Shadowelite
500+ Head-Fier
Correct but a dual est uses one nozzle not two
IMR Audio : Sonic Adventures & Impressions
- Thread starter NellieG
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The forum guidelines say you should avoid friends and family and most of the time I would agree with this however I've done business with some people a number of times so a bit of trust develops.
Standard PayPal is safer though
Normally I agree to go 50/50 on the fees
If posting abroad be careful of postage costs
9 of 10 times I've made f&f payment with PayPal, but as I said I made it with trusted users. However, it's not really recommend behavior
holsen
Headphoneus Supremus
I havent had one deal go sideways. Everyone one of them has been seamless and easy.... BUT I always check the other party's feedback score and if it is good - as an act of goodwill - I send the funds F&F and let them know I'm doing as a courtesy. Sometimes I get a small break on the price or they ship quicker because of it (they choose a quicker and higher priced shipping method) As a seller, I normally also ask for F&F and refer to my feedback score. If you are new user, just start building your feedback, it will reward you in the end.
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Shadowelite
500+ Head-Fier
Thats a quad est
As you can see theres a double ba ( ests r basically ba) and two double's connect to one amp
This is a dual est like what the avalon and enigma have
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I see 2xEST and they are double
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fablestruck
1000+ Head-Fier
How do A.M.T. and MEMS drivers work?
https://headphones.com/blogs/featur...ook-at-mems-the-next-step-for-in-ear-monitors
And for AMT (which is basically a pleated diaphraghm):
Unlike a planar ribbon tweeter, the AMT's diaphragm has a bellows-like pleated shape. Using a folded sheet of polyethylene terephthalate (PET) film with metal etching, the AMT moves air sideways in a perpendicular direction. An AMT tweeter can reproduce sound up to 650 Hz and is particularly suitable for high frequencies. In high-end multi-driver speakers, the AMT tweeter is sometimes used as a midrange tweeter or in combination with horns.
To pump air through the reed chambers, the diaphragm physically moves back and forth in a motion similar to that of an accordion being pulled in and out, albeit over a much smaller range of motion. Due to the extremely low mass of the polyethylene substrate and the significantly shorter distance it travels with each "swing" compared to a dynamic driver, the result is a dipole driver with an incredibly fast response. In a technical sense, it shares characteristics with an electrostatic driver. Order high-quality AMT tweeters from well-known brands such as Dayton Audio, Monacor, Mundorf, Dynavox and SB Acoustics at SoundImports.
For the DIY'er diving deeper into the technology: each diaphragm bending moves very little air, but due to the folded structure, more air is moved than by an electrostatic or conventional cone driver with the same expanded surface area. In terms of area comparison, the functional driver area of an 8-inch (200 mm) round dynamic cone is comparable to a standard 1-inch (25 mm) wide AMT strip.
Due to its folded driver design and small motion range, the AMT behaves like a point source version of a larger driver, which naturally leads to lower sound reproduction distortion. The name "Air Motion Transformer" comes from the fact that the speed of air as it leaves the diaphragm is about five times that of the driver structure
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You should also know that Bob runs the MEMS driver without an energiser due to the size, so it isn't properly fully range. He has stated to me before about the driver in the Seraph that running without the booster rolls off the bass and low mids, but the highs output is still OK, so he's basically using a manual crossover to just use his MEMS as a tweeter, if I understand correctly (and he is right about the ability to use them without the energiser). The Seraph definitely has impressive treble, so got no reason to doubt hi that MEMs is doing something in the sound.
And for AMT (which is basically a pleated diaphraghm):
What is an AMT tweeter?
For DIY audio enthusiasts looking for a unique tweeter with excellent performance, the AMT tweeter is an interesting option. AMT stands for Air Motion Transformer and was invented in the 20th century by scientist and physicist Dr Oskar Heil. The AMT tweeter differs from other loudspeaker designs such as moving coil, planar-magnetic or electrostatic driven speakers in that it uses a different transduction principle. An AMT tweeter should also not be confused with a planar tweeter or true ribbon tweeters.Unlike a planar ribbon tweeter, the AMT's diaphragm has a bellows-like pleated shape. Using a folded sheet of polyethylene terephthalate (PET) film with metal etching, the AMT moves air sideways in a perpendicular direction. An AMT tweeter can reproduce sound up to 650 Hz and is particularly suitable for high frequencies. In high-end multi-driver speakers, the AMT tweeter is sometimes used as a midrange tweeter or in combination with horns.
How does an AMT tweeter work?
To pump air through the reed chambers, the diaphragm physically moves back and forth in a motion similar to that of an accordion being pulled in and out, albeit over a much smaller range of motion. Due to the extremely low mass of the polyethylene substrate and the significantly shorter distance it travels with each "swing" compared to a dynamic driver, the result is a dipole driver with an incredibly fast response. In a technical sense, it shares characteristics with an electrostatic driver. Order high-quality AMT tweeters from well-known brands such as Dayton Audio, Monacor, Mundorf, Dynavox and SB Acoustics at SoundImports.For the DIY'er diving deeper into the technology: each diaphragm bending moves very little air, but due to the folded structure, more air is moved than by an electrostatic or conventional cone driver with the same expanded surface area. In terms of area comparison, the functional driver area of an 8-inch (200 mm) round dynamic cone is comparable to a standard 1-inch (25 mm) wide AMT strip.
Due to its folded driver design and small motion range, the AMT behaves like a point source version of a larger driver, which naturally leads to lower sound reproduction distortion. The name "Air Motion Transformer" comes from the fact that the speed of air as it leaves the diaphragm is about five times that of the driver structure
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You should also know that Bob runs the MEMS driver without an energiser due to the size, so it isn't properly fully range. He has stated to me before about the driver in the Seraph that running without the booster rolls off the bass and low mids, but the highs output is still OK, so he's basically using a manual crossover to just use his MEMS as a tweeter, if I understand correctly (and he is right about the ability to use them without the energiser). The Seraph definitely has impressive treble, so got no reason to doubt hi that MEMs is doing something in the sound.
Thank you . That was a good lesson .
Are the AMT drivers expensive ? Or are there cheaper Chinese versions ?
Why did he decide to use the Mems instead of the electrostats ? Since Mids and lowers aren't taken care of by mems ?
Of course seraph has good clarity but why choose this unusual mems driver , since bas and dd takes care of lower + mid .
AMT drivers in IEM size are very expensive, and up until recently only oBravo offered them in their megabuck EAMT and Ra ranges (£4k and up).
Obravo are supposed to be the global patent holder for IEM sized AMTs, but as they are based in Taiwan I guess someone has reverse engineered a cheaper solution., as another brand (Goldplanar) are offering AMT now as well.
Obravo are supposed to be the global patent holder for IEM sized AMTs, but as they are based in Taiwan I guess someone has reverse engineered a cheaper solution., as another brand (Goldplanar) are offering AMT now as well.
Is there any chance that some.one reverse engineered the driver for cheap.
If the AMT drivers are so expensive how is IMR selling the Enigma so cheap ?
Maybe there are cheaper versions of the AMT driver in the market.
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