DT880 Balanced Detachable Dual-Entry Recable Questions
Feb 24, 2012 at 10:03 AM Thread Starter Post #1 of 23

N080D7

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A few weeks back I was asking about who would re-cable the DT880 to a balanced setup, but I have been reading up on DIY cable making techniques and am genuinely interested in re-cabling myself but I have a few simple questions that I have not found definitive answers to, but I am assuming that I have the right idea.
 
1) Can I create a detachable cable similar to the M50 mod that is still balanced as long as it is a duel entry hard-split (separate the left and right side wires rather than single entry) using stereo plugs for each side; will there be any quality loss with a detachable cable?
 
2) Are there any preferred/desired wire gauges for 600 ohm headphones?
 
3) Are there only 4 total required conductors; is a ground wire necessary at all for a balanced setup (dual 3 pin has two ground connectors, 4 pin does not have any)? (2 for each side, 1 +L  1 -L  1 +R  1 -R)
 
All answers are welcome on any of the questions plus additional information.
 
 
 
 
Also have a list of general items that I will need/want (*University already has a lot of excellent solder guns that I can use) so any additional recommendations/additions are welcome.
 
Parts/Items List:
- Solder gun*
- Solder
- Flux
- 1 insulated quad conductor wire   or   2 insulated dual conductor wire  or   4 insulated single conductor wire (is either setup better than the others in terms of noise and distortion reduction?)
- One hirose male interconnect
- Dual 1/8" male mono interconnects
- Dual 1/8" female chassis