Just listened to some Fostex T50RPs today... WOW! - Page 660

The green graph plot is from BMF and the drop I guess is coming from his measurement rig.

I'm not sure those chasms are artifacts. I got them in my readings (same setup as BMF's) too. I've attributed them to the "pinna notch" (discussed on page 5 of this graduate thesis), the product of destructive interference caused by the outer ear. The exact depth and location of the notch varies in my readings, but it's often there. 

Also, with some mods/certain pads, the effect is audible in log sweeps. YMMV.

So, I'm comparing some stock t50rp (with shure pads) to my DBV #3 (with additional tweaks) t50rp.. and they are more alike than different, to be honest.

The differences only really stick out when I directly A/B and when I go from mine to stock.. The stock flaws stick out a bit more, but to be honest.. to an untrained ear, the flaws might even sound preferable with a lot of music. I'm listening to some hardcore, and the extra boominess isn't really hurting much. Mine are more accurate, but the stock ones don't sound bad. With more demanding types of music my modded pair pull even further ahead, FWIW.

TL;DR, mods help and are totally worth it.. but, with nothing but a pad swap, the t50rp are still very respectable for the price-point IMO.
 

BRING ON THE STONES

*edit* I should also mention if mine were DBV #3 modded exactly as the mod calls for.. They would sound even more different. I purposefully tried to keep my treble sounding about stock.

Heck, fluffing up the stock pads with cotton/felt/gauze works too. Getting a good seal is important. 

Quote:

Originally Posted by chrislangley4253 

So, I'm comparing some stock t50rp (with shure pads) to my DBV #3 (with additional tweaks) t50rp.. and they are more alike than different, to be honest.

The differences only really stick out when I directly A/B and when I go from mine to stock.. The stock flaws stick out a bit more, but to be honest.. to an untrained ear, the flaws might even sound preferable with a lot of music. I'm listening to some hardcore, and the extra boominess isn't really hurting much. Mine are more accurate, but the stock ones don't sound bad. With more demanding types of music my modded pair pull even further ahead, FWIW.

TL;DR, mods help and are totally worth it.. but, with nothing but a pad swap, the t50rp are still very respectable for the price-point IMO.
 

BRING ON THE STONES

 

*edit* I should also mention if mine were DBV #3 modded exactly as the mod calls for.. They would sound even more different. I purposefully tried to keep my treble sounding about stock.

Are your T50RPs fairly new? I remember the older revisions sounded pretty weird. The latest ones sounded better out of the box, I thought.

Quote:

Originally Posted by hans030390 

 

Are your T50RPs fairly new? I remember the older revisions sounded pretty weird. The latest ones sounded better out of the box, I thought.

Yes, they are new.

Quote:

Originally Posted by chrislangley4253 

http://www.head-fi.org/t/618659/fostex-t50rp-incremental-mods-and-measurements

You need dis

Thank you!! This is what I was looking for. 

I too will be leaving the vents open.

Quote:

Originally Posted by micmacmo 

I'm not sure those chasms are artifacts. I got them in my readings (same setup as BMF's) too. I've attributed them to the "pinna notch" (discussed on page 5 of this graduate thesis), the product of destructive interference caused by the outer ear. The exact depth and location of the notch varies in my readings, but it's often there. 

 

Also, with some mods/certain pads, the effect is audible in log sweeps. YMMV.

I was always in the belief that the "pinna notch" would be considered as measurement artifact for convenience's sake... was I wrong? :S would be nice to know if you guys do actually differentiate these two. Maybe I'll sound less crazy then 

Quote:

Originally Posted by kalbee 

I was always in the belief that the "pinna notch" would be considered as measurement artifact for convenience's sake... was I wrong? :S would be nice to know if you guys do actually differentiate these two. Maybe I'll sound less crazy then 

That's a great point. Am I measuring the sound quality produced by the headphone or the sound my ears actually receive? In my case I think it's the latter. I use my measurement kit to help me understand what I hear ("oh, so that dip at 5 kHz maybe why some female voices sound a bit recessed.") and as a way to compare between mods. I never thought I was making an absolute measurement of headphone sound quality. So even though the pinna notch was produced by my head, not the headphones, I thought it was "real" because I could hear it. (Not that I could do anything about it, aside from plastic surgery.)

The nature of FR curves has been touched on before in this thread and I know I've had further discussions in PMs. But your question really frames the issue nicely. Thanks!

is the stiff felt for modding made of polyester or wool?

Just registered today to post here my mod details. Been reading this thread forever! Not promising to follow because its HUGE, PM me for questions.

Hope to get vizomat today and do some wet felting in next days and finish up modding. Then i will post more info here.

p.s. Just noticed that if you turn the baffles inside-out you gain some volume to the cups and also can fix the assymetry of left and right speaker by turning one of them by 90 degrees.

Quote:

Originally Posted by superdux 

is the stiff felt for modding made of polyester or wool?

I'm pretty darn sure it's not wool.

Quote:

Originally Posted by MuZo2 

The green graph plot is from BMF and the drop I guess is coming from his measurement rig.

I had this exact issue, BMF explained that it was the measurements and how to fix it via the software, but I can't seem to find the post, sorry.

So has anyone tried those Russian mods yet? Im very tempted to mess around with the magnets.