sachi
Active Member
Hoping to borrow a friend's SR-404 tonight so i can listen to it. Will post an update about sound impressions soon.
My recently finished reference headphone amplifier
- Thread starter sachi
- Start date
Hoping to borrow a friend's SR-404 tonight so i can listen to it. Will post an update about sound impressions soon.
vinny_wills
Member
Thats a wonderfull lookin amp. I'm sure you would proud owning it now.
grubyhalo
New Member
Wow! Looks really nice! :clapping:
sachi
Active Member
Thanks guys 
Oh and I am listening to the amp witha pair of Stax SR-404 Signature headphones that i borrowed from a friend. I have heard and owned the exstatas earlier, but they were both the prototype versions. And i tell you, I don't remember the amp sounding this good. The bass is now so good that it is enough to even satisfy me. Bone shaking deep and tight.
I thought i was done with stas but man, I so want to build one for myself now.
This amp was built for a friend. I think he is going to be very very pleased with the investment.
This is going to blow a few minds at the meet this Saturday, gauranteed!
Oh and I am listening to the amp witha pair of Stax SR-404 Signature headphones that i borrowed from a friend. I have heard and owned the exstatas earlier, but they were both the prototype versions. And i tell you, I don't remember the amp sounding this good. The bass is now so good that it is enough to even satisfy me. Bone shaking deep and tight.
I thought i was done with stas but man, I so want to build one for myself now.
This amp was built for a friend. I think he is going to be very very pleased with the investment.
This is going to blow a few minds at the meet this Saturday, gauranteed!
Last edited:
sachi
Active Member
Got rid of the nasty hissing pot noise... :yahoo: One last pic of the setup before the amp is shipped off later next week. 
Last edited:
sachi
Active Member
Got one of the EHHA amplifiers cased up. The other is giving me too many problems..will have to wait till i get back from India to tackle it.
Its features,
a matched pair of Valvo NOS ECC86 tubes. The tubes just poke out a tiny weeny bit (like 1mm ) on the top of the case. Case can be easily opened to switch tubes out.
Big 160VA Avel lindberg transformer
Separate transformer for the heater supplies.
12.6Volt Low drop out voltage regulator based DC heater supply for the tubes
High quality Vampire RCA jacks
Alps RK27 blue velvet potentiometer
AMB S22 dual rail supply for the High voltage section
Tube high voltage startup delay. On turn on the heaters of the tubes come up first and a few seconds later (LED indicator keeps flashing during this time to indicate that it is warming up) 20 seconds later the high voltage supply is applied to the amplifier and the S22 power supply comes on (LED stops flashing ).
Amplifier is biased deep into class A
Solid aluminium silver knob and walnut wood front panel.
Its features,
a matched pair of Valvo NOS ECC86 tubes. The tubes just poke out a tiny weeny bit (like 1mm ) on the top of the case. Case can be easily opened to switch tubes out.
Big 160VA Avel lindberg transformer
Separate transformer for the heater supplies.
12.6Volt Low drop out voltage regulator based DC heater supply for the tubes
High quality Vampire RCA jacks
Alps RK27 blue velvet potentiometer
AMB S22 dual rail supply for the High voltage section
Tube high voltage startup delay. On turn on the heaters of the tubes come up first and a few seconds later (LED indicator keeps flashing during this time to indicate that it is warming up) 20 seconds later the high voltage supply is applied to the amplifier and the S22 power supply comes on (LED stops flashing ).
Amplifier is biased deep into class A
Solid aluminium silver knob and walnut wood front panel.
sachi
Active Member
Just trying to clear off my DIY projects here in my spare time..
Another EHHA build ...just got it cased up.
An eXStata build in progress...waiting for some parts so I can finish up the input wiring.
Another EHHA build ...just got it cased up.
An eXStata build in progress...waiting for some parts so I can finish up the input wiring.
sachi
Active Member
Just got done wiring up this exstata...phew..
I am a bit nervous to throw a switch as this is the first time I am using a Digital volume control based on the PGA2320 (board and design by luvdunhill on head-fi). Going to recheck everything tomorrow morning before turning it on.
I am a bit nervous to throw a switch as this is the first time I am using a Digital volume control based on the PGA2320 (board and design by luvdunhill on head-fi). Going to recheck everything tomorrow morning before turning it on.
grubyhalo
New Member
:clapping:Fantastic work! You're my headphone posterboy! 
hyeah:
hyeah:
grubyhalo
New Member
Hey Sach,
Sorry for waking this zombie up, but could you please post your impressions of how the HD650's sound through the CTH, compared to the other amps you've built? Thanks for your time!
Sorry for waking this zombie up, but could you please post your impressions of how the HD650's sound through the CTH, compared to the other amps you've built? Thanks for your time!
GeorgeO
Well-Known Member
I spoke to Sachi in November, when I was in the US. He now has a full time job after completing his masters, so is probably now running hard in the "rat race"!
grubyhalo
New Member
Ah, too bad! Hope he's getting enough time for music...
Just checked out this old thread. Nice amps!
Wachara, a Thai DIYer is making some nice looking Electrostatic headphones
and amps -
My DIY electrostatic headphones - Head-Fi.org Community
Has anybody made an ELS headphone? - Page 28 - diyAudio
More on this thai diy site -
My DIY Projects
Wachara, a Thai DIYer is making some nice looking Electrostatic headphones
and amps -
My DIY electrostatic headphones - Head-Fi.org Community
Has anybody made an ELS headphone? - Page 28 - diyAudio
More on this thai diy site -
My DIY Projects
grubyhalo
New Member
That's fantastic. Thanks for posting it!
sachi
Active Member
Never heard the HD650 through the CTH..but i would imagine it would sound pretty good. The CTH is a stacker like amp in super mini form..it just lets you listen to the tube that is in use. alll i can say is you won't be disappointed. Howdever, the EHHA is what you want for the sennheisers and AKGs.
GeorgeO
Well-Known Member
Namskara Sachi
Good to hear from you again, do keep posting now and then. I thought you might have joined the "rat race" and be busy at work these days!
Good to hear from you again, do keep posting now and then. I thought you might have joined the "rat race" and be busy at work these days!
sachi
Active Member
namaskara george Sir
the rat race has definitely curtailed and cut into my listening time. However, am nearly moved in to my new place and in the 3rd month of my work..things are going good and hope to do some caatching up on some long listening sessions soon.
Do let me know in advance when you make your way out here next time and try to make it to portland
the rat race has definitely curtailed and cut into my listening time. However, am nearly moved in to my new place and in the 3rd month of my work..things are going good and hope to do some caatching up on some long listening sessions soon.
Do let me know in advance when you make your way out here next time and try to make it to portland
grubyhalo
New Member
Thanks for your thoughts. The EHHA looks a bit too much of an amp for my intended project. I am just looking at adding a decent headphone section to the DIY pre/phono that I'm planning for and I am not sure if I need the firepower of the EHHA, atleast at this time...
Rockfella
Active Member
Looks good!
sachi
Active Member
grubbyhalo..let me know if you are interested in a CTH. I have a previous customer of mine for whom i built one who is looking to sell it now. He has had it for a year and half..it was a boutique build. I might be able to get it for you cheap. It will ship out from Japan.
Wharfedale Linton Heritage Speakers in Walnut finish at a Special Offer Price. BUY now before the price increase.
