Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › Headamp Blue Hawaii Special Edition
New Posts  All Forums:Forum Nav:

Headamp Blue Hawaii Special Edition - Page 322

post #4816 of 5727

Thanks again David and Phil!

I will try the tubes with my 007t and 009s and see what happens and rebias somehow if I think I need it.

post #4817 of 5727
The best advice I can give you rgs9200m, is order the BHSE and when you have it, sell your Stax amp.
Then if you'll be using the 009's with the BHSE, get the Psvane EL34PH tubes.
post #4818 of 5727
If the tubes are within the same spec as the tubes original to the Stax it is unlikely that you will need to do anything. It gets tricky when you sub in different tubes that might "seem" identical - here you are effectively making electrical changes to the amp, which I would guess is not the best idea. But keep in mind when you make adjustments to the amp, you are not actually "biasing the tubes". All you can do, without changing the circuit, is adjust the balance and offset so that they are within acceptable limits. Sometimes an amp is and sometimes it isn't. If it isn't, you will normally get some noise, but not always. The only way to check is with a volt meter, and the process has been set out in these threads numerous times.
post #4819 of 5727

Thanks George. So would the RCA clear top  6FQ7 , 6CG7 tubes I see at Tube Depot be the same spec as the stock Stax tubes?

(Stax recommended these to me on the phone.)

 

tubedepot.com/products/6cg7-6fq7-rca-clear-top

post #4820 of 5727
post #4821 of 5727
Quote:
Originally Posted by rgs9200m View Post

Thanks George. So would the RCA clear top  6FQ7 , 6CG7 tubes I see at Tube Depot be the same spec as the stock Stax tubes?



(Stax recommended these to me on the phone.)



 



tubedepot.com/products/6cg7-6fq7-rca-clear-top


 



I am unfortunately of no help in that department.
post #4822 of 5727

I collected some information about tube amplifier bias adjustment in a post on the Norwegian forum Hifisentralen: "Biasjustering av rørforsterkere for elektrostathodetelefoner" including links to relevant Head-Fi threads and posts and YouTube videos. Google Translate from Norwegian to English: "Biasjustering of tube amplifiers for electrostatic headphones" (see post #359).

 

Head-Fi.org:

 

 

YouTube:

 

 

 

 

post #4823 of 5727

Good stuff. Thanks for all the help.

I like my 009s a lot but I've done a lot to perfect my stable of dynamics I like with my pinnacle amp, so I just get by with my 007t/ii when I am in the mood to 

have my 009s tell it like it is (and I hope I can handle the truth when I listen to them).

(Like I said sometime earlier, I think the PSvane tube is the pick of the litter for the Pinnacle.)


Edited by rgs9200m - 3/24/14 at 5:01pm
post #4824 of 5727

If you're aiming to keep the 007/t, I read somewhere that Justin can do an upgrade which is much more significant than any tube swap. 

I don't know how much this would cost or, considering his BHSE batch work, how long it would take.

post #4825 of 5727

Thanks for that. I just hate to bother Justin with something small because he seems overwhelmed with work.

post #4826 of 5727
Quote:
Originally Posted by rgs9200m View Post
 

Thanks for that. I just hate to bother Justin with something small because he seems overwhelmed with work.

 

The mod has also been detailed online so you could probably do it yourself as well

post #4827 of 5727
Quote:
Originally Posted by Rico613 View Post

I like a 15' length on my headphone cables, so I got the Stax extension for the 009s

Wouldn't do that -- you're degrading the sound and possibly negating the benefits of better cables upstream.
post #4828 of 5727
Quote:
Originally Posted by Surge74 View Post


Wouldn't do that -- you're degrading the sound and possibly negating the benefits of better cables upstream.

This is an incorrect and misleading statement. Stax manufactures extension cables for a reason

post #4829 of 5727
Total agreement; I use the Stax SRE-925S (5 Meter) matching extension cable with my 009's and BHSE and there is zero difference in sound quality as compared to plugging the phones straight in.

And I get the added benefit of being able to chill on the couch while listening!
post #4830 of 5727
Quote:
Originally Posted by NoPants View Post

This is an incorrect and misleading statement. Stax manufactures extension cables for a reason

Really? You really think extension cables don't degrade the sound quality because they are made by Stax?!

Every time you increase the length and even more troubling, add another connection you are degrading the sound quality. Especially with an analog amplified signal.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: High-end Audio Forum
Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › Headamp Blue Hawaii Special Edition