Choy Wei De
100+ Head-Fier
- Joined
- May 16, 2017
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Tubeless build??
I am not getting a clear idea
If you mean the shell, and placing driver...
Nice..
Well the first shift of diameter from 1.2mm to 2mm makes a very slight low pass
A. Low pass resonator
B. Resonant damper
C. High pass
D. Helmholtz resonator
Secondly
It reduces the air pressure hitting ear drum
And smoothens out the sound profile of treble..(micropeak damping
After that is a gradual increase of diameter to have stepped horn, so I can have some increase of High frequency as RAB has steep roll off after 8kHz~10kHz.
Damper goes in horn, and it damps the midrange peak at 3kHz, damps tube resonance, horn resonance and ear resonance.
Brown for neutral bassy, white for brighter profile
Zobel is needed in this setup to compensate the variable diameter tube acoustic impedance shift.
First of all, the series low pass resonator of such a small size doesnt effect FR in huge manner..it is for very fine tuning on soundstage
@Choy Wei De will explain how it effects the soundstage..
Bigger resonator makes sound take some distance, mid bass thinner and subbass rumble.
We both tuned it in such a way, that we can have desired decay in bass and good treble extension..
@homerograco
The way I understand is very unique.
A smaller ID tube is like a river with rushing water. The surface of the water is not travelling the same speed as underwater, not cohesive.
When a river flow to a bigger tube, ‘pond’ or ‘lake’, the surface of the water slow down and back in sync with underwater. With the correct size of the pond, when the water enters into a smaller river. The surface of the water is right at the same speed as underwater. If the pond is too small, the surface of the water is still faster than the underwater. If the pond too big, the water is too calm and the sound will become muddy. Just need the right size of pond.
The horn is like when a river adapt to a delta and flow into a ocean. If you use a hair dryer, the wind is very narrow and very forceful. But if you maintain same energy and spread it wide like a using chinese hand fan or use a big styrofoam as a fan, the end result is quite smoothing and very cohesive.
Weird explanation, but it helps me understand tube design and soundstage.
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