I am in a bit of a quandry with regards to whether I would gain any major benefits from using a portable amplifier with my iPhone / iPad?
At the moment I have fairly easy to drive headphones (Grado SR80i's / Beyerdynamic T70p / Sennheiser IE6) all of which are used with my home based Netbook system via a uDAC2 (soon to be replaced with an Arcam rPac) as well as my iPhone / iPad when I am out and about, in the office, Away from my Netbook Station.
To my ears these sound OK through these devices directly out from the headphone socket.
I am about to invest in a new set of higher end IEM's probably the Heir Audio A.4 / A.4i or Westone 4R......possibly the Klipsch Image X10i are under consideration as well.
I believe these are all fairly easy to drive IEM's as well and should cope directly out of the iPhone 4S.....but I cant help wondering whether I would gain any additional improvement in sound by using an external amplifier.....possibly one of the following:
- RSA Hornet
- RSA Tomohawk
- Fiio E11
or am I likely to gain bigger improvements longer term by looking at something like the Fostex HP-P1, GDAP X or CLASS combo.....all of which will obviously by pass both the phones DAC and Amplifier (albeit also a lot more expensive)?
Can anybody offer any advice or help with regards to this matter.
Also can anbody comment on the difference between the Heir and Westone IEM's?