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Crack;Bottlehead OTL - Page 196

post #2926 of 8083

Tried Tumgsol 7236 with both Kenrad 6SN7 and GE 8514 and it's nice with 8514 but treble are rolled off with Kenrad but too much treble if you replace Kenrad with Mullard E80CC

post #2927 of 8083

Can I play?!!

I have a Crack with Speedball upgrade and other up'd parts.  I've ran through the following 12AU7's and variants.

RCA cleartops

CBS Hytron 12au7

CBS Hytron 5814

5963 "Black Pearls"

Siemens 5814 triple mica

Amperex 12au7

Amperex 7316

Valvo E80CC

 

The Amperex 7316 and Valvo E80CC's are the winners there.

 

I've run some 6AS7's and 6080's also and the winner there is the Raytheon 6080Wc with the heavy carbon plates.

 

I found that once I settled on the big tube I could then listen more carefully to the little guy to pick out the good ones.  Then I rotated back to the big tubes to insure the pair was optimal.

 

I run HD650's with upgraded cable.

post #2928 of 8083
Quote:
Originally Posted by ALL212 View Post
 

Can I play?!!

I have a Crack with Speedball upgrade and other up'd parts.  I've ran through the following 12AU7's and variants.

RCA cleartops

CBS Hytron 12au7

CBS Hytron 5814

5963 "Black Pearls"

Siemens 5814 triple mica

Amperex 12au7

Amperex 7316

Valvo E80CC

 

The Amperex 7316 and Valvo E80CC's are the winners there.

 

I've run some 6AS7's and 6080's also and the winner there is the Raytheon 6080Wc with the heavy carbon plates.

 

I found that once I settled on the big tube I could then listen more carefully to the little guy to pick out the good ones.  Then I rotated back to the big tubes to insure the pair was optimal.

 

I run HD650's with upgraded cable.

Outstanding first post! Let me be the first to say, welcome to Head-Fi, sorry about your wallet!

post #2929 of 8083

Thanks!  And ya...that wallet thing hurts!!  I had most of the 12's from a prior and current preamp but the 6a's were all a new experience.  Just picked up a 5998 from the 'bay.  Very excited to get that in and see if there really is magic in that tube.

post #2930 of 8083

Thinking about selling the Crack amp w/ speedball to fund the SEX kit so that it could power both my speakers (emotiva) and my headphones........

 

Any thoughts?

post #2931 of 8083
How sensitive are your speakers?
post #2932 of 8083

Not quite sure...

http://shop.emotiva.com/products/airmotiv4

 

Can't seem to find it...

 

I should also note that I also have the Dayton budget speakers for my Keyboard*


Edited by younglee200 - 10/15/13 at 6:54pm
post #2933 of 8083
Quote:
Originally Posted by younglee200 View Post
 

Thinking about selling the Crack amp w/ speedball to fund the SEX kit so that it could power both my speakers (emotiva) and my headphones........

 

Any thoughts?

 

Great looking speakers! Only thing is they're active (self -amplified) so no S.E.X. required. My recommendation would be to keep the Crack for your HPs and buy the Emotiva speakers. You'll have to sort out your source switching then which is the problem I currently face - 1 output, but needing 2 (switchable) inputs for HP amps on one hand and active speakers on the other.

post #2934 of 8083

Thanks for the advice,

 

I wasn't sure whether it would benefit the speakers to have the SEX as a preamp or something, even though they are still active speakers.

 

I have an Audio GD 3.3 as my source which just lets me switch between outputs at a push of a button, so that's not too much of a hassle :)

 

I'm going to be trying to my phone as a remote with the raspberry fi too so that should be cool.


Edited by younglee200 - 10/15/13 at 7:13pm
post #2935 of 8083
Quote:
Originally Posted by younglee200 View Post
 

Thanks for the advice,

 

I wasn't sure whether it would benefit the speakers to have the SEX as a preamp or something, even though they are still active speakers.

 

I have an Audio GD 3.3 as my source which just lets me switch between outputs at a push of a button, so that's not too much of a hassle :)

 

I'm going to be trying to my phone as a remote with the raspberry fi too so that should be cool.

 

In my experience, the S.E.X. isn't quiet enough to act as a pre-amp for actives and you hear a lot of hum. It's no issue with headphones, but the actives amplify the hum along with the rest of the signal.

post #2936 of 8083
Quote:
Originally Posted by younglee200 View Post
 

Not quite sure...

http://shop.emotiva.com/products/airmotiv4

 

Can't seem to find it...

 

I should also note that I also have the Dayton budget speakers for my Keyboard*

 

You could buy yourself a Bottlehead Quickie preamp. Quiet (battery powered) and fun to build !

post #2937 of 8083
I'll be receiving one soon to use with active speakers. I'll post full details on the Bottlehead Comparison thread
post #2938 of 8083
Quick question is 274b tube compatible with the Crack?
post #2939 of 8083

It would seem like it is not.

Refer to this thread for compatible tubes http://www.bottlehead.com/smf/index.php/topic,663.0.html

post #2940 of 8083

On the Bottlehead site, it says it would be possible to modify the crack to run off of 6922 tubes, has anyone tried and is there a guide to convert from 12AU7 to 6922?

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