Thanks. Seems like UM Pro 30 V1 would be more up my alley.
How is the sub-bass extension of the Pro 30 V1 compared to Pro 30 V2?
Both the Pro 30 V1 and Pro 30 V2 seemed to have similar sub bass extension to my ears. I found the W60 V1 and the W40 V2 to be better when it comes to sub bass extension than both the PRO 30s. The PRO 30 V1 and V2 are adequate in sub bass extension but the W40 V2 has slightly more "heft" in the sub bass because of the lower extension. That said, this is just extension as the W40 V2 has an "airy" sounding signature and does not have emphasis on the bass IMO.
Something to beware of is the forward presentation of the UM 30 PRO V1. I'll share my experience.
I used to own a UM 30 PRO V1 back in 2014, sold it away after a month and replaced it with the W60 V1. Back then, I've to admit that I was not used to the UM 30 PRO V1's forward sounding / "in-your face" presentation thus my reason to sell it off and replace it with the W60 V1.
My enjoyment with the W60 V1 was short-lived though. After 4 months with it, I realized I missed the forward, impactful, fast and aggressive nature of the UM 30 PRO V1. The W60 V1 has a wide and laidback presentation, the low frequency, both sub bass and mid bass has both quantity and texture, more so than the W40 V1 at that time especially in quantity which was why I thought the W60 V1 was the ideal one for me. I think it was due to the fact that I went from a forward sounding IEM back to a laid back sounding IEM that had plenty of "space to breathe", the sudden change in presentation made me learn to appreciate and also realize how exciting it was with the UM 30 PRO V1. The vocals were so forward I felt like I'm standing on the stage with the singer and right beside the drummer and the other musicians with lesser "breathing space". The W60 V1 sounded boring/less engaging to me as I felt further away from the instruments and the singer. I sold my W60 V1 because of this.
The UM 30 PRO V1 are definitely uniquely tuned with its presentation IMO and may turn off first time owners/listeners like it did with me. I think because of the forward presentation / small sound stage, drums, especially snares hits harder as well. Instrument separation is great too, they do not get lost in the sound and their all decently spaced out and easy to focus on.
As I found them to be sensitive to the type of source device, I pair them with a warm and dynamic sounding source device/dac as it unlocks their full potential IMO.
So fast forward into early 2020 while casually browsing B&H, I saw the UM 30 PRO V1 on sale and immediately jumped on it. I'm glad to report that I've ended my audio journey since
(Till it quits on me at least). Just be aware that the forward sounding nature may not be for everyone, though if given time the energy and excitement it gives in exchanged for the reduced soundstage might grow on you. Alternatively you can simply complement it with another IEM that has a more usual sized soundstage.