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Tyll Hertsens
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Electrostatic Headphone Measurement Program
The KGSSSRE (Kevin Gilmore Solid State Special Reviewers Edition) amplifier is here and running well!

Woot!

Let's start getting some headphones measured. But first, I need to lay down some ground rules so I don't end up buried in headphones and end up hanging on to them for too long.

I've asked Ultrabike to manage this project, please allow him to coordinate the headphone selections and shipment timing for the project.

Headphones shipped should be in good working order. Pads with low wear are preferable as getting a seal with the old Stax headphones can be quite difficult even with good pads.

I understand models have changed over the years; I have no problem measuring samples over time for particular models. I would like to do so only when it's know to be needed, however. Stax has been making headphones for a lot of years and I'm not capable of testing every model for every year produced. There will probably be some experts along shortly, I defer to your wisdom. Please lend Ultrabike a hand when needed.

I will be able to measure about 2 headphones per week without interfering with my other measurement work. If it looks like we can do more, I'll let you know.

Participants will have to pay shipping to me; I will pay and insure return shipments. I can only accept shipments from within the U.S. as I can only return ship to U.S. addresses. I will give Ultrabike my address info and he will send it to you when your turn comes.

Please be sure to include inside the box a piece of paper with the make and model; serial number; year produced (or best estimate); your name; Head-fi handle; telephone number; email addy; and return shipping address.

I will return a hard copy of the measurements in the box with the headphones.

Alllllrighty then, let's get some cans measured!

Tyll Hertsens
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Tyll's Schedule
.On vacation July 19-28.
ultrabike
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Measurements / Review participation list...

Tha list:

1) Miceblue SR-207 stock synthetic leather earpads.
2) Chinesettawong DIY headphones: 1 round, 2 oval shaped.
3) Randy Bessinger: Koss ESP-950s.
4) Mangler: SR-40/SRD-4s

ultrabike
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Status

1) Miceblue SR-207: Measurements Link
2) Chinsettawong DIY headphones: Review Link
3) Randy Bessinger ESP950: On their way home
4) Mangler SR-40/SRD-4: Messages sent

miceblue
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SR-207

Hello, I have a recent model of the SR-207 electrostatic earpspeaker that I purchased last July. I would be really interested in seeing how they measure. How does one participate in this electrostatic headphone measurement program?

This will be the stock SR-207 unit with no modifications (so it has the standard stiff synthetic leather earpads). I was interested in purchasing the real leather earpads in the future and it would be interesting to see if the earpad swap produces any changes in the frequency response (due to a better seal for example).

ultrabike
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Awesome!!!

Stats that I know seem to require very good seal.

I'll send you Tyll's address in about a week or so since I don't think he'll be able to check them out this week and weekend due to THE Show @ Newport + I need to get his address first. I bet he might be able to get to them the week after.

In the mean time, I will add you to the list.

THANKS MANG!!!

Chinsettawong
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DIY headphones

Would you test my DIY headphones? I have a pair of round and a pair of oval shape headphones that I'm very interested to see how they measure.

ultrabike
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Hey!!!
I for one would love to see some measurements on your cans. Adding Chinsettawong to tha list! Thanks!!!
DaveK1977
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Chinsettawong's DIY?

Add a vote for those. Add Koss ESP-950.

ultrabike
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ESP-950
Dave, please confirm if you would like to send your ESP-950... Not sure if you wanted to vote for them, or had some to send for the state measurement cause.
DaveK1977
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Vote

I was voting. I don't have anything quite that dear, but I'd like to see how it stacks up. I should have realized that this project didn't look like one that was riding on the shoulders of press samples but on reader volunteers. Still very curious about the DIYs.

ultrabike
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SR-207s...
on their way to Tyll. Thanks Miceblue!!!
Tyll Hertsens
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I'm back!
Thanks for taking care of the thread, Ultrabike. Ready to start taking shipments...looks like there's one on the way, right?

Chinsettawong
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DIY headphones

Could I have the address for sending headphones to, please?

ultrabike
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Yup...
Chinsettawong wrote:
Could I have the address for sending headphones to, please?
Info should have made it's way to ya...
Tyll Hertsens wrote:
Thanks for taking care of the thread, Ultrabike. Ready to start taking shipments...looks like there's one on the way, right?

Yuppers
Chinsettawong
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DIY headphones are in the box

The headphones are on their way to Tyll. Hopefully they'll arrive at Tyll's early next week.

Randy Bessinger
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Koss 950

I have a pair I would be willing to send for measurements if interested.

miceblue
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Koss ESP950 vs STAX SR-207.
Randy Bessinger wrote:

I have a pair I would be willing to send for measurements if interested.

I'd be interested in seeing how these stack up next to the entry-level STAX electrostatic headphones.

I just received the SR-207 back from Tyll and he included a printout of the measurements from that. They look very, very similar (if not better actually) to the SR-507 he previously measured, so I honestly don't understand why anyone would shell out $535 more for the SR-507.

ultrabike
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ESP-950s
Randy Bessinger wrote:

I have a pair I would be willing to send for measurements if interested.

I would be interested. Just sent PM through AVS Forums. Let me know if it made it's way to you...

miceblue wrote:
Randy Bessinger wrote:

I have a pair I would be willing to send for measurements if interested.

I'd be interested in seeing how these stack up next to the entry-level STAX electrostatic headphones.

I just received the SR-207 back from Tyll and he included a printout of the measurements from that. They look very, very similar (if not better actually) to the SR-507 he previously measured, so I honestly don't understand why anyone would shell out $535 more for the SR-507.

LOL! SR-207 seem like a great set of cans. The little amp in the bundle seems pretty practical too. I heard the combo at a meet and thought it sounded pretty good. Thanks Mike!!!

Randy Bessinger
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Will ship out today or tomorrow

To Tyll

ultrabike
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Awesome!!!
Thanks mang!
Randy Bessinger
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Koss

Sent you a PM at avs forum involving my schedule. Thx

ultrabike
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Got it...

Just relayed your message to Tyll. Thanks mang!!!

ESP950s delivered! :)

Tyll Hertsens
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Yep, got the 950...should be
Yep, got the 950...should be able to get to them tomorrow.
ultrabike
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Tyll...
Just making sure: Randy has a special, though relaxed, shipping back request (relayed thru PM) ... Cheers!
Mangler
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SR-40

I'd be happy to send an SR-40 electret your way if you're interested in measuring it.

Tyll Hertsens
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What kind of amp does it need
What kind of amp does it need. Sorry not familiar with it.
Mangler
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SR-40 Amp

I've been using it with my pro-bias electrostatic amp. From what I understand, it doesn't "care" about bias (might want to double check that with the maffia though). I also have the accompanying SRD-4; it might be fun to measure the SR-40 with both the SRD-4 and the KGSSSRE to see how they compare :)

Tyll Hertsens
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Sounds good to me. Shoot me a
Sounds good to me. Shoot me a note at tyll@tyllhertsens.com and we'll get 'er going.
ultrabike
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Info...
also sent through HF PM :)
Tyll Hertsens
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Woooops! Forgot to mention I
Woooops! Forgot to mention I'll be on vacation July 19-28. Please make sure cans arrive after that date. Sorry for the late notice.
Randy Bessinger
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Tyll,

Tyll,

Hope you had a great vacation. Ship Koss 950's back when you can.

Thanks

ultrabike
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Hey Randy
Your Koss 950's should be on their way home. Thanks mang!!!
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