Cassadian
500+ Head-Fier
- Joined
- Jan 29, 2012
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- 32
How did you manage to retrieve a demo?
Nobody has enlightened me yet on why it seems like my driver is sealed whereas the merlins in all the reviews seem different. I reckon i could fill my merlin with sand and have no ill effects.
Any news from UM about your customs?
Maybe UM contracted with a different dynamic driver manufacturer? Listen to some bassy tracks and try to determine if the driver pushes air or not- if it does, then the driver isn't sealed. If it doesn't, then you're right and your driver isn't vented.
Ba drivers don't really push air the way that DDs do- you definitely won't feel it. As far as DDs- you're right- all DDs push air, but some more than others, and the IEMs with ported DDs do so palpably to the point where you should actually feel changes in ear pressurization (the Merlins do this to some extent, and the mg6pros even more, for example).
A ported DD is similar to a sub-woofer, but on a microscale- no IEM has a little pump that "continually blows air" just like how a sub doesn't have a big pump that "continually blows air." The whole point of Merlin's using a port in the first place is so that its DD can suck in a massive amount of air to push out to your ear canal in the form of sub-bass. Like a sub, it's not continuous.
That plugging the vent doesn't affect the sound at all is pretty indicative that your DD is not vented. Also, its strange that the sub-bass doesn't reach below 23hz....
I just bought a year-old pair of Merlins that I'm getting remolded, so I'll check out my older merlin's design and sound when I can, as this is something I'm curious about. I'll also see if my my DDs have holes when I get them, and don't when I get them back.
It's not shocked that a YouTube video couldn't go lower than 23Hz. Compressed files tend to remove information at the frequency extremes. I'm surprised it even went that low. Also, depending on your soundcard or DAC, that might be the limiting factor as well.
http://www.youtube.com/watch?v=E7Bkrypxzs4 - wow! it's like that thing has gravitational pull!
Maybe the crossovers are what differentiates Rooths from UM?? Supposedly different designers but the offerings between UM & Rooth seem to be the same.
After reading most of the posts, it seems to me isolation is the Merlin's weakest feature.
Would ask UM to cut the ear mould a little longer help to solve this problem? I'll be using the Merlin in a quite environment and don't want any sound leaks.
Many thanks