The sub-bass is light, yet the total overall bass is very good. Since I don't have other buds that use a "Aiwa" type bass tube system I don't know exactly what to expect. From what I've read about the ES-P3 buds is that the Ucotech CEO, Mr. Shin was on the team for designing the Aiwa V55 earbuds, so that at least lends some credibility to the design of the ES-P3's. I think the bass tube system definitely has an impact on the bass, maybe not on quantity, but definitely on the quality.Thank you for your impressions!
I did compare the graph to your graph of the artiste Nightinggale.
I am aware that you did not do any comparison to any other bud. It is probably a good practice to not do so, but "learn" the tuning of an earbud and do full brain burn in and judge a bud on its own merits...
You write "the bass region may appear lower in the graph than actually perceived". Do you feel the bass to be linear up to a certain point and having subbass rolloff as usual in a bud, or do you think the U-shaped bass tube actually has a benefit here? Because this is what their product description suggests...
I simply cannot help but realize that the bass rolloff looks very similar (basically identical) to your measurement of your Artiste Nightingale. -4db from 200 to 100HZ and -4db more from 100 to 80HZ.
In the treble at 8k both are at -4db relative to 1khz.
While the shape of the pinna gain is different in both buds and I don't expect them to sound alike, from the graphs I would deduct that they have a similar tonal balance.
Is that in case true or am I reading the graph wrong/the graph doesn't tell the whole story because of the different fit of the buds in the measurement rig?
Also: How does the fit with the stock cable work for you? Apparently it is heavy and stiff...
Lots of questions for the new year. Sorry.
Love the look of this bud and might be interested in trying it out - but if the bass tube is nothing but a gimmick and we end up with usual earbud bass but have bad fit because of it (the stem including cable looks loooong, evokes bad memories of RY4S Mmcx pro),
Then I'd definitely stay away...
The reason I said "the bass region may appear lower in the graph than actually perceived" is based on the official FR graph of the FiiO FF3 which is one of the bassiest earbuds around. I'm not saying that my measurement rig is even close to FiiO's professional measurement rig, just that the bass region measurement has some similarities.
The ES-P3 bass is different (fuller bass) then the Artiste bass even though there may be some similarity in their graphs. I guess that is why FR graphs can't be totally relied on to tell the whole story of how (in our case) earbuds will sound.
Published FF3 FR graph:

Edit: Here's the FF3 FR measurement I made with my rig for comparison against the official FF3 FR graph. The graphs are definitely not the same due to equipment and measurement differences, though there are general similarities which in my opinion are close enough. I think it would be hard to tell what the earbuds would really sound like from just looking at either of the graphs. Unfortunately the only way to know how they sound is to try the buds for yourself.

The cable is thicker and heavier than other cables that I have. As noted in reviews, when sitting still the cable doesn't affect the fit of the earbuds. When walking around the cable weight can cause the buds to shift position and change the sound. I think Ucotech is very aware of this situation, hence they provided rings with hooks to stabilize the earbuds. The buds fit in my ears pretty well, but do occasionally slip when moving around. My trick to fix that is to rotate the buds at the MMCX connector to position the buds in such a way that when I put them in my ears the rear portion of the earbud twists inward toward the concha and help lock the front portion of the buds into the intertragic notch. I find that earbuds will slip out of my ears if the rear portion is rotating outward away from my concha due to cable twist.
Hope that helps.
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