Skip to content
View in the app

A better way to browse. Learn more.

www.Head-Case.org

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

The Headcase Stax thread

Featured Replies

oh sorry, too latin. Expendable me thnk, which is latin too :palm: any Saxon equivalent?

  • Replies 14.4k
  • Views 3.3m
  • Created
  • Last Reply

Top Posters In This Topic

Most Popular Posts

  • bwck2000
    bwck2000

    Arrived yesterday and it really opens up every electrostatic headphone that I own. I was looking for an amp that can bring more bass out of my HE90 than HEV90 so I drained my pocket to bid on this and

  • I have been getting back at this..working up to a limited run of these as the STAX SR-X9000 and Audeze CRBN have made that need to happen. But the chassis is extraordinarily expensive and difficult to

  • Isn't everybody glad that I'm crazy enough to buy this stuff and have Kevin rip it apart?   

Posted Images

Don't you remember the recent Stallone movie?

New-TV-Spot-For-The-Expendables--Awesome.jpg

The Prescindibles

Yup. I'm crazy but not that crazy... :) Some of the amps are just missing the lead wires (but the mounting studs are in place on the transformer) so it is just a matter of adding the correct colors. Some of the amps do have the windings cut inside the protective plastic and that can be a pain to repair.

Cheers, thanks.

I heard some Stax today, ELS...

Interesting, didn't put any metal on though.

Went to faust's place? :)

And anyone think buying a Koss ESP6A would be a good idea? Kinda need a beater pair to test my future 'stat amps anyway.

Hahaha, prescindible actually seems like it could be an actual word. Man, kids these days, "I'll go off and google," sheesh, what happened to wasting 10 minutes of life flipping through a 12 pound slab of dictionary trying to find a non-word?

HE60 and HE90 sound really good too, but very different from HD6x0. It's sometimes kind of puzzling to think they're made by the same company, plus the HD800 too. HE60's fast and clean sound can be intoxicating, while the HE90's larger than life sound can be very pleasurably addictive.

I have an old Airbow SR-SC1 that would do for testing amps with, if only I actually knew something about testing amps.

Hahaha, prescindible actually seems like it could be an actual word. Man, kids these days, "I'll go off and google," sheesh, what happened to wasting 10 minutes of life flipping through a 12 pound slab of dictionary trying to find a non-word?

HE60 and HE90 sound really good too, but very different from HD6x0. It's sometimes kind of puzzling to think they're made by the same company, plus the HD800 too. HE60's fast and clean sound can be intoxicating, while the HE90's larger than life sound can be very pleasurably addictive.

I have an old Airbow SR-SC1 that would do for testing amps with, if only I actually knew something about testing amps.

LOLz, I happen to use on Chrome the orthographic corrector, so when I use a "too latin" word it complains, then I need to choose a more Saxon option. It complained with prescindible, then I googled to find it's actually an English word with the same meaning :o Then I decided to leave it hehehehe :indra:

I haven't listened to the HE-60 or 90, but I suppose they have more virtues than flaws and quite possible none of the flaws is a deal breaker, which IMHO is one of the virtues of Sennheiser.

The HE-60 is also, without a doubt, the most comfortable headphone ever conceived. That has to count for something.

Yep, Espanol pronunciation Preh sin di bleh makes better sense than Ingles.

Yep, HE60 and HE90 have many virtues and few flaws. But, compared to well-driven O2mk1 or O2mk2 (by Blue Hawaii or somesuch amp), those seemingly few flaws suddenly become glaring. Even HE90+Aristaeus, as sublime as it can be, becomes flawed. If you have and like O2, I suggest focusing upon la amplificaci

hehehe, Spanish (in Spain not Center and South America) pronunciation is more like pres-thin-dee-bleh, though in many areas of the south and Canary Islands they would pronounce it as you said.

Completely agree, it's easier spotting flaws on something when you have a high quality reference than when you're left on your own. Very few people have an innate idea on how things should sound. I have yet to try the O2 on a high quality amp. My only decent Stax amp is the 717 and it's now in the UK awaiting some parts to be repaired :( One of these days I might try a KGSSHV, BH or anything in that range. A matter of patience I guess...

