Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › Headphone CSD waterfall plots
New Posts  All Forums:Forum Nav:

Headphone CSD waterfall plots - Page 29

post #421 of 937

If they're K240's they are EP Sextetts.  The only mods are that I replaced the stock perforated plastic grill with speaker cloth.  Didn't seem to change much acoustically surprisingly but it's more comfy.  I don't hear ringing either, and since Ty'll measurements them not settling down quickly in the impulse response I was thinking it might be the bass that was causing that, which you seem to be hearing.  They're semi-open.  Basically they are closed headphones with cracks that let the sound out.  Purrin, you should check out the passive radiators inside.  Just be careful when you remove the pads because the radiators are delicate and the speaker cloth doesn't keep fingers out.  It's a nice bit of 70's engineering. 

post #422 of 937
Quote:
Originally Posted by purrin View Post

AKG K240 Sextett? (@rdevils can you confirm?)

Pre-measurement impressions:

 

Very intimate female vocals - heh - which probably means non-linear FR. These need quite a bit of power. Extremes are rolled off. 3-4kHz peak - if any ringing not serious. Smooth sounding. I kind of like these. Bass doesn't appear to extend low like most closed cans, but it sounds more open in nature. Some treble emphasis. Are these ported or something? Bass doesn't sound aligned - like a ported speaker where the lower bass is a little slow in arriving. It's OK though. I like these! If don't want to take them off for measurements, then I must like them.


The six diffusers in the Sextett from which it derives its name is meant to equalize the pressure in front of the baffle and prevent the midbass hump (at least that's how I interpret it). I'm guessing it's through these same diffusers that would perhaps provide a bit of an "echo" in the bass?

 

post #423 of 937
Thread Starter 

AKG K240 Sextett? (@rdevils can you confirm?)

These are not FR plots. The waterfall plots below only go down to 200Hz not 20Hz!

Closed headphones require bass compensation below ~2kHz which is not applied in these plots.

K240 L.txt.jpg K240 R.txt.jpg

 

Ouch I got this one totally wrong! I didn't think the ringing was this severe at all. I didn't hear the ringing at 12kHz and 14khz either (probably because it's hard for us to distinguish specific tones at such higher frequencies - above 10khz.) Putting the headphones back on, I think I can hear the effect, but it's not an unpleasant one. the 4kHz ringing just doesn't seem that bad. This is an odd one.


Edited by purrin - 11/2/11 at 8:02pm
post #424 of 937

eek.gif

 

So weird, I don't hear that stuff either.  Maybe the grain in the treble is caused by the ringing at 12/14khz?


Edited by rhythmdevils - 10/19/11 at 9:54pm
post #425 of 937
Thread Starter 

 

Quote:
Originally Posted by rhythmdevils View Post

Purrin, you should check out the passive radiators inside.  Just be careful when you remove the pads because the radiators are delicate and the speaker cloth doesn't keep fingers out.  It's a nice bit of 70's engineering. 


Ahhh. Is that what it is? Passive radiators have a lot of group delay. Probably what I'm hearing. It's a nice bass-reflex box effect - not really noticeable unless I directly come from another open headphone.

Quote:
Originally Posted by rhythmdevils View Post

eek.gif

 

So weird, I don't hear that stuff either.  Maybe the grain in the treble is caused by the ringing at 12/14khz?


AMUSING OBSERVATION: I have a hard time hearing ringing at 4-5kHz; or if I do hear it, it's inane. For example, while I do hear the typical Grado 5khz ringing, I am actually OK with it. It's the Grado 8-9kHz ringing that hurts me. Most people are sensitive in that area.

 

I hear zero grain - then again it's probably the Eddie Current Balancing Act (I've decided I'm going to be annoying and promote Craig's stuff at every opportunity because I like his stuff so much). I've got my most laid back tubes in it right now.


Edited by purrin - 10/19/11 at 10:05pm
post #426 of 937

For the uninitiated, would anyone care to explain what the waterfall plots of an ideal headphone/speaker should look like? Is it better for the "waterfall" to end earlier than go continue?

post #427 of 937
Thread Starter 
Quote:
Originally Posted by juman231 View Post

For the uninitiated, would anyone care to explain what the waterfall plots of an ideal headphone/speaker should look like? Is it better for the "waterfall" to end earlier than go continue?


perfect.txt.jpg

 

post #428 of 937
Quote:
Originally Posted by purrin View Post

 

I hear zero grain - then again it's probably the Eddie Current Balancing Act (I've decided I'm going to be annoying and promote Craig's stuff at every opportunity because I like his stuff so much). I've got my most laid back tubes in it right now.



Yeah whenever I take my Sextetts to meets and plug them into beastly amps like yours I don't hear the grain.  Meet conditions probably mask some of that too though. 

post #429 of 937
Thread Starter 

I'm still listening to them right now and ignoring all the other headphones in the box. They are not the last word in resolution, a little bright, but definitely good sounding. They remind me of good 80s speakers.

 

I'll measure some crappy headphones before I get to some good ones. I've got a HP1000 driver in a PS1 shell - that one's nice.


Edited by purrin - 10/19/11 at 10:22pm
post #430 of 937
Quote:
Originally Posted by rhythmdevils View Post

Yeah whenever I take my Sextetts to meets and plug them into beastly amps like yours I don't hear the grain.  Meet conditions probably mask some of that too though. 



Ever try them out of a Bottlehead Crack?

post #431 of 937

I don't think so.  I've never owned one, and at meets I usually just go for the ones with the biggest things sticking out of the top.  tongue.gif

post #432 of 937
Quote:
Originally Posted by rhythmdevils View Post

I usually just go for the ones with the biggest things sticking out of the top.  tongue.gif


Most guys do this.  Linear is overrated. 

 

post #433 of 937
Any idea what structurally causes the ringing profile? That long ridge to the foreground?
post #434 of 937

Quote:

Originally Posted by purrin View Post
Ouch I got this one totally wrong!


So....you are human after all.....wink_face.gif

 

post #435 of 937
Thread Starter 

 

Quote:
Originally Posted by rroseperry View Post

Any idea what structurally causes the ringing profile? That long ridge to the foreground?


Yes, the ridges are the resonances at particular frequencies. Click on the links to the headphone waterfall plots in my profile to see a wide example of these.

 

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphones (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › Headphone CSD waterfall plots