Originally Posted by Sinocelt
I doubt it. The ER4S has slightly less bass, and is otherwise similar (FR-wise). I'm more sensitive to highs than average, true, but not enough to explain the rather sharp increase in volume I perceive starting at 1.5 kHz (and culminating at 3 kHz and 8 kHz). Very simply, I think that Etymotic's measurements aren't perfect. I believe their IEMs aren't as neutral as advertised but are louder at higher frequencies. Why don't you test them yourself?
I'm a Caucasian living in Taipei. Of course my nose will look slightly prominent!
Well, the 4.A has much more bass than the ER4S and is more neutral to my ears.
I haven't made a chart for the ER4S, but I've made one for the HF5 (same drivers, not hand-matched, different impedance, a bit more bass) and I hear it start to roll off as early as 125 Hz. I also hear a rather sharp increase in volume starting at 1.5 kHz, up to nearly 12 kHz.
To my ears, the Atrio (MG7) is a lot flatter.
Difference between 45 Hz and 12 kHz:
- HF5: 27 dB a
- MG7: 12 dB
- 4.A: 21 dB
- HF5: 36 dB between 45 Hz and 3 kHz / 8 KHz
- MG7: 15 dB between 45 Hz and 2 kHz
- 4.A: 21 dB between 45 Hz and 3 kHz / 4 kHz / 12 kHz
This test was conducted with a DACport at max volume, starting from -60 dB at 1 kHz.
Etymotic use a Zwislocki coupler, a very fine piece for measuring. The accuracy of the Etymotics line-up has also been highly re-approved by 3rd parties throughout, matter of fact they're used as a reference most in most cases. It's still not without it's controversies but it's still very very accurate, no doubt.
To my ears with stock dampers and triflanges. The HF5 does have a slight bump at 1.5k, but it's then a bit conservative throughout the midhighs and treble and roll offs at like 15k, till finally finishing off at 17k. I am currently using modded tips and red knowles dampers which increased bass a little, evened out frequencies pats 1k due to the dampers but increased the whole treble regions because of the short wide bore tips. To my ears, it's one of the most neutral set-ups I've ever heard, will be surprised if the 4.A can at least be on par (which I will know soon).
ER4S is not HF5 with less bass. It does have less bass but regions from 1k to it's limits are increased overall, becoming flatter, the HF5s with stock tips and filter are a bit conservative if anything, given right fit.
Note, things can highly change without proper insertion depth or tips. I know with really long tips or a more shallow insertion the treble can become uneven.
Such a claim for the MG7, considering it's never mentioned as neutral.
That's a poor test to try out frequency response, try a good old frequency sweep, this one is odd then again it's not meant to do a test such as this.
Edited by Inks - 10/4/12 at 11:38am