[lyramax]

Can the 323 effective drive the 507, or one would need to step up to the 006?
 
Also:
 
- What is the difference between the 323 II and the newer 323 S?
 
- Does the 600LE provide a better value for the money than the 006tS for the additional cost?
 
Thanks in advance.

 

[padam]

The SRM323 is a very good amp and there should be very little difference in the newer S model. So yes it should drive the SR507s very effectively.
 
As the SRM600 is a limited amp, it is not better value-wise but it does use better tube which can take a bit more power.