Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio
New Posts  All Forums:Forum Nav:

2359glenn | studio - Page 352

post #5266 of 11018
Just remove the bottom plate remove the feet with the #6 screws and drill the holes out to what ever size you need
post #5267 of 11018
Quote:
Originally Posted by 2359glenn View Post

Just remove the bottom plate remove the feet with the #6 screws and drill the holes out to what ever size you need

Hi Glenn i was wondering what would you consider is the fattest and warmest sounding amp you have built? Or what tube combo would you recommend for that kind of a sound? I use WA2 but would like sightly more in the lower register and more detail. Is this possible? 

post #5268 of 11018
Quote:
Originally Posted by Clayton SF View Post
 

Can this amp have taps for speakers as well? So that I can connect my Zu Omens to it? :)

Clayton

 I did listen to the Druid today at the RMAF. While they were good they seem to be a bit picky to the room characteristics. I was especially impressed by the Submission $4k subwoofer. The deepness and cleanest of tone for a subwoofer I heard to date.

post #5269 of 11018
Quote:
Originally Posted by 2359glenn View Post


No the C3g is a pentode and the 6SN7 is a dual triode. I can make the amp use 6SN7s would
prefer the C3g though.

I think I need to start looking for C3g tubes now and build up my inventory. Any recommendation?
post #5270 of 11018

C3g is not a "rollable" tube.  Every single one of them came from the same Siemens factory in Germany.  They show up with a few other German brand names, like Telefunken and Valvo but they are all the same tube from the same factory.  It was a specialized tube for the German telecom industry and was not in widespread use.  So all you need is a primary use pair and a single backup pair in case something bad happens.  These tubes are designed to give a minimum lifespan of 10,000 hours, and they are known to last for twice that long or longer in use.  A single pair of C3g will last for many years.  An impressive tube in many ways.

post #5271 of 11018
thanks, just found that out on google too. i guess i need to get few pairs before the price go up. anyone removed the metal shield?
post #5272 of 11018
Thread Starter 

Siemens's rep is what initially drew me to the Yamamoto A-09S 'cause it uses the C3m to complement the 300Bs.

post #5273 of 11018
Quote:
Originally Posted by jc9394 View Post

thanks, just found that out on google too. i guess i need to get few pairs before the price go up. anyone removed the metal shield?


I have.  There seems to be no ill effects from doing so.  It's a pretty tube by pentode standards but it doesn't put on much of a light show.  If anything happens to the ones unshielded I probably won't bother next time.

post #5274 of 11018
Quote:
Originally Posted by Silent One View Post
 

Siemens's rep is what initially drew me to the Yamamoto A-09S 'cause it uses the C3m to complement the 300Bs.

 

In many ways these were the culmination of tube knowledge and engineering.  The telecom office that handled atlantic ocean transmission gave tube engineers an absurdly demanding list of specifications for their dream tube to perform this function and the industry responded with the best it could produce.  It's no surprise it functions well as an audio signal tube given the low distortion and excellent electrical properties.

 

I think Yamamoto might really have the right idea for the tube too.  They can make 1.5 watts entirely on their own and have good gain, when you really think about it there wasn't really even a need for the 45 tube in my amp (which is only good for about the same amount of power)........ it could have been single gain stage design.  But, I think you need to run the C3g or C3m in pentode mode to do it like this.  Supposedly their distortion is even lower when used as a pentode, but Glenn says triode is the way to go for tubes and I trust his experience.

 

The 45's distortion is almost unmeasurable, so I suppose there is little lost and definitely something gained, even if mostly psychological, from having the amp based around one of the oldest direct heated triodes in existence.  I'm absolutely thrilled with the performance of my amp, it has been breaking in very nicely and sounds like it could take on any comers at this point.

post #5275 of 11018
Thread Starter 
Quote:
Originally Posted by Xcalibur255 View Post
 
 
Warning: Spoiler! (Click to show)

In many ways these were the culmination of tube knowledge and engineering.  The telecom office that handled atlantic ocean transmission gave tube engineers an absurdly demanding list of specifications for their dream tube to perform this function and the industry responded with the best it could produce.  It's no surprise it functions well as an audio signal tube given the low distortion and excellent electrical properties.

 

I think Yamamoto might really have the right idea for the tube too.  They can make 1.5 watts entirely on their own and have good gain, when you really think about it there wasn't really even a need for the 45 tube in my amp (which is only good for about the same amount of power)........ it could have been single gain stage design.  But, I think you need to run the C3g or C3m in pentode mode to do it like this.  Supposedly their distortion is even lower when used as a pentode, but Glenn says triode is the way to go for tubes and I trust his experience.

 

The 45's distortion is almost unmeasurable, so I suppose there is little lost and definitely something gained, even if mostly psychological, from having the amp based around one of the oldest direct heated triodes in existence.  I'm absolutely thrilled with the performance of my amp, it has been breaking in very nicely and sounds like it could take on any comers at this point.

 

 

Looking back, it would have been neat for Glenn to have worked on both at the same time to reduce costs and improve efficiency like the three of us considered at one time. But of course, yours first in tandem. :rolleyes: :D 

post #5276 of 11018

Would really appreciate if someone could tell me the signature of the amp(s).

Lushness, bas impact, soundstage, imagine, detail and with what kind if headphone they pair nicely with.

Any comparison to Crack, Decware, DNA Sonett, Leben etc would be very helpful.


Edited by Sweden - 10/13/13 at 6:07am
post #5277 of 11018
I am not a man with fancy words you will have to have one of the gugs that own one to say.
Also what amp the OTL or the 300B with output transformers.
post #5278 of 11018

Glenn is a doer, not a talker.

 

Sweden I know you have the HD800 in mind, I don't know if anybody has tried them with Glenn's amps.

 

The T1 pair nicely with Glenn's OTLs some owners will confirm this.

 

I am pairing my GR 6SN7/LP2/5998 OTL with my Maestro GMP400 and my GR Super 10 with my K701's and I am very pleased.

post #5279 of 11018
Quote:
Originally Posted by rosgr63 View Post
 

Glenn is a doer, not a talker.

 

Sweden I know you have the HD800 in mind, I don't know if anybody has tried them with Glenn's amps.

 

The T1 pair nicely with Glenn's OTLs some owners will confirm this.

 

I am pairing my GR 6SN7/LP2/5998 OTL with my Maestro GMP400 and my GR Super 10 with my K701's and I am very pleased.

 

 

Confirmed. I love the combo. I liked the Crack alright, but Glenn's amp is just better.

post #5280 of 11018

If you want a amp for the HD-800 it would be the OTL

I have the HD-650 and Hd-800 and there is no amp that sounds better with these head pones

then this OTL and the fact that it will take 6336 as well as the 6AS7 makes it able to drive many headphones.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio