That's all good to know.  Thanks for the information.  I'll play with them some when I get my new pads. 

I guess I will keep mine after all.   Can anyone tell me if it is possible to replace the inner ear pad that seems to be glued to the area around the driver.  Both sides on mine really need o be replaced.  I know I can get new outer pads but I'm sure that the inner pads have an effect on the...

I've started mine.  One sigma board is done.  I only ordered two of the 4700/63 caps so I have to wait for the others to get here before I can finish the other one.  I hope to get the amp boards put together this week.  I have not decided on a case yet so for now it will be on a board on my...

Quote: Thanks for that list of truly geeky information.  I'm one of those that likes as much "useless" information as possible.    I'm waiting for a couple of regulators that Mouser was out of to get here from Digikey.  Then I will start putting it all together.

One thing I learned from the first board was that the two dac chips were a pain.  I must have re-flowed them 4-5 times before I got it to work.  I also found that a decent pair of curved jewelers tweezers are your best friend when dealing with the 0805 parts.  That and a good magnifying lamp.  ...

Just chiming in to let Tomb know that my board and parts arrived today.  I plan to add the needed parts to a mouser order this weekend.  Hopefully I can get it up and running in the next few weeks.

Thanks, for the link.  I like that you can upload your own .dxf file for them to use.  That makes things very convenient.    Mullet, let us know what you find out.  As long as the price is good I'm in.

FPE does good work but I am not a fan of the software.  It may just be me but I can draw a whole 3D model of a face plate in Sketchup in about a quarter of the time it takes to just get things set up in the FPE screen.  Maybe I completely missed something but I still have not figured out how to...

One more thing, can we get an updated schematic along with the BOM.    Now that I have some more parts to play with I plan to do a little experimenting.  I've got a lot on my plate tight now but this will be worked on between other personal projects and some builds I'm being paid to do.

Is there an updated BOM or is it all the same parts with just a different layout?   I will be able to compare it to the original prototype and a couple of different Buffalo 3 builds I'm doing.  I know the Buffalo is not a fair fight really but it would be nice to how they compare.

Quote: If this is the same as the first one a bit challenging is an understatement.  I think I remember trying to re-flow both those chips three or four times and still had to play with it some before I got it right.   

PM sent.   They look nice Tom.

I am starting mine next week. It will be a fully balanced build to go with the Buffalo 3 that I am working on now. Still undecided on the attenuator though. It will either be a Goldpoint, DACT, Khozmo, or δ1. The plan is to use Plitron transformers, PRP resistors, and Nichicon FG caps. Hopefully...

Thanks for such a detailed (and expensive) review of these amps.  I had three of the four on my short list with the B22 at the top.  I should be starting mine in a couple of weeks.  Just finalizing details.  I hope for my sake that it does justice to large scale orchestral work(Wagner/Mahler)...

Quote: Thanks for correcting me on that.  I was going from memory, bad idea these days, and knew it was a Woo Audio amp.  Guess I should have looked that one up first.