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DIY Cable Info and Resources
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MrSpeakers Alpha Dog: A reference class Dog Introduction First, a disclaimer: I purchased the Alpha Dogs ($499USD, discontinued) with my own money after doing my own research and thus this is my...
Hi everyone, Before I start the review, I would like to thank Campfire Audio for making this awesome IEM, and also to d marc0 for inviting me in the tour. INTRODUCTION I'm an Indonesian...
For larger views of the photos (1200 x 800) - please click on the individual images INTRODUCTION This is going to be a long review – I'll get that out up front. My time with the U6 has been a...
DOI: I don't get to listen to new gear a lot so I may not be any use at answering questions about comparisons to anything other than my own stuff (which may or may not be considered esoteric). I...
Just on sound quality, meh. It's very quiet, and detailed, but on my main headphones, AKG K712, the mid-treble balance is just too bright. The bass is nice and deep and honest, and midrange is OK,...
My DIY electrostatic headphones - Page 34post #496 of 21468/25/12 at 12:45ampost #497 of 21468/25/12 at 6:18amThread Starterpost #498 of 21468/25/12 at 8:48am
Edit: Holy schinkes, I'm a page behind. Those are beautiful Amarok. Intense.
Sweat screen from an AT-707. To my understanding these are similar to AT-705, PWB electrets, SR30/40/50/etc. and I'm sure others.
Front grill of AT-707
The Sony ECR-500 and Stax SR-5 have sweat screens protected by a plastic mesh, but no fabric that I remember seeing. The more acoustically invisible the protective mesh is the more it will allow dust and dirt in hence the dust covers you see on the 707's, I'd assume.
Edited by khbaur330162 - 8/25/12 at 8:51ampost #499 of 21468/26/12 at 1:47am
To give some perspective on that picture khbaur posted above here are Stax SR-40 and SR-50 electret drivers ( same driver as AT shown above ) that do not have the silver crinkled moisture guard in place.
There is a transparent dustguard on these a thin transparent rubbery thing under enough tension it is hard to notice( can't see it in the pictures at all ) just above where the stator dips down on the driver side of that spacer ring. I measured the spacer ring seen just after the housing lip there and it seems to be no more than 1 mm thick. So the silver thing there is instead of one of these transparent things possibly or on the very top of one if you compare pictures.
Hope that shows some distances and roughly how the Stax/Audio Technica electrets are constructed. The diameter is ~57mm so how that moisture guard spacing varies with bigger driver size who knows.
Edited by nick n - 8/26/12 at 1:52ampost #500 of 21468/26/12 at 5:24amThread Starterpost #501 of 21468/26/12 at 6:30pmpost #502 of 21468/28/12 at 2:16am
Cool photos Congo!
While skimming the old ECR-500 Impressions thread I re-stumbled over this post of ericj's. Gives meaning to the wire mesh outside the ECR-500 stators.
No idea if any of this interests you guys, but it seems like it could be incorporated into your designs. For planar magnetic drivers, use flux plates whenever possible. Could the same be said for electrostatic drivers and electrostatic shielding? I've never heard of an electrostatic loudspeaker manufacturer using this technique, although I admit I'm not that informed.
Edited by khbaur330162 - 8/28/12 at 2:29ampost #503 of 21468/28/12 at 4:29ampost #504 of 21468/28/12 at 5:16amThread Starterpost #505 of 21468/28/12 at 11:23pmThread Starter
Purrin was so kind to help me make a FR measurements on my Omega clone headphones that I sent to Frank Cooter.
The sweat protection on this one is damping the lower bass somewhat.
P.S. I think the roll off isn't that bad. It's only about -5 dB from 50hZ.
Edited by chinsettawong - 8/28/12 at 11:50pmpost #506 of 21468/28/12 at 11:41pmpost #507 of 21468/28/12 at 11:46pmThread Starterpost #508 of 21468/29/12 at 5:56ampost #509 of 21468/29/12 at 7:19amThread Starterpost #510 of 21468/29/12 at 2:07pm
Here's something to compare to:
First one is CSD (different time and amplitude scale than the one above!), second is burst decay, third is distortion in % (more like distortion of my crappy microphone ) And the last one is frequency response of left and right channel with new earpads.
And a last thing (interesting maybe only for arnaud), I decided to use just calculator instead ANSYS due to "time deficiency".
My calculator results are: peaks at 4.8 + 2.4kHz, dips at following frequencies: 13.1kHz, 2.7kHz, 6.5kHz, 10.6kHz and 1.7kHz.
Except the 2.4kHz and 1.7kHz all frequencies are correct and I think that's nice result.
- My DIY electrostatic headphones
- Diy Beginners Guide
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