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Question about amps for the Stax SR-009 - Page 25

post #361 of 724
Quote:
Originally Posted by spritzer View Post

 

Speaking of the 007t, I just acquired one and I'm going to modify it so it's as good as it ever could be.  Think mini BHSE while looking 100% stock... redface.gif

 

 

 

Mini-BHSE? Very intrigued Birgir! popcorn.gif

post #362 of 724
Quote:
Originally Posted by tdogzthmn View Post

 

Do you find the SR-507 + SRM-600 combo to be bright or fatiguing?  I've not come across a single track in my music library where I find the the SR-507 to sound bright, thin, shrill or the like.  I hope to try the SR-009 on my amp at some point to hear how it differs from the 507.

I've never found the 507 or the 009 bright with the 600ltd, never. It was fatiguing with the 007 MK2, the top end was grainy compared to both the 507 and 009. The 007t is more 'tubey' and richer, but I wouldn't call it warmer.

post #363 of 724
Quote:
Originally Posted by kevin gilmore View Post

Without going into further details what birgir is going to do is remove the resistive plate loads

and replace them with a T2 style current source. The overall power will remain roughly the same.

Where the heat goes will not remain the same. But he is also going to change the power tubes to

6s4's because with 4 tubes, this is an easy upgrade.

 

So its going to look like the insides of an original T2 with the wing boards.

 

 

Wow! Will it be adequate for the SR-007 (especially for power requirements), or more suited for the SR-009?


Edited by antonyfirst - 8/9/13 at 5:59am
post #364 of 724

Hello everyone,

 

We will perform on 7 and 8 September, for a large range of amplifiers electrostatic, an comparative high-end enough, but less expensive that the famous Woo Wes, Cavalli Liquid Lightning and Headamp Blue Hawaii tested by the equally famous Tyll Hertsens in December 2012 http://www.innerfidelity.com/content/listening-great-headphone-amplifiers-and-stax-sr-900 also a Stax SR-009 (or rather three SR 009!)

 

This large comparative amplifiers on the Stax SR 009 wants more stringent than that achieved by Tyll because it will involve three testers (Frederic Pierre Paya and myself) (ie three different opinions) in terms of protocol tests (necks in discussion), a priori listening blind (single blind) after equalization levels amplifiers with a voltmeter.

The comparison will be done over two days (Saturday and Sunday, participants sleeping on site).

The dacs used will be very high-end: TotalDac D1; Audiomat Maestro reference, PS Audio Perfect Wav, and also audio cables. There will even be a rejuvenator current PS Audio Plant P3. The source will be dematerialized (server Aurender S10) and music tracks listened to high quality recording and most varied in styles (voice / instruments)

 

The amplifiers are the following list:

Two high-end amplifiers Stax (those of Peter, Stax dealer in France): Stax SRM-727-II and SRM 007 t-II

An American amplifier: Eddie Current Electra (the Frederick)

A German amplifier + U.S adapter : combi AudioValve RKV mark2 + Audio Woo Wee

So in total: three tube amplifiers and one amplifier solid stats, fairly upscale, price quite comparable (the French market)

 

Frederic (superfred 21) is a big fan of headsets and amplifiers: it has a large number and his favorite is the Stax SR-009: He has already had the opportunity to listen to the BHSE on the 009 and that a complete Sennheiser Orpheus system, but for him, he preferred the couple SR 009 + Electra

Pierre Paya is also a big fan of headphone: it is Stax dealer in France, this is he who sold me my 009 SR (which works perfectly).

 

The purpose of this is to find the confontation headphone amplifier giving the best sound or listening better synergy with SR 009 in this price range.

 

We will keep you informed of the results of this great confrontation amplifier in the month of September.

Otherwise, for more details, you can always go take a quick look on the french forum HCFR on Stax thread, a lot of things now say.

 

http://www.homecinema-fr.com/forum/casques-haute-fidelite/

http://www.homecinema-fr.com/forum/casques-haute-fidelite/club-des-heureux-proprietaires-de-casques-stax-t29819561-4530.html

http://www.homecinema-fr.com/forum/casques-haute-fidelite/club-des-heureux-proprietaires-de-casques-stax-t29819561-4545.html

 

 Thank you for your attention.

 

 Eric.


Edited by eric65 - 8/9/13 at 8:38am
post #365 of 724
Well done Eric! really looking forward to your findings. Being European I'm personally more interested in this comparison than one that involves American amplifiers...altough I'd obvious curious to hear the WES, the BHSE or the KGSSHV.
post #366 of 724
Quote:
Originally Posted by realmassy View Post

Now, if you'll ever think of selling it (because you don't need need another amp, do you?) just let me know :-)

 

Before my PM inbox gets any more abuse, I will only ever do one of these as a proof of concept and I'm keeping it.  redface.gif  It will be modified to run normal bias models as I need something that is a good match for the vintage Stax models. 

