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ai3us 5th February 2012 01:49 AM

DIY HQ Headphone question
 
About a year ago I made some noise-cancelling headphones by basically gutting some noise cancelling ear muffs (for shooting) and putting some low quality speakers from cheap walkman headphones in there. It worked really well and the price was around $20. It was worth it considering the quality was far superior to other, cheaper, noise cancelling headphones. But I wanted to make some now with higher quality speakers so the sound was better.
Does anyone know of some high quality headphone speakers that are cheaper (possibly because of a terrible body or something) that could still keep the whole thing under 100 bucks or so? (the ear muffs are about 15).

gootee 5th February 2012 02:40 AM

It sounds like those were only ambient-attenuating "closed" headphones. "Noise-cancelling" is usually meant to imply that they actively cancel ambient sounds, by generating out-of-phase copies of any ambient sounds and injecting them through the speakers, to cancel their sound waves as they enter your ears, making them disappear (ideally).

ai3us 5th February 2012 03:29 AM

Quote:

Originally Posted by gootee (Post 2892336)
It sounds like those were only ambient-attenuating "closed" headphones. "Noise-cancelling" is usually meant to imply that they actively cancel ambient sounds, by generating out-of-phase copies of any ambient sounds and injecting them through the speakers, to cancel their sound waves as they enter your ears, making them disappear (ideally).

Yes exactly, I am sorry I wasn't too clear. I am looking to recreate these at a higher quality though because they seemed more effective than any noice-canceling or "closed" headphones I have tried prior or since.

gootee 5th February 2012 07:14 AM

Cool. Got it.

I wonder how much it would cost to build electrostatic drivers for them.

By the way, what are the inside dimensions that you have to work with? That might affect what people can recommend.

doctorron 7th February 2012 01:42 PM

As e'stat drivers are simply capacitors its not very hard to make a driver. However, e'stats take a tankload of power to make them sing.

Bose has some of the best active noise-cancelling circuits out there...but their headphones sound like total crap IMHO--not even up to my CHEAP Grados, let alone the $350 Grados.

Where they DO come in handy is flying. I use a Bose headset (basically QC15s with a mic) and the ANC does very well attenuating the LOUD noise of the piston engine/prop in my Cessna. They're great for radio comms and listening to VOR/AM beacons though!

DocRon

sgrossklass 7th February 2012 07:15 PM

For a maximum of passive isolation, there always is the possibility of using a combination of well-isolating IEMs (*) and earmuffs.

*) You can use this table along with measured isolation data as a starting point. Note that isolation depends on tips, with triflanges usually doing best and foam ones not far behind.

ai3us 10th February 2012 02:25 AM

So I actually can't find the internal dimensions online anywhere, and I don't have my old set anymore unfortunately. I believe I have about 3 inches by two inches, so there is a pretty good amount of room. The limiting factor would be the depth, I don't think anymore than an inch of depth would work.

And thanks for the table sgrossklass, I am taking a look over it now!

ai3us 10th February 2012 02:45 AM

So sgrossklass, I was looking at the list of IEMs and I can't help but to wonder if you sacrifice quality for the size of IEMs (sorry I do not know much about this stuff). For example, am I paying more for an IEM that delivers the same quality of sound as a larger speaker? Does the price go up because they need to put the same quality into a smaller speaker?

DocRon, would I be able to build an e'stat driver that could be powered simply by a standard portable media player?

qusp 10th February 2012 04:13 AM

my jh13 custom fit IEMs beat out all but the very top fullsize headphones to my ears. but then as you guessed, yes i paid for them at 1300usd. you can get similar performance models for around 600-700. if you need attenuating headphones, for starters i dont see electrostats being any god as they kinda need to breath, you dont get much better than the 26db passive attenuation offered by iems and the imaging/speed of high quality in ears is unparalleled. with a suitable source/amp they are similar in sound to a set of ATC monitors, but without the size of soundstage of course

Tajzmaj 10th February 2012 04:35 AM

Well I'm DIY guy but to build headphones..?
And to stay under 100$ and to build electrostatic headphones..?
And than probably you want to build nice tube amp to drive it..? and under 100$
Sorry, just my opinion, but I think it is impossible.
My advice would be to buy something ready made. If you can effort to double budget than Shure SRH940 offers a lot for it's price. Good noise isolation.....
I have HD650 which I like, but must admit that SRH940 are more than worth to buy. Shure prove again that they offer hard to beat price/performance ratio.
Regards


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