[customcoco]

   
Off-topic, but I'm just reading an article that made me think of this. Especially this bit:
 
 
http://www.innerfidelity.com/content/musings-headphone-amplifier-output-impedance
 
This confirms my thoughts on the HD800, that it loves very-low output impedance amps to get the most driver control. If I were you I'd be using the lowest output impedance mode on the amp and bumping the LF up a bit with a good EQ.

It's funny though, the amp Sennheiser has released (named HDVD 800, if I'm not mistaken) has a 40-ish ohm output impedance

 

 

[00940]

@customcoco: on your parafeed amp, the high gain position has a +/- 58r output impedance and the low gain position about 10r. Time to test

 

[customcoco]

  @customcoco: on your parafeed amp, the high gain position has a +/- 58r output impedance and the low gain position about 10r. Time to test

Indeed, we'll see. I'll try to get some A/B'ing done tonight.

 

[HiGHFLYiN9]

 
LGK 1.0 from GR Research. Uses a proprietary 3 inch (!) driver, along with a baffle compensation network. Flat packs are available from SubAssemble. I have no affiliation with either company. Nice resolving treble and surprising bass response out of these little guys. I used Duratex coating to get that cool texture. 

 

[Drsparis]

Just completed a headband for a pair of Grados, Wasn't sure what I was doing built it ended up looking soo much better than expected!

 

[mwhouston]

Take a look at my genuine America Oak wood knobs on my Audio person blog.

 

[mwhouston]

Highflying: I developed a similar finish using a high quality house paint, a semi-dry roller and secretly, now well known, technique. Take look at my DIY, retro-thermionic blog spot (Google it).

 

[mwhouston]

Highflying: You have me thinking.

 

[Ocean7]

I just finished building the NP-100V12 by Rogers Gomez and I though I could share a few pics.

That's an excellent little amp as far as I can tell. And it's even cheaper to build than the SSMH.

Comments are more than welcome!

 

[BaTou069]

I just finished building the NP-100V12 by Rogers Gomez and I though I could share a few pics.

That's an excellent little amp as far as I can tell. And it's even cheaper to build than the SSMH.

Comments are more than welcome!

 

 
Maybe not a comment, but a (noob) question.. Aren't two tubes needed for Stereo? Dont untertand the logic using one tube Thanks

 

[tomb]

I just finished building the NP-100V12 by Rogers Gomez and I though I could share a few pics.


That's an excellent little amp as far as I can tell. And it's even cheaper to build than the SSMH.


Comments are more than welcome!

 

Maybe not a comment, but a (noob) question.. Aren't two tubes needed for Stereo? Dont untertand the logic using one tube Thanks

Many tubes in audio are dual triodes, meaning two circuits are contained in the same glass.

There are some of us (me) who've tested thousands of tubes and would tell you that matched output of two circuits within the same glass is the exception, not the rule. Nevertheless, some still design for one tube and are successful with it.

 

[Ocean7]

Maybe not a comment, but a (noob) question.. Aren't two tubes needed for Stereo? Dont untertand the logic using one tube Thanks

Sure you need two tubes and that's what you get with a 12AU7 It's a dual triode tube so essentially two tubes in one.

Cheers!

 

[Roberval]

 
Very nice and clean.
 
Have you tried 12AX7 instead ? In one of mine sounds a lot better.

 

[funch]

 
 
Very nice and clean.
 
Have you tried 12AX7 instead ? In one of mine sounds a lot better.

 
This is a very nice looking amp. The colors are perfect together. Classy.

 

[Ocean7]

Very nice and clean.

Have you tried 12AX7 instead ? In one of mine sounds a lot better.

Lovely little beast Roberval!

I did not try the 12AX7. Maybe one day. I have too many ongoing projects!

May I ask about your amp? What's that big cover on top? Transformer and power supply? Also what are those two things (LEDs? Outputs?) in front of the switch?