I'm not sure maybe some differences in electrical specs. I'm using the BP

I'm satisfied with them. I think the sound is much cleaner and fuller/more satisfying compared to the stock op-amps. I got the opa1612s including adapters and shipping at 48usd total from browndog. The opa627s I bought from element14 at 117sgd total.

I'm using opa1612s for IV and opa627s for diff-single conversion

Been waiting for this, thanks very much!

App control thru bluetooth is slower compared to using usb host. Hopefully they will improve this

Wow! So they would fit in the x7

There's the smaller burson v5i

Hi, found a link descibing these x7 op-amps, hope it helps. http://bit.ly/1vUZ6Wt