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Speaker amps for headphones - Page 138

post #2056 of 3116
Quote:
Originally Posted by ALRAINBOW View Post

All the best . Lmao

Cheers,

All the best, man!
Have a drink on me!
Merry Christmas to all.

Chris
post #2057 of 3116
Thanks
post #2058 of 3116
Quote:
Originally Posted by potterma View Post
 

As Al suggests, you probably need more attenuation for the HD 800's.  You probably want a separate box for the HD 800 since enough attenuation for the  HD 800 will likely result in too much attenuation for the HE-6.

 

Read back in this thread and keep an eye out for RobRob's post.  He posted a spreadsheet and circuit diagrams for various resistor networks.  The "Preferred Network" should suffice.

 

@ALRAINBOW The HE adapter is the HiFiMan speaker amp adapter box.

 

Thank for the response.

 

Where can I buy this box ?

This noise is so annoying.

 

Regards

post #2059 of 3116
Head direct or music direct.
post #2060 of 3116
Quote:
Originally Posted by robrob View Post
 

 

This is why I added the 'network bypass switch' to the Robinette Box. You can switch out the resistor network when driving low sensitivity headphones like the HE-6.

 

12 ohms for R2 and 2 ohms for R3 gives you 16dB of attenuation. What amp and headphones are you using again?

 

No I was speaking about the Robinette Box. Where I can buy it ?

post #2061 of 3116
Quote:
Originally Posted by Hun7er View Post
 

 

No I was speaking about the Robinette Box. Where I can buy it ?

The Robinette Box is do-it-yourself box.  Unless you can convince Rob to build one for you :)  Or perhaps one of the other DIY'ers here.  Try @brunk.  He's pretty willing to do things like this for folks.  

post #2062 of 3116
Quote:
Originally Posted by potterma View Post
 

The Robinette Box is do-it-yourself box.  Unless you can convince Rob to build one for you :)  Or perhaps one of the other DIY'ers here.  Try @brunk.  He's pretty willing to do things like this for folks.  

Yes, I certainly can :) Feel free to send me PM Hun7er.

 

As a side note, I have purchased an oscilloscope, the Rigol DS1052E to be exact. There is a hack to upgrade from 50MHz bandwidth to 100MHz. The sampling will remain at 1Gsa/sec sampling of course. Not too bad for $350 shipped :D  Can't wait to inspect all my gear now lol.

post #2063 of 3116

Hmmm so you paid $350 for a tiny TV that only plays squiggles?  Well, I guess that's better programming than I usually watch, but I prefer a bigger screen...

post #2064 of 3116
Quote:
Originally Posted by Gary in MD View Post
 

Hmmm so you paid $350 for a tiny TV that only plays squiggles?  Well, I guess that's better programming than I usually watch, but I prefer a bigger screen...

 

LMAO  -  That was a Gary classic!    :beyersmile:

post #2065 of 3116

@robrob

 

Quote:

Originally Posted by robrob View Post
 

 

This is why I added the 'network bypass switch' to the Robinette Box. You can switch out the resistor network when driving low sensitivity headphones like the HE-6.

 

12 ohms for R2 and 2 ohms for R3 gives you 16dB of attenuation. What amp and headphones are you using again?

 

I just this morning took the time to really study your web page at the link above.  I know it's already been said in various ways, but I, too, am very impressed with all the research you did that culminated not only with a very useful spreadsheet, but also the extremely well-documented schematic and DIY instructions for building the Robinette Box. Even I could build it, thanks to your excellent web page.  ;) 

 

Thank you, again, for all your humble, crowd-sourcing efforts to demystify the subject of resistor networks while also providing an excellent, feature-full solution.

:beerchug: 

---------

 

@brunk

Quote:
Originally Posted by brunk View Post
 

Yes, I certainly can :) Feel free to send me PM Hun7er.

 

As a side note, I have purchased an oscilloscope, the Rigol DS1052E to be exact. There is a hack to upgrade from 50MHz bandwidth to 100MHz. The sampling will remain at 1Gsa/sec sampling of course. Not too bad for $350 shipped :D  Can't wait to inspect all my gear now lol.

 

Always ready to help and such a geek!  What's not to like about you, Brunk?  

 

(Don't tell us - I'd rather not know!)

 

:beerchug:

post #2066 of 3116
Quote:
Originally Posted by brunk View Post
 

As a side note, I have purchased an oscilloscope, the Rigol DS1052E to be exact. There is a hack to upgrade from 50MHz bandwidth to 100MHz. The sampling will remain at 1Gsa/sec sampling of course. Not too bad for $350 shipped :D  Can't wait to inspect all my gear now lol.

My scope is getting old and the Rigol looks very interesting. The link I found on the bandwidth hack says newer firmware can't be downgraded to a hackable version. Is that still true?

 

Quote:
 I just this morning took the time to really study your web page at the link above. 

Thanks for the kind words zilch.

post #2067 of 3116
Quote:
Originally Posted by brunk View Post
 

Yes, I certainly can :) Feel free to send me PM Hun7er.

 

As a side note, I have purchased an oscilloscope, the Rigol DS1052E to be exact. There is a hack to upgrade from 50MHz bandwidth to 100MHz. The sampling will remain at 1Gsa/sec sampling of course. Not too bad for $350 shipped :D  Can't wait to inspect all my gear now lol.

Now the fun begins...  Enjoy that 'scope!

 

I looked at the math features.  Comes standard with FFT!  Sweet!

post #2068 of 3116

Thought you guys might find this interesting...

 

 

Note the name on the bottom...

post #2069 of 3116

Joseph Grado. Cool. His setup of 20ohms and 2ohms gives an effective speaker load of 21ohms and 21dB of attenuation.

post #2070 of 3116
This is really funny to read this , and read in Nother thread how amp,output imp is so important to the sound with headphones . And I do not mean IEM,s , real cans .

I have a mytek DAC , once DAC for the money . The headphone amp is ok not great , it came from the factory with a 20 ohm output resister in the out path. When I used it with the hd800. And the LCD,s it's fine. When I used it with a pair of jh13 and 16. It sounded horrible . I scathed my head . When I opened it up I could see the resister. When bypassed the IEM,S. Sounded much better but no cigar hear as the amp and preamp in this unit is subpar to the DAC. It's just best used with the xlr outputs. Anyway the point is the guys in the other thread are all over the output imp. It's just funny . Lol .

Ald
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