Rig:ASG-2>Hippo Cricri Amp>Cowon J3 DAP
Genres:Rock, Pop, Trance, Classical, Kpop, Mandopop
Design, Ergonomics & Comfort:This IEMs are indeed a pair of nice gem! For mine, it is a clear frosted version. The IEM looks sturdy with a hard shell. As for the size, I would say it is slightly larger than the W4R by around 15%. Fit is good and I'm able to achieve a good isolation with the stock double flange. Isolation wise the W4R is better with a modded triple flange.
Accessories:The otterbox that comes with the ASG2 is rather large. But it's built like a tank! All the standard accessories are included but a few more selection of tips will do the job nicely.
Bass:I would say this IEM is a bass monster! I'm using it with the bass ports almost near zero (somewhere like 1mm opened). The bass are definitely hard hitting with very nice slam and decay. I would say this IEM emphasizes more on the mid-bass impact rather than sub-bass. Although sub-bass is still present especially in bass heavy tracks. Comparing to W4, to me, the W4 hits deeper and more linear. Quantity wise, ASG2 is the clear winner even with only 1mm port opened. With the bass ports turned halfway open, I could feel the mid bass impact creeping it's way upfront and ahead of mids and vocals. Definitely not my preference thus I always keep it at 1mm open or closed! If the ASG2 can have more sub-bass it would have achieved one of the best lows.
Mids and Vocals:As a long user of the W4, I'm inclined to the amazing mids and vocals that the W4 is able to provide. Listening to the ASG2, it does no frail! Both female and male vocals is ever so slightly forward and mesmerize the ears with its lush and smooth vocals. Sometimes it does feel like the singer is singing right next to your ears! It's really something that I've NEVER came across in the IEMs that I've owned and it's SPECTACULAR! I feel that the ASG2 definitely benefits from burn-in as previously I do experience some "harshness" with the female vocals but has since disappeared after longer hours of usage. The mids are not hindered by the thumping bass and in fact blend in very well. Superb coherency here. Clarity wise it takes the lead from W4 as I do find a slight veil covering the lower mids of W4. Instrument separation is slightly or a touch of a hair behind the W4. This could be probably due to the larger soundstage that the ASG2 possesses. In comparison, I do find that the W4 separates instruments by portraying them in a "layered" manner which means they are positioned behind the vocalist. The ASG2 on the other hand, does it nicely by having the guitarist, keyboard, violins etc at both the sides of the vocalist which is in a linear fashion. However it is really an impressive feat for Westones to be able to "layer" instruments so nicely.
Treble and Timbre:Treble wise I would say that the W4 has better clarity in the upper mids region. But that does not mean the ASG2 is "treble lazy". Treble extension is very good as well. It is able to stretch into high notes and regions nicely although not as effortlessly and smooth as the W4. However, with slight tweak of the EQ, it does solve the issue. I do find that through burn-in, it did improve the treble. Timbre of the ASG2 is fantastic! Instrument sounds really natural. In some tracks, it sounded so real that made me thought it was coming from my surroundings! Honestly was pretty shock by it. Unlike most BA IEMs which puts cymbals snares pretty artificial sounding. Really a hands up for the ASG2 in this area!
Soundstage:Soundstage in this case, the ASG2 is packed with a pretty wide soundstage on par with the TF10. Soundstage is width and depth does well with good headroom. In comparison, the soundstage of the W4 loses out.
In conclusion, in my opinions, the ASG2 is a fantastic IEM in it's price point. It houses a sound signature that is ever so addictive! I would say the ASG2 is an upgrade to the W4 unlike the Heir 4ai, in my opinion is a side-grade to the W4. Kudos to the ASG2!!