EH Dr Q norm/bass switch

[peterg]

Can an SPDT switch be used in place of the DPDT norm/bass switch? I can't see that the switch is doing anything other than routing the input signal through either the norm or the bass circuit. Am I missing something?

[JebemMajke]

There would be a huge difference if you would use bass with normal setting. Sound would be weak and thin. It's a good investment to use dpdt there. Much more useful than to 25 k pot instead of a trimer. Because once you set it the way you like it you will not use it for some time.

[Mark Hammer]

Actually, the switch is making several connections at once, which an SPDT would not be able to do.  You need to use a DPDT.