which of the older model's are a best buy. I hear alot about upgrades,comments and model numbers appreciated.
I agree. Jon is excellent, has done work for me before. I will say more tomorrow. Whatever Threshold amp you buy, you will have years of enjoyment with it. My personal favorites are the SA/1's (mono-blocks) which were upgraded to 10E's, and balanced configuration in silver.
A good place to get started is with the Threshold Cascode 1 at 75 RMS per side or the Cas 2 at 100 per side. For Class A the 400a is very good.These are usually reasonable starting at $400 for the Cas units and roughly $600.00 for the 400a. From there you can go to the model 4000,now it starts to get expensive. There is a web site devoted to vintage Threshold equipment. Well worth reading and the gentleman that works on this equipment is Also his web site is Vintage Amp Repair. Understand he worked at one time at Threshold. His knowledge and undertanding of Threshold is second to none ---Look him up.