering if maybe someone that has access to the schematic for the 
>MLA-2500 could take a look at it and let me know what I would need to 
>change this amp to use vacuum relays. I've been told that I would need two 
>relays but really don't know for sure. I've found several vacuum relays on 
>ebay but need to be sure of what I need to get. One or two? Voltage? ect.  
>I can't deal with the relay noise in this amp any longer. Please help!
>
**  Don -- see Figure 7 on my Web site.  Two spdt relays are needed for 
high-speed switching because there is currently no dpdt relay that is 
quick enough.