Be it BA or Dynamics, I have always had a preference for a single driver IEM. My holy grail is ER-4S for neutrality and the FX700 for enjoyment. I've heard the ATH-CK10, ADDIEM, TF10, FXT90 and they all sound weird. The JVC FXT90 uses no crossover but relies on the differences of the drivers to filter the frequency response. I found them no better than the HA-FXC71.
I understand the XBA series have no circuit based crossover, I may try that as the last multi driver setup.
The ATH-CK10 and ADDIEM sound quite good, but do they really need an extra driver. The ER-4S has better clarity, detail and speed than both. I understand BA's have trouble with deep bass this is why I have the FX700.
Lastly the TF10, sounds horrible, no midrange, jumbled sound, I understand it's a 2 way triple driver IEM.
What is wrong with me? And I've found this quote from the Ety Kids thread from a member, is this really true?
I think their philosophy has always been that the crossovers that multiple driver headphones need mess with the sound.
They seem to take the frequency response curve detailed in their founder's papers very very seriously. The president is a Doctor, they make a huge amount of hearing aid products, and they seem to publish a great deal of research papers.
In short I think they are highly results motivated company that doesn't move particularly quickly, nor is it inclined to. They probably think of the ER-4S as measurably and objectively 'perfect' and until they can find a better technology or a better way to make them, I don't seem them doing anything new. Thinking about how long it took them to come up with the MC series (which sadly I didn't like) you have to admit that there is a certain aura of respectability about their approach.
Anyway, I'd like to have a discussion on this as it's been bugging me for a while and forgive me for my English, I have problems structuring sentences, long live spellcheck.