ohotonge
100+ Head-Fier
- Joined
- Nov 23, 2011
- Posts
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Comparing headphones are always enjoyable!
I just randomly stumbled on this balanced cable for the MDR-1A. Looks like it might fit.
http://store.sony.com/high-performance-portable-audio-cable-for-mdr-1a-zid27-MUCS20BL1/cat-27-catid-All-Portable-Audio-Cables
Well, a few things. First, the PM-3's pinout is different than the MDR-1A's.
The MDR-1A input to headphones is TRRS ordered: L+, R+, R-, L-
The PM-3 input to headphones is TRRS Ordered: L+, R+, L-, R-
Your Left and Right cold signals would be swapped.
Next you need to remove those extra 3.5mm terminations. That will be loads of fun. That cable itself has a sleeve over it that will be a mess once you cut into it. If anything, one would want to retrieve a completely stock cable from these headphones. It will also have the 3.5mm TRRS termination and 4 wires on the inside. You however will not find that on the Sony Website. All the cables for those headphones will have the sleeving which is annoying to deal with.
Thanks for posting this!
I almost bought that cable to try with my PM-3 but didn't know the 1A pinout. Even contacted Sony but couldn't get an answer.
You saved me a big headache.
No Problem,
I actually had the MDR-1A's and decided I didnt like them and am now considering the PM-3's. I bought that cable, tested the pins, and returned it after making my decision about the headphones. Just got my refunded money today actually :-D
Wonder why Sony swapped the negative pinouts? Maybe just to be difficult or more proprietary.
Didn't get that cable due to relatively high price (for a factory cable anyway; thanks Sony) and am having a custom cable made for the PM-3 (may have it in a couple weeks).
who is making yours? If you dont care to share publicly, just PM me. I am interested mainly in which after market 3.5mm TRRS male plug will fit the PM-3's properly to confirm that it fits them
Surf Cables is making mine but still waiting to confirm if the 3.5mm plug will fit the PM-3 (everyone is having a difficult time with that part).
Plug similar to this one I found should fit but yet to be fully tested:
http://www.amazon.com/dp/B00LBPKSNW/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=EWA9CUCTHPNC&coliid=I1O17X3GWCPGM5
The PM-3 are finally available in Canada.
http://shop.solutionsav.ca/pm-3-closed-back-planar-magnetic-headphones-black-finish/
Guys,
does our hp contain 4pin entrance really ready for balanced connecton? or it just connects L- and R- to ground?
Yes, you will need a 3.5 mm TRRS. Here is the pinout from the tip to the ring: L+, R+, L-, R-.
I was talking to the person in charge of the Loaner program and they confirmed it after I expressed my disappointment at no balanced. They simply chose to not manufacture their own balanced cable, but did implement a TRRS plug to allow for people to make their own. DHC and Moon Audio were two of the manufacturers that they said were making them.