Hi,   Doing some research here.    Many products claim to support "600 ohm headphones", so I tried to find out what these are. Doing a search on Google and here reveals only the Beyerdynamics headphones. Are there any other headphones that has a 600 ohm impedance? I checked the Sennheiser HD...

Hi, Sorry if this has been posted, stuff like that can be hard to search for. Are the sound differences between Op-Amps supposed to be very subtle? I swapped the OPA2132P in my META42 with 2 x OPA637 and couldn't hear much differences (if any). Is it my ears? I am using AKG 271S for...

Hi, Is there a formula to calculate the inner-loop gain of a multiloop amp like the META42, PPA etc? I did a search here and the closest I can find is this thread: http://www4.head-fi.org/forums/showt...nner+loop+gain which is not very conclusive on the way to calculate the inner-loop...

Hi, Silly question - how do I remove the cable of my AKG 271S? I pressed the little 'button' on the side of the connector but it still won't release it even with some pulling. Didn't dare to exert too much force lest something breaks. Thanks in advance. Regards CK

Hi, Came across this while looking through tangent's site - the PIMETA - PPA-Inspired META42 which uses the PPA topology. It also uses the BUF634 as the EL2001CNs have been discontinued. Main page of tangent's audiologica page don't have the link yet though, so here's the link...

Hi, Sorry if this has been posted before, but I tried to do a search but didn't come across anything useful. For META42's C2/3, what differences will I get if use something like the Elna Cerafine/Silmic, Nichicon, etc instead of the Elna Stargets (470uF, 35V) I am currently using? Is the...