…is quite the shift. Would you be willing to purchase (and potentially return) another RHA T20 to see what % of this is mind-over-matter, so to speak? I’m guessing 99% brain and 1% mechanical burn in.
@svk7 - I've had my T20 replaced three times and can confirm that there is quite a difference in sound after 100+ hrs of use. The human brain does not require 100 hours, or more, to adjust to a new stimulus. Adaptation and attenuation are quite rapid.
@HeartOfSky I appreciate your use of exact and descriptive psych terms.
I tend to agree. It took my brain 2-3 hours to adapt to and appreciate the Lola’s sound signature, and I feel like it’s become a little better as I reach the 100-hour mark (but have another sealed one and can confirm if that’s the case in a few weeks).
However, my 300+ hour Roxanne’s sounded no different from my second pair of Roxanne’s so I remain skeptical.
@DoctaCosmos I've only owned the T20 from the RHA line up, but you're right -- it seems like the MA650 model can pose quite a challenge to keep in place. The MA750, on the other hand, holds more promise, as it has over-ear hooks, similar to the T20. I'm really enjoying the T20's kidney / bean shape, as this type of form seems more natural for the human concha.
@svk7 Thank you! I received a replacement unit after the wire of my original unit broke. And upon first listen of the replacement unit, I still had the same impression: dark, veiled, etc., but to a much lesser degree (not much of a system shock anymore)....
@svk7 ......But while waiting for the replacement unit (which took almost 2 weeks to arrive), I was flipping through the IT03, GR07 & AF56, so my ears weren't too "saturated" with a particular tonality or signature (compared to when I first listened to my original unit -- I was using the FiiO EX1ii as a daily driver, so the difference with the T20 was much more glaring against FiiO's open, airy sound & brighter treble). .....
@svk7 ....Now, after about the 150 hours of burn in (of the replacement unit), I can flip through my other IEMs with my ears/brain adjusting quite swiftly to the IEM's sound presentation. This allows me to enjoy each one given their own signatures.
@svk7 ... The T20 is really warm (there's no denying that) and quite intimate (compared to the others that I have), but I'm enjoying its signature, as it creates a contrast to my usual serving of pronounced lows, slightly recessed mids, bright highs, spacious soundstage and detail-rich presentation. IMO, the T20 has the most natural sound in the vocal range (based on my current IEM roster), albeit being a bit dry (especially lower mids).
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