both Mouser and Digi-key have the Fairchild mosfets for under 90 cents apiece. 
B+D has one of the Toshiba jfets in stock, but not the other.
I found a surplus retailer in FL web site that has NOS Toshiba, but like everyone else the jfest are 7 or 8 dollars apiece .
The ebay Vishay IR jfet prices are 5 for around $20
B+D has one of the Toshiba jfets in stock, but not the other.
I found a surplus retailer in FL web site that has NOS Toshiba, but like everyone else the jfest are 7 or 8 dollars apiece .
The ebay Vishay IR jfet prices are 5 for around $20
Oh my!
Got my Auricaps today so I hooked it up with an LM4562 I had in the stash and my GH1's. Absolutely beautiful! Depth and 3-D soudtaging like I have never heard before and that Bass! Very happy camper here!
Now I can't wait for my Burson V5i!
Nice build...where did you get your board?
Do you really need input coupling caps if the source is DC free?
Opinions of the LM4562, like any other op-amp, are going to vary.
Personally, I don't care for it's "dry" sound and its p_ss-poor PSSR having tried it in many different applications.
Glad the combination of the coupling caps and LM4562 worked out so well for you and you're now a "very happy camper".
In the end and when all the dust clears, that's what it's all about...total satisfaction!