I'm about to purchase the fets for my Aleph-X's. Due to using parts from an existing chassis, I'd like to stay with TO3 style outputs. So, here's my question:
What is the subjective difference in sound quality between the IRF140's and 240's really worth? My inclination is to go with the 140's because they were designed for higher current... But, how noticeable is the difference?
Also from a matching perspective, I need a total of 96 matched fets. I can buy either part number all from the same lot so that will help, but how many should I buy to get 96 matched devices? I was planning on buying 150. Is that too many?
Lastly, on one hand it's only a couple of hundred bucks difference between the two... On the other hand that couple of hundred bucks directly translates to a bill going from $525 to $750 just for output devices - hence why I'm taking the time to ask...
Are the 140's really worth the extra couple of hundred bucks???? I'm figuring on using these in a biamp configuration and am planning on keeping them for a long time...
Thoughts?????????????
Thanks!!!
What is the subjective difference in sound quality between the IRF140's and 240's really worth? My inclination is to go with the 140's because they were designed for higher current... But, how noticeable is the difference?
Also from a matching perspective, I need a total of 96 matched fets. I can buy either part number all from the same lot so that will help, but how many should I buy to get 96 matched devices? I was planning on buying 150. Is that too many?
Lastly, on one hand it's only a couple of hundred bucks difference between the two... On the other hand that couple of hundred bucks directly translates to a bill going from $525 to $750 just for output devices - hence why I'm taking the time to ask...

Are the 140's really worth the extra couple of hundred bucks???? I'm figuring on using these in a biamp configuration and am planning on keeping them for a long time...
Thoughts?????????????
Thanks!!!