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2359glenn | studio - Page 600

post #8986 of 10818
Quote:
Originally Posted by Silent One View Post
 

Thanks for sharing, slim.a, nice contribution and photograph. What is the function of the silver disc up front, a cover or dial perhaps?

The silver painted disc is a herbie's audiolab stabilizer - it is supposed to help tame vibration. I didn't do any A/B testing for sound quality but I have found it to be somewhat effective at reducing microphonics (?). When I put the amp on top of the marble tile, anything that would touch the rack or the marble tile would be heard through the headphones. I have been more a solid state kind of guy until now...

 

I am probably going to get one of those 2 inches maple platform. My maple platforms are slightly smaller than Glenn's amplifier (as they were made for the smaller audio-gd dac19/c2 equipment) and the amp doesn't sit in a very stable manner on top of it.

 

Anyway, the amplifier is fantastic sounding with all sorts of music. And as good as it sounded with the Beyer T1s, it sounds fantastic with the HD800s which I found not so good the last time I listened to them.

post #8987 of 10818
Quote:
Originally Posted by Ultrainferno View Post
 

It's a magic stone from Patrick82's Coconut audio

 

http://www.coconut-audio.com/index.html

 

:biggrin:

 

 

Quote:
Originally Posted by Silent One View Post
 

:beerchug:

I remember that guy!

 

My favorite quote from him : "Everything in Audio is sublte and not worth it"

post #8988 of 10818
Ultra, do I need an adapter for Glenn's OTL amp?
post #8989 of 10818

I don't think Glenn's amps take a 6SJ7 tube John. I could be wrong

post #8990 of 10818
Crap, no excuse to buy tubes...
post #8991 of 10818
Thread Starter 

:dt880smile: Feeling a twang from addiction?

post #8992 of 10818
Quote:
Originally Posted by slim.a View Post
 

Hi everyone,

 

I received Glenn's OTL amplifier a few weeks ago (see picture below) and I have been enjoying it very much... so much that I didn't have time to write much lately :)

 

 

.Happy tunes everyone!

Stunning amplifier!!!

 

Quote:
Originally Posted by Ultrainferno View Post
 

It's a magic stone from Patrick82's Coconut audio

 

http://www.coconut-audio.com/index.html

 

:biggrin:

What is this? cables with food?

i can´t believe

post #8993 of 10818

I guess you have to know Patrick82 to see the humor

post #8994 of 10818

Glenn let me know today mine is ready for shipment. Really 

looking forward to it. Thanks Glenn !!!

post #8995 of 10818
Thread Starter 
Quote:
Originally Posted by rnadell View Post
 

Glenn let me know today mine is ready for shipment. Really 

looking forward to it. Thanks Glenn !!!

Great! Let me me know if you need a courier. Will guarantee delivery by 31 March. :tongue_smile:

post #8996 of 10818
Quote:
Originally Posted by slim.a View Post
 

Hi everyone,

 

I received Glenn's OTL amplifier a few weeks ago (see picture below) and I have been enjoying it very much... so much that I didn't have time to write much lately :)

 

 

I posted some preliminary impressions on my blog (tweak-fi), but here is a copy of what I wrote using the ALO recabled Beyer T1s :

 

"Power tubes :

- With the two RCA 6AS7s, the sound is reminiscent of a bigger more complete LD MKIII - it is very appealing, and simple to like

- With the six RCA 6BL7s, the sound was very different : much more refined, more extended in the frequency extremes, more delicate ... but it took me some time to "get it"

 

Driver tubes (6SN7) :

- The sound with the stock 6SN7 RCA Glenn provided with the amp was neutral and dead quiet (no noticeable noise floor with my Beyer T1s)

- The sound with Sylvania 6SN7W was very nice : more refined, richer and warmer than the "stock" RCA. However, the noise floor is higher than the stock one, though once the music is playing, it goes slightly unnoticed

- The sound with the VT231 6SN7 Sylvania was fantastic : great timber, great soundstage and excellent resolution but there is a annoying buzzing on the right channel --> I hope it can disappear with burn-in

 

Rectifier :

- I personally didn't like much the sound of the 3DG4 tube (Westinghouse and Zenith). The sound was very "strong"/powerful but at the expense of the soundstage layering and spaciounsness

- The 5AW4 RCA worked better, especially in the soundstage department

 

I wrote those impressions after listening for only a few hours. I will post some more detailed impressions/review later on.

But the more I have listened to this amp, the more I came to appreciate what Glenn has done. It is a dynamic, fast, accurate and "rich sounding" amplifier. I was fearing that a tube amp might be too warm or not enough detailed, but the resolution of Glenn's amplifier is as good or better than anything I have had the pleasure to listen to."

 

 

Since then, I acquire the HD800s and they worked perfectly with the amplifier.

 

I am wondering about a few things though :
- Can one use six 6SN7s on the amplifier instead of six 6BL7s?
- Would the gain of 6SN7s be higher or lower than that of the 6BL7s (in the output stage)?
- Has anyone tried anything than the 3DG4/5AW4s as rectifiers for Glenn OTL amps?
- I looked around for "modern" 6SN7s to try - and I came across the Sophia ones. Did any one try that brand? Is it really low noise?
 
I will write a detailed review of Glenn's amplifier in the coming weeks as I get a better hold/understanding on the sound with both the Beyer T1s and HD800s. 
 
Happy tunes everyone!

 

 

Thanks for the nice review

 

I think using 6SN7s as outputs is OK as long as you are using hi impedance

headphones like the HD800.

I don't really remember how they sounded in Stavros amp. Once he put in

The 6BL7s it sounded so good that he never put the 6SN7s back in.

Of corse his amp can use 8 of them and get lower impedance then yours

Also I think you can use lower cost 6SN7s for the output even Sovteck will work

The good sound comes from the driver.

 

post #8997 of 10818
Quote:
Originally Posted by Silent One View Post
 

Great! Let me me know if you need a courier. Will guarantee delivery by 31 March. :tongue_smile:

No Insurance !!!!!

post #8998 of 10818
Thread Starter 
Quote:
Originally Posted by rnadell View Post
 

No Insurance !!!!!

OH... it'd be insured while in my possession... and arrive in 2 days... fully burned-in. :wink:

post #8999 of 10818
Quote:
Originally Posted by rnadell View Post
 

No Insurance !!!!!


You don't trust USPS.

I am boxing up your amp as we speak using foam tubes as usual.

I will use insurance I really don't trust them.

post #9000 of 10818
Thread Starter 

I trusted them better when they were better staffed; less financial stress. 

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