Welcome to the forums
Go to ebay.com
search for seller biosciencegeek
don't be scared by the low price
excellent match to er 4s
Thank you ricksome! I've also read a lot about pairing them with DAC/amp not just with an amp.
Could you please tell me about what is the difference between them? So is it not worth to put more
then a £100 and get the Fiio E12?