I'm lifting up the National LME49722 and putting in a couple of new ADA4898-1's on a Brown Dog so-8 dual to so-8 single adaptor. These are very good sounding opamps, new and very good specs. Report coming...
I've not found a pin compatible replacement for the 386 heaphone amp chips.
I also replaced those LED's with some Kingbrite blue, blue/green, red and green high output LED's. It lights up a dark room in cool colors.
All caps were changed to large value Panasonic FM types.
Sounds interesting indeed....how would you rank this puppy next to a fireface AD? Meaning with Nationals or ADA chips......very curious if this might be a cheap as chips upgrade to my mix listening.....?
Are you using two AD chips on that BD adapter, or does the adapter just acting as a harness (for pinout compatibility) between the ADA4898 and the main board?
I'm sorta following Mr. Williams here I ordered the browndog and AD parts today...still I wish there was good replacement for the headphone amp...I'll dig around myself...but I haven't gotten my DAC yet so I'm shooting in the dark til I see it.
Jim, are you using two AD chips on that BD adapter, or is the adapter just acting as a harness (for pinout compatibility) between the ADA4898 and the main board?
The 2 ADA4898-1 chips are soldered to the adaptor, then it's soldered down onto the pcb. It's a vertical mount adaptor, very clever. It fits well but I removed the tall 470 uf caps to make some soldering room for it. It also has pins for 8 pin dips on it as well.
would the fact that the outputs are -10 dBV and not pro level +4 dBV cause problems for me in my studio ? Would I have to buy an unbalanced to balanced gizmo and bring the levels up to +4 ? how do you incorporate a product like this into a pro studio ? If used for mastering, would you send the output through a preamp ?