 

In concept this will be what the first T2 prototypes were, T1 front end driving properly loaded output tubes.  Now this front end doesn't stand any chance of driving EL34's (which Stax did) but it works just fine with the 6S4A's. 

post #367 of 724
Fair enough, please post some pictures at least! And some instructions on how to mod the amp :-)
post #368 of 724
Quote:
Originally Posted by eric65 View Post

 

 

Frederic (superfred 21) is a big fan of headsets and amplifiers: it has a large number and his favorite is the Stax SR-009: He has already had the opportunity to listen to the BHSE on the 009 and that a complete Sennheiser Orpheus system, but for him, he preferred the couple SR 009 + Electra

Interesting, I did not personally like the Electra +009 combo, very bright on HF especially on a less than ideal quality record.

 

During Seattle meet at Bottlehead Headquater I have found:

 

Round 2, the hype of Stax 009:

First of all, Kingstyle told me his Eddie Current Electra is tubed on the warm side the factory setting. Eddie Current house sound is known (to me) as neutral with very small touch of warmth. Someone may say the 009 is bright, well, yes and no. Put aside the HF, the 009 is effortless, open, (very) transparent, organic, natural, great vocal, and with great believable bass. It is hard for a pair headphones to accomplish all of these at the same time. The 009 is technically superior to Fostex TH900, LCD3/2, HD800, and 007s by a large margin, salute to Stax beerchug.gif. Now count in the HF, for pop and most rock records (often badly recorded) the exteme HFof 009 is counter productive (to me) than help. The other part of frequencies of 009 are right on, but the HF is too "aggressive", again to me, Kingstyle is fine with the HF presentation. In the Pink Floyd " the Dark side of the Moon", the opening bells in the "time" is ear piercing bright, unbearable. Same song with the warm 007 V1. was fine, but also you will lose the openness and effortlessness of 009 when use the 007 v1. I switched to Enya and norah jones, the presentation of 009 is lovely with the extreme HF kicks in from time to time, especially with Norah Johns's at the beginning of each sentence of the lyric when she try to use her female HF magic, the 009 gave me a sharp pinch that remain me I am listening to a record not a real person. Like I said other frequencies of 009 are very beautiful that included vocal and bass. I can imagine this setup is good for classical music. I really wish this is a "L" pad device can adjust HF of 009, I would be a  happy man.


Edited by Seamaster - 8/9/13 at 12:00pm
post #369 of 724
Quote:
Originally Posted by spritzer View Post

 

Before my PM inbox gets any more abuse, I will only ever do one of these as a proof of concept and I'm keeping it.  redface.gif  It will be modified to run normal bias models as I need something that is a good match for the vintage Stax models. 

 

In concept this will be what the first T2 prototypes were, T1 front end driving properly loaded output tubes.  Now this front end doesn't stand any chance of driving EL34's (which Stax did) but it works just fine with the 6S4A's. 

aww man.. I was really looking forward to owning a "Spritzer himself Built this" amp...a mini-T2 no less. Will watch out when you put out those FS ads. I'll just have to be all jelly about MH and his wonderful  spritzer KGSSHV .. triportsad.gif


Edited by sachu - 8/9/13 at 12:01pm
post #370 of 724

I dunno, I managed to get my 009s to sound un-ear-piercing on just about all rock and pop with my little old 007t amp with some diligent upstream tweaking, high volumes and all,

and now they are awesome.

I had the same work to do with my HD800s.

post #371 of 724

I never had any issues with the LL Mk2 and LL mK1. I listen at levels where I feel the music is whole. People's definitions of low volume listening varies a lot..so that's not a good term to go by. 

post #372 of 724
Quote:
Originally Posted by sachu View Post

 People's definitions of low volume listening varies a lot..so that's not a good term to go by. 

That is very ture, using Gil for example basshead.gif, he needs a pair of full size speakers on his each shoulder.

post #373 of 724
Quote:
Originally Posted by realmassy View Post

Fair enough, please post some pictures at least! And some instructions on how to mod the amp :-)

 

Those will be posted but I probably won't give out the PCB design for the wing boards.  It's just one of those projects where so many things can go wrong that I don't want to move it past the "can be done" stage. 

post #374 of 724
A few posts ago I said I was demoing a Stax 007tii, and initially I thought I preferred it to my Stax 600ltd. Well, in the end I liked the 600ltd better: it's mostly about transparency and dynamics, and I still don't think the 009s are bright.
At this point I'll try to find a modded 727, or even better I'll save up for a BHSE
post #375 of 724

So I have a KGSSHV in house and a Liquid Lightning on the way (here mid-week next week). Should be a fun comparison...more to come next week. 

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