Thanks for the link. No pressure from me to rush along. These labours of love take a bunch of time.   I'll post my experiments here too. I will try electro etching at first since I already have some pens that can stand up to the salt solution.   I'm curious about photo resist methods...

Ok, that magnetic circuit looks very cool. :D I hope it works out. I suppose you can do a simple planar with the standard push pull at the same time so that the longer R&D time with the alternate circuit is not so painful.   To test NaOH I just put some of the granules from drain cleaner in...

I missed your reply.   I've also been playing with etching Al and have tried NaOH already. It works and the mylar was left intact but it killed the permanent marker that I wanted to use for the masking.   Check out another thread at DIYaudio entitled 'DIY AMT" or something like that, I...

Hey Salmon,   I'm also playing around with etching and such. I want to make planars and AMTs. You can get metallized film out of capacitors, that's one of the things that it is used for. I have some in front of me about an inch wide. Two of these side by side would be a good size. Otherwise...

Yes, I should have asked someone to try outdoor measurements in the summertime. One possible benefit of trying in winter, though, is that snow on the ground might attenuate the floor bounce even more.    Something that might work rather well in this scenario (given a low enough noise...

I don't have a Realiser but I do like playing around with HRTFs and such.   How many of you guys have made a speaker set up outdoors? Off axis response of the speakers becomes much less important because of the lack of reflections. You would start with a very dry sound but I would suppose...

If you're making your own headphones, I would strongly prioritize weight. Commercial products are generally heavier than they need to be, giving a sense of quality. I have transplanted T50rp drivers into a wooden body. If I were to do it again, I would go for a VERY minimal casing. You could get...

Hey thune,   As far as compensation goes, the first thing to note is that below about 1 KHz HRTFs are unimportant. We have an objective measure of flatness. (Acoustically at least. Some may like a bass boost to compensate for the absence of bass felt in the body.) This is where the mods make...

Quote: Indeed, the bass is over the top with a total open back (and sealed earpads). It's up about 5 -8 dB until 1 kHz. I'm hoping that lossy earpads will give less over the top bass, so that I don't need to damp very much. The driver has an easy time pressurizing the earpad cavity if it is...

Quote:   The kind of setup that I've used has been detailed by bluemonkeyflyer in this post, http://www.head-fi.org/t/452404/just-listened-to-some-fostex-t50rps-today-wow/8025#post_8354423 We've exchanged a lot of communication in our Fostex modding. The mic is just a WM61a capsule in...

Gainphile! I recognize you from your speaker website. I've been reading it a lot lately as I'm preparing to make a simple 2-way OB speaker as my first speaker build.   Have you considered the match to your HRTF when it comes to EQ'ing the headphones? If you make a simple in-ear mic from the...

I've taken the driver on and off a few times. You just need to flex the baffle and it will snap out. Quote:    

Thanks for the details. I haven't opened my AD700s up yet - only modded the earside to circumaural and changed the headband a little. I can't see how you could go wrong with the Response. This is something I'll have to try when I have time. That huge 53 mm driver really is nice.   Quote...

Quote: Where did you put the Response? Behind the purple grill. I have some AD700s in front of me here.   The AD700 have a very smooth response up and beyond 1kHz. Also you might want to experiment with additional sealing of the earpads (I made a thread on this). There is lots of...

Can someone tell me - do the FA-003 pads have memory foam, or regular foam inside?    I noticed that the new Philips L1 Fidelio has nice looking memory foam pads that might be a good match for the Fostex, if they start being sold as replacement parts.

That's excellent news! Closed headphones giving 3D sound are a real boon, because you don't have to spend so much effort making your theater equipment silent.  Quote:  

Sorry for the delay in responding - had a hectic few days.   I thought a little about the tube idea as well, which might be good for IEMs. With open headphones, the blocked air canal measurement has a chance to work well because the ear canal will be introduced correctly on playback if the...

Here's what my prototype looks like. At some point I will make custom moulds to hold them, for absolute consistency of placement. Consistency between measurements on different days is still good though.   Such a little cable is basically transparent for audio and also doesn't prevent a good...

Updated with measurements. ^ 

Once the velours have dried out I'll post a plot of no pads vs stock pads - you're right, the stock pads are crazy leaky. Then I'll wrap some cling wrap around them and see what happens. :D   EDIT: I'm back with some plots, using an in ear (blocked ear canal) WM61a microphone via my Xonar...

Yes the balance really was messed up with the gel pads. What I have in mind at the moment is to adjust how much air can vent from the velours so that more pressure can build up. I'm stitching some other pads for my T50RPs - I can measure those on the AD700s when they are ready.   AD700 pads...

Today I took the velour pads off of my pair of Audio Technica AD700s to clean them. I used that as an opportunity to see how they would sound with the Beyerdynamic gel pads. I was hoping for a bit of extra bass + comfort. Tweaking the Fostex T50RP has shown how important the pads are.   ...I...

So have you splurged on the Stax, or are you waiting to see what comes of their recent acquisition? If audio is your passion, it makes sense to treat yourself.   One thing that might make a rather big difference between the T50rps and Stax for HRTF emulation is that when using blocked ear...

It'll be great if they are the same. 2012 will be a banner year for driver harvesting!   I will try to find some weight scale to measure the T50 driver with. Do you have any microphones with which to measure the frequency response?   Quote:  

AC/AC it is then - I didn't realise that it was doing the conversion on board. I'll save the other DC supplies for T-amps. Thanks for the info guys.   Quote: