Hi,
I recently purchased a pair of ER4Ps and love the detail. I'm looking for a portable amp that can drive these IEMs and also provide bass boost. I was surprised to find 2 amps that actually allow you to use the ER4Ps as ER4Ss through their impedance feature, ie, the Minibox E+ and the Xin SuperMini IV. Any suggestions as to a suitable amp as I think that either of these 2 would make good choices with the ER4Ps.
Thanks!