New portable headphone amplifier OPA132+AD815 development

[Ant1Xr1st]

1. 4 Li-Ion mobile phone batteries 1000mAh (maybe six of them will be better?)
2. OPA132 (150uA class A bias) (is it enough? there is no perfomance difference in microcap)
3. AD815 (or THS6012; THS6182)
4. Gain 10dB
5. 10k potentiometer
6. Battery status monitor (is there any simple circuit for it?)

Any comments?
 

 

[Spacehead]

Will you build a prototype? 

 

[Ant1Xr1st]

Yes of course. I'm waiting for AD815 arrival.

 

[kevin gilmore]

The bigger problem is that the AD815 has just been pushed into the end of life,
last time buy category and all the vendors i have checked have none in stock.
 
Looks like it would have been a great idea a few years ago.
Does not seem to be any similar chip that can work at the higher voltages.

 

[Ant1Xr1st]

kevin gilmore, THS6012 is very similar to AD815. I have choose the second one - some people say, that it has a bit cleaner sound on high frequencies.
Some pcb madskillz:

 

[wintwu]

what's the latest on this?