Found this on Ebay...looks interesting.   http://www.ebay.com/itm/Finished-High-quality-base-on-A1-Headphone-AMP-Amplifier-full-aluminum-chassis-/140893067806?pt=US_Amplifier_Parts_Components&hash=item20cde19a1e   Anyone own or listen to it?   

Does anyone know the DAC used in the latest Xperia phones?   I'm interested in the Xperia Acro S   I see that it has USB tethering....so will it also allow bypass of the internal DAC with an external one?     Anyone compared these newer Xperia phones with the Galaxy S3 GT-I9300 or...