Can't say I liked the COP too much. Muddy and poorly extended bass which I would have forgiven if the midrange weren't so thin and lackluster. They were very well built though. I guess I just don't like the Beyer sound as a very thin midrange seems to be a theme I am running into with them.

Tsk tsk Logitech. The high end of the iem market is the last place where you should cut corners and have quality control issues. Way to tarnish the UE name and I hope that Logitech has learned from the discontinuation of the UE900. Logitech offered to sell me the UE900 for $300 a few months ago...

How long do the ER4 filters usually last before they have to be changed?

It has been 22 years and there still has been no reasonably priced single BA iem that can beat the ER4.

Fit is subjective. I get a perfect fit with the Tf10 but the insertion isn't too deep unlike iems like the 4r, so they wont isolate as much noise.

Get the TF10 while you can. I regret selling off previous TF10 and now that I got another one I am never letting go of it again.

How long do the ER4 cables usually last with frequent usage?

The ER4 beats many multi-drivered items I have owned easily.

12 drivers per ear feels gimmicky. I mean I felt that the 6 drivered JH 13 didn't give much of an edge over the single drivered ER4S in my opinion, so who knows how better 12 drivers will be.

Is it true that you can't get any Etymotic cables unless it's one of those specialised and expensive cables? I'm thinking of getting one of those adapters on eBay so you can use a Westone cable instead.

  I guess it was because of the massive price difference between the the two. I probably over exaggerated as the JH13 was a little more detailed if memory serves me correctly, however, I felt massive diminishing returns with the JH13. I like the bass presentation on the ER4S better because...

I got my ER4PT today. It sounds absolutely beautiful with the ER4S converter hooked up to my amp and DAC. Everything sounds as it should be, close to what the artist intended.  It has wowed me much more than my JH13 Pro ever did, and I like it even more than my...

Neither one is better than the other, it comes down to preference. -I found comfort for DT880 and Q701 are about the same.  -Bass of both extends well, but DT880 has more impact. -I liked the Q701's midrange a lot more than the DT880. The DT880 has very thin mids which I don't like...

Thanks guys. UM charges $50 + $20 shipping for a cable to Australia. I may as well get the Fiio Westone Cable for $38 shipped instead.

Does anybody know if the Westone cables will fit into a UM shell with a recessed socket?

I much preferred the AD900x over the AD900. The AD900 sounded too polite for my tastes while the AD900x has more impactful bass.

$100 as well.

Can anybody comment on how the AD900x sound next to the AKG K701/Q701/K702? I'm thinking of getting one of the AKGs but don't want something that's going to sound very similar to each other.

Has anybody else replaced their HD580/600 headband pad with the HD650 one? I find the HD650 headband pads much more comfortable on my head.

I'm finding the AD900x are complimenting my HD580/600 really well. HD580/600 has more clearer mids while sounding laid back, but the AD900x has a more bass and treble impact making for a more energetic listening experience overall. 

JH13 Pro. Granted it is the best iem I have ever heard, however, the sound is too linear for me and no matter what people say a BA is never going to sound as natural as a good old full sized dynamic driver headphone. I enjoyed my HD580 so much more as a result and the JH13 Pro sat in it's...

Is there any other reasonably priced cables out there besides the one UM sells that would fit the recessed sockets of the earpiece?

Of all the headphones and iems I have ever owned the TripleFi 10 is the headphone that I regret selling the most. I saw a good deal on a brand new TF10 and couldn't resist snapping it up. Can't wait to be reunited with them!

I have a 12-13 year old HD580 and they sound just fine.

Liking the AD900X, it has quite a bit more bass impact than the AD900 which I love. The AD900 seemed to have too little bass impact and sounded too polite for my tastes as a result.