Nice review secondreef.I too have the total Airhead and was using ET4s for the past year or so.However,the near total isolation became a nuisance after a while.Also not so easy to let a friend use the ETY's!Anyway,I returned to my previous favourite Grado,this time opting for the SR325 over my old SR125.While the Total Airhead works well with the Etymotic ER4s it doesn't do so well with Grados.At the time of my SR125 ownership I used the Grado RA1 with excellent results.I am interested in hearing a comparison between the Airhead and Porta Corda using Grado cans.If all else fails,I will return to the RA1 but would prefer the easy portability of the Porta Corda.Maybe someone out there has experience of all three with Grado 'phones.I am also looking for a suitable home based amp for the Grados and would appreciate any feedback on this
