Ok, first let me confess, I have a similar questioned posted in the power supply section, but I think the question will solicit different answers from the specifically "Pass" crowd here. Forgive me if I 2x wasted your time.
Here goes....
"
I was at a DIYer's house recently and noticed what he explained to me was a Nelson Pass Zen Variation 5 and right there in the amp was 4 laptop power supplies (the bricks you throw in your bag for when the battery dies...). 2 per channel powering each of the push-pull.
Now this amp design is a class A, so I am guessing its always pulling a lot of power.
So it got me curious and I did some research.
1.) on eBay you can buy 90 watt 19 volt power supplies all day, and cheap. They can deliver almost 5 amps each! Seems like enough if I'm intending to use it for a low mids and up on a tri-amp'd set up (horns, so no real need for lots of power).
2.) Nelson Pass himself says the PS in this amp has to be really clean.
"
In the PS forum, I've gotten a few answers and which included adding CL or CR filters. Of course, I can filter like mad and probably make almost anything work.
So the real question boils down to, does this approach economically produce a the same result? Remember I will be pushing some very efficient horns, so any noise will be more likely heard.
My goal is to avoid building the very big PS Mr. Nelson's design includes if I don't have to (360,000uF of caps alone!)
Thoughts?
Here goes....
"
I was at a DIYer's house recently and noticed what he explained to me was a Nelson Pass Zen Variation 5 and right there in the amp was 4 laptop power supplies (the bricks you throw in your bag for when the battery dies...). 2 per channel powering each of the push-pull.
Now this amp design is a class A, so I am guessing its always pulling a lot of power.
So it got me curious and I did some research.
1.) on eBay you can buy 90 watt 19 volt power supplies all day, and cheap. They can deliver almost 5 amps each! Seems like enough if I'm intending to use it for a low mids and up on a tri-amp'd set up (horns, so no real need for lots of power).
2.) Nelson Pass himself says the PS in this amp has to be really clean.
"
In the PS forum, I've gotten a few answers and which included adding CL or CR filters. Of course, I can filter like mad and probably make almost anything work.
So the real question boils down to, does this approach economically produce a the same result? Remember I will be pushing some very efficient horns, so any noise will be more likely heard.
My goal is to avoid building the very big PS Mr. Nelson's design includes if I don't have to (360,000uF of caps alone!)
Thoughts?
