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[ElectronicGoldMine] High impedance 300ohm 1.5' "made for a factory making expensive headphones"

post #1 of 25
Thread Starter 

Might be worth a try, anyone have experience with those or know who they were originally for?

 

 

"High impedance 300ohm 1.5" diameter mylar cone speaker was made for a factory making expensive headphones. these are brand new and are only 0.3" thick. REG. $1.25"

 

 

 

http://www.goldmine-elec-products.com/prodinfo.asp?number=G18837

post #2 of 25
Thread Starter 

Anyone?

post #3 of 25
Thread Starter 

You guys are no fun

post #4 of 25

Thanks for posting those up, for $1.25 each ($2.50/pair) I cant think of a good reason not to buy a few blind. The entertainment/learning value from a failed experiment is worth more than what they cost. If they work well so much the better. 

post #5 of 25
Thread Starter 

They were in sale yesterday for 0.90$. I would order some but with shipping to Europe and all... Could reveal to be some amazing little speakers. Or turn out to be horrible, but like you said... at that price.

post #6 of 25

Shipping to France doesn't seem to be an option confused.gif

post #7 of 25

I ordered a few sets of these as a project.  I will post some info over the next few weeks.  

post #8 of 25

Won't allow shipping to Australia....

post #9 of 25
Thread Starter 
Quote:
Originally Posted by hchanrn View Post

I ordered a few sets of these as a project.  I will post some info over the next few weeks.  

 

Sounds good keep us posted.

post #10 of 25

Just a small update....

 

Finally got the cans put together.  The drivers definately need a good burn in.  Very hollow and flat sounding when I first hooked it up.  After 2 hours of playing things are a little better.  Going to leave them on for a day or two and see how they sound.  So far so good.  I will get some pictures up with a price list of the supplies.

post #11 of 25

HJC_5413

 

 

So I ended up using a set of head band and cups from a Sony MDR 7506 from Trew Audio Inc.  Canare L-4E5C braided with a stand of kevlar kite string to give a little strength to the cable into each cup.

 

 

HJC_5407

 

The pads were from ebay.  Nice fit.

 

 

HJC_5411

 

The drivers mounted to 1/4" oak.  Drilled a few holes to vent into the cup.

 

Parts list:

 

Sony MDR 7506 cups and head band   http://www.trewaudio.com/store/Sony-7506-Replacement-Headband-and-Cups.html  $19.95

 

300 ohm drivers from Electronic Gold Mine http://www.goldmine-elec-products.com/prodinfo.asp?number=G18837  $1.25 x 2 = $2.50

 

Canare L4E5C cable 12 ft with 3.5 mm ends cut in half http://www.ebay.com/itm/120951039835?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649  $14.95

 

Ear Pads http://www.ebay.com/itm/170962038775?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649  $4.95

 

Total cost (minus shipping) = $35.00

 

Still burning the set in.  So far not bad....need the mids and highs to come in a little more.  Low end is not bad...doesn't beat the hell out of the ear drums (the way I prefer).

post #12 of 25

Only available to 6 countries, anyone who's bought more than he needs or intends to buy some in the near future?

post #13 of 25

Well...I think the cans should be burned in by now or at least something should be happening by now...but I cann't seem to get the mids and highs to come up well.  The entire sound spectrum seems to be compressed together.  Not sure what to do...anyone with suggestions?  With the drivers recessed 1/4" behind the mounting plate...can that make a difference?  


Edited by hchanrn - 1/22/13 at 8:28pm
post #14 of 25

Is the ground hooked up properly? 

 

Measure resistance at the plug:

1: Tip to sleeve

2: Ring to sleeve

3: Ring to tip

 

1&2 should be the same within a few percent (perhaps 10%) 

3 should be equal to 1+2 or put another way 1&2 should each be half of 3. 

 

Mounting the drivers slightly behind the baffle should not have a significant effect on the sound, provided the driver membrane does not touch the actual baffle. In the pictures you posted it looks like there is a few mm clearance so this should not be an issue. 


Edited by nikongod - 1/23/13 at 12:00pm
post #15 of 25
Thread Starter 

Any updates to share?

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