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Old 13th March 2012, 08:04 AM   #1
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Default Sennheiser HD650 stock cable

Greetings all.

I've been asked to modify a stock HD650 cable to use the HP with a balanced amp.

Can anyone tell me if the stock cable is suitable to be modified this way.

I could just cut the molded plug off and find out, but would prefer to be forewarned.
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Old 17th March 2012, 02:26 PM   #2
Stixx is offline Stixx  Germany
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Quote:
Can anyone tell me if the stock cable is suitable to be modified this way.
I guess you can't... see link

Learning Center - Balanced Headphone Drive FAQ | HeadRoom Audio
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Old 17th March 2012, 04:50 PM   #3
qusp is offline qusp  Australia
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no you cant afaik, but then funnily enough even though ive made many senn cables and actually own HD600, ive never reterminated the stock cable, so not sure if its 4 core. i bought mine used and they had no stock cable

stixx: the headroom link doesnt say anything about the stock cable, at least not the page you linked.

Last edited by qusp; 17th March 2012 at 05:01 PM.
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Old 17th March 2012, 05:11 PM   #4
Stixx is offline Stixx  Germany
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Quote:
stixx: the headroom link doesnt say anything about the stock cable, at least not the page you linked.
Sorry I was in a hurry...
stock Sennheiser cables are 4 core, both HD600 and HD650 (since I recabled both of them, staying unbalanced ).
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Old 17th March 2012, 05:24 PM   #5
qusp is offline qusp  Australia
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aha, so why did you say it couldnt he done? hehe stock cable is flimsy as hell so I assumed it was only 3 core
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Old 18th March 2012, 07:23 AM   #6
Wolfsin is offline Wolfsin  United States
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Default 'twerks

The stock cable contains two red varnished and two green varnished multistranded copper conductors with some kevlar for strength. Despite being widely maligned and devilishly difficult to solder to a new connector, it works for balanced and one of my HD600 cables is made that way.

For hints on varnish / lacquer removal (and other less salient topics) see
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Originally Posted by Wolfsin View Post
soldering thru the red and green lacquer was difficult.
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Old 21st March 2012, 11:18 PM   #7
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If you get a gob of solder on the tip of your soldering iron and let the varnished cable sit there for a bit the varnish will burn off (you'll be able to tell when it's smoking) and the cable will be tinned and ready to solder. A higher watt soldering iron probably makes this easier.
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Old 23rd March 2012, 04:42 AM   #8
rjm is offline rjm  Japan
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Quote:
Originally Posted by Wolfsin View Post
...and devilishly difficult to solder to a new connector...
No kidding. I will never, ever do that again.

But yes, it is possible convert the stock cable to balanced by chopping off the 1/8" mini-jack and connecting a 4 pin connector in its place.
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Old 25th March 2012, 05:26 PM   #9
Wolfsin is offline Wolfsin  United States
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Default The devilIz in the details

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No kidding. I will never, ever do that again.
As my eyesight weakens and my hands shake a bit more I will not likely often repeat that task myself.

My efforts to build superior cables for HD-6x0 was a real learning experience about cables and people as well. I was never able to find cable that improved the performance of my Senns despite spending time and money attempting to do so. The stock cable appearance is IMO deceptive.

My hypothesis is as follows. Sennheiser got a rep for flimsy cables years ago so they engineered a flexible kevlar reinforced, dual twisted pair alternative that is light, flexible, and suffers minimal crosstalk but is not puppy proof The original rep lives on and cable vendors have good reason to perpetuate the old 'news'. While it is true that my hearing is not the greatest anyone suggesting dual shielded cabling ought to be completely ignored. Personally I prefer to not be limited to the 'Y' of the stock cabling but that requires soldering that is only slightly less devilish than those four pin connectors.
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