Originally Posted by Mshenay
Best is subjective really... the Zo Bass is more Colored and there is more of it, but you run the risk of BLOATING... where as the E11 is a Cleaner Bass Boost, but there is slighty less of it but also less chance to Bloat... so for example my Xb700's would LOVE a ZO because they are already so ZOMG BASS BOOSTED, where as my Dt 990 Pro 250's... I'ma stick with the cleaner leaner E11 bass boost...
Also how is the Agression on the ZO, the E11 is a NASTY little amp! Brings in some NICE detail and Attack on that bass
ZO is fantastic with my headphones, I hear details more easier in the midrange with Q40 especially, I keep mastering hardstyle tracks with my ZO activated, I usually pick up faint extra noises that's more of a usermistake easier with it for example, has already happened a few times that I hear something that a newbie producer on his 150~$200 KRK monitor speakers couldn't pick up.
I use mostly the ZO2.1 though, haven't used ZO2.3 enough to be able to accurately comment on detail perception. But ZO2.1 provides me lots of added punch but also more control. The FiiO bass boost also boosts lower mids a fair bit while the ZO's bass boost only affects <300Hz range.
Edited by RPGWiZaRD - 12/2/12 at 10:29pm