Yep, HE60 and HE90 have many virtues and few flaws. But, compared to well-driven O2mk1 or O2mk2 (by Blue Hawaii or somesuch amp), those seemingly few flaws suddenly become glaring. Even HE90+Aristaeus, as sublime as it can be, becomes flawed. If you have and like O2, I suggest focusing upon la amplificaci
Yep, Espanol pronunciation Preh sin di bleh makes better sense than Ingles.

Yep, HE60 and HE90 have many virtues and few flaws. But, compared to well-driven O2mk1 or O2mk2 (by Blue Hawaii or somesuch amp), those seemingly few flaws suddenly become glaring. Even HE90+Aristaeus, as sublime as it can be, becomes flawed. If you have and like O2, I suggest focusing upon la amplificaci

Hi everyone, I just bought a normal bias SRD-7 modified into pro bias. It sounds a bit strange through the Lambda. The sound is a seemingly out of phase and clipped on the highest frequency. Tried different amps, and the results are similar. The mod board has a head-case logo on it and labeled Mjolnir Audio.

I suspect it was wired and soldered incorrectly by the previous owner :palm: as it is not wired according to the color code for the R-channel input. Here is the picture of the insides:

5249831799_4fd6f81375.jpg

Could anybody who has experience with this board confirm if it is indeed wired incorrectly?

Many thanks in advance.

I am sure Thor's hammer will fall on this, one way or another.

Be wary of that Mjolnir Audio, very sketchy outfit that one is ^-^

I believe the board was installed into the case by the previous owner, not by Mjolnir Audio. We shall see...

Amen brother!!! :) I can safely say that ECC99's in a SRM-T1 do not make it good enough for the SR-007 but it was a lot of fun to feed it low input and crank the volume. A regular T1 would not have liked that...

I had some fun trying 6SN7-GTB and Treasure CV171 in the SRM-T1W, although there was also worry about the amp blowing up. But hey, if I'm brave enough to operate an SP ES1...

The HE60 and HE90 really sound great, I like them a lot. But with more and more time listening to the O2 (over three years now, and over one year with the BHSE) I'm more and more easily annoyed by their "flaws" in comparison and can't seem to listen to the Senns for extended periods of time. It's sad.

When does the DIY T2 arrive? :indra:

I intelligently stayed away from that craziness, I'm so happy. :D

Hi everyone, I just bought a normal bias SRD-7 modified into pro bias. It sounds a bit strange through the Lambda. The sound is a seemingly out of phase and clipped on the highest frequency. Tried different amps, and the results are similar. The mod board has a head-case logo on it and labeled Mjolnir Audio.

I suspect it was wired and soldered incorrectly by the previous owner :palm: as it is not wired according to the color code for the R-channel input. Here is the picture of the insides:

5249831799_4fd6f81375.jpg

Could anybody who has experience with this board confirm if it is indeed wired incorrectly?

Many thanks in advance.

That's not one done by me. I designed those boards and that loop through setup works with only one version of the SRD-7's so I dropped it on later versions of the boards. My advice would be to move the wires so that the colors are correct or clean up the over all wiring inside the box and connect the transformers directly to the binding posts on the back of the unit. This would remove the switching setup and the umbilical but also results in a purer signal path where signal and power lines aren't mixed together. That's what I do to all the unit's I've modded plus installing better binding posts on the back.

I had some fun trying 6SN7-GTB and Treasure CV171 in the SRM-T1W, although there was also worry about the amp blowing up. But hey, if I'm brave enough to operate an SP ES1...

The 6SN7 and 6CG7 are the same so no issues with swapping them. The ECC99 is more like the ECC83 and similar variations.

The HE60 and HE90 really sound great, I like them a lot. But with more and more time listening to the O2 (over three years now, and over one year with the BHSE) I'm more and more easily annoyed by their "flaws" in comparison and can't seem to listen to the Senns for extended periods of time. It's sad.

Welcome to my world.

hi glacier, it was already a long time, but as far as I can remember it is because the input wire is switched, from the table on the left, black and red input wire is R+ and R- respectively, thus the yellow transformer input is wired to black and vice versa, I really don't remember why I did it, but easy way to test if the wiring is out of phase is to switch the wiring form the speaker output,

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Important Information

By using this site, you agree to our Terms of Use.

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.