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post #1126 of 1958
1/26/13 at 4:42am
Using headphones / IEMs with a non flat impedance curve, like the UE Triple Fi 10, will show high output impedance issues in the Frequency Response graph. The next step is to measure the output impedance directly.

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post #1127 of 1958
1/26/13 at 4:48am
Quote:
Originally Posted by suicidal_orange View Post

Yeah I don't want to do that which is why I was going to do my C3 first and get it to match these results http://www.markuskraus.com/RMAA/ColorflyC3/data.htm, I have a pair of TF10s.  If it takes me all week I will do this, I'm one of those people!

Does it matter which headphones I use?  Ideally I'd use the recommended Porta Pros but I don't have a pair.

See that's the problem, I've actually seen two graphs floating around for Colorfly C3 and they're both different. There's the one you found and this one. http://www.soomal.com/doc/20100002631.htm (scroll down)

If I had to pick I hear the second graph flat not the first you linked. I don't hear any bass-roll off with C3. That graph you linked first is closer to CK4+ roll off which is terrible and certainly audible to me..
Edited by H20Fidelity - 1/26/13 at 5:07am
post #1128 of 1958
1/26/13 at 4:48am

Looks like the C3 has some rolloff issues...at least with sensitive IEM's (which are handled very well by the "mainstream" Clip+)


Edited by Achmedisdead - 1/26/13 at 4:50am
post #1129 of 1958
1/26/13 at 4:51am
Quote:
Originally Posted by Achmedisdead View Post

Looks like the C3 has some rolloff issues...at least with sensitive IEM's (which are handled very well by the "mainstream" Clip+)

No, read the link, there's two graphs for C3. I;ve found two different charts.
post #1130 of 1958
1/26/13 at 4:56am
Quote:
Originally Posted by suicidal_orange View Post

Skamp I have windows and RMAA installed, but my LAN isn't working and windows 7 has failed to install drivers for my onboard gpu so I'm waiting on a big download on my netbook (400mb for a graphics driver?!) so I can see all of RMAA.  I remember why I left for Linux!

What could HiFlight have done wrong?  I know I made a new 16 bit wav with a sine wave in it and put it on the Tera and it just sat there with the "hd light" on constantly.  I have no idea why.

That is exactly what my Tera did with a loaded .wav sinewave. I didn't make a mistake, I recorded the file just as I record ripped music. I tried both individual files and then a folder with multiple files. Blue light stayed on constantly, just like with an empty SD card. I will try creating a sinewave from my signal generator and feeding it to my digital recorder with it set to record in .wav. Maybe that will then play. We'll see.....
post #1131 of 1958
1/26/13 at 4:57am
Quote:
Originally Posted by H20Fidelity View Post


No, read the link, there's two graphs for C3. I;ve found two different charts.

I did read it, and that's why I edited in "at least with sensitive IEM's" because the Markus Kraus link specifies testing with Triple Fi 10,  and the link you posted doesn't seem to say what they tested with.

post #1132 of 1958
1/26/13 at 4:58am
Quote:
Originally Posted by Achmedisdead View Post

I did read it, and that's why I edited in "at least with sensitive IEM's" because the Markus Kraus link specifies testing with Triple Fi 10,  and the link you posted doesn't seem to say what they tested with.

That's the only thing I can think of at such time as well.
post #1133 of 1958
1/26/13 at 5:04am

Well I've generated the files from RMAA and can confirm that they play just fine on the TP.  Seems both me and HiFlight are incapable of making proper .wav files blink.gif

 

The files aren't that long in play time so I think I'll try with ED8, TF10 and AH-D5000 - I can't stand my Grados out of the TP (too bright) and the K340 barely move biggrin.gif

 

I'm off to find some lunch but will resume shortly...

post #1134 of 1958
1/26/13 at 5:15am
It looks like the soomal.com measurements weren't loaded. Both loaded and unloaded measurements are interesting.
post #1135 of 1958
1/26/13 at 7:12am

I agree. I also linked the soomal test the other day. that one is likely not under load. Looking at the markuskraus graph, I'd suspect the output impedance is lower than I expected at below 2 ohms but with too small an output coupling cap. Could be something else in circuit limiting the bass but if it's a coupling cap and you want it corrected, something this easy to open would be simple to mod. Personally I don't think it's a big issue being a couple db down at 30 hz with a 32 ohm load but good to know. Those graphs are rather expanded for clarity and will make the roll off look more severe. There is more to sound than measurements. Look at dx100 fw changes that all measure the same but 2 db down is still always 2db down. This is the c3 I'm referring to. Perhaps this should be in the other thread until the TP gets measured.


Edited by goodvibes - 1/26/13 at 7:19am
post #1136 of 1958
1/26/13 at 8:46am

I have to call it a failure for today - I can't get anything like the alleged unloaded C3 results, or those with the C3 and TF10. Will try again in the morning, hangover permitting, but not sure what I'm doing wrong.  It's so easy... frown.gif

post #1137 of 1958
1/26/13 at 11:00am

The sine wave must be a stereo wav, Tera does play stereo only.

 

Eager to see what you find out,

 

Charles  :) 

post #1138 of 1958
1/26/13 at 2:19pm
Quote:
Originally Posted by Chucky View Post

The sine wave must be a stereo wav, Tera does play stereo only.

Eager to see what you find out,

Charles  smily_headphones1.gif 

Ahh! Thanks Charles! I should have tried that! As always, there seems to be a simple solution to a supposedly complex problem.
post #1139 of 1958
1/26/13 at 5:19pm
Quote:
Originally Posted by Chucky View Post

The sine wave must be a stereo wav, Tera does play stereo only.

Eager to see what you find out,

Charles  smily_headphones1.gif 
good to see you back Charles.
post #1140 of 1958
1/26/13 at 11:22pm
Quote:
Originally Posted by suicidal_orange View Post

Yeah I don't want to do that which is why I was going to do my C3 first and get it to match these results http://www.markuskraus.com/RMAA/ColorflyC3/data.htm, I have a pair of TF10s.  If it takes me all week I will do this, I'm one of those people!

 

Does it matter which headphones I use?  Ideally I'd use the recommended Porta Pros but I don't have a pair.

Quote:
Originally Posted by H20Fidelity View Post

See that's the problem, I've actually seen two graphs floating around for Colorfly C3 and they're both different. There's the one you found and this one. http://www.soomal.com/doc/20100002631.htm (scroll down)

If I had to pick I hear the second graph flat not the first you linked. I don't hear any bass-roll off with C3. That graph you linked first is closer to CK4+ roll off which is terrible and certainly audible to me..
Quote:
Originally Posted by skamp View Post

It looks like the soomal.com measurements weren't loaded. Both loaded and unloaded measurements are interesting.

 

Bad_Robot's (Markus Kraus') post on the German HiFi Forum contains both loaded and unloaded measurements for the C3 (scroll down to the middle of the page. Warning: Google Translate).

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