Moderator: kabubi
endrik35 wrote:Congrats Loi! That's one bad ass amplifier. Even Leslie decided to call it game over with the 25 watts class A version. Unless your speakers has very low sensitivity, you don't need the extra 75 watts of juice
brainf wrote:Awesome effort there Loi! Thanks for sharing your build progress.
Have to agree - class A rules!
AbadSantos 7 wrote:The Power Supply:
I use dual mono set-up for best possible result.
I decided for CRC filtering method with 12,000uf X 16 per channel which has 20mv amount of ripple loaded.
Transformer is at 400VA each. At 1Amp bias, there are very silent. However at 1.6Amp bias, I can feel already
some mechanical vibration....wont rise the bias as of the moment...
Need to control also the inrush current and a soft start circuit is a must...
I will plug amp the Amp directly to the wall outlet, thus I decided to put a dedicated power filter...
AbadSantos 7 wrote:Sir Tony, Les,
Thanks for the comment.
I believe you are correct about this mechanical vibration thats why I just keep my Bias enough not to stress more the torroids.
For my next build, I will pay attention on the size and ensure at a given bias still be quiet (Im planning at 2.4~2.8A per channel ).
tony wrote:you may want to consider EI traffos also, they have gaps which serves as relief valves in the event of higher current draw so that they do not saturate easily....just my 2 cents....
tony wrote:class A amps are 25% efficient compared to class D which are 90% efficient so that you can just imagine the heat levels involved...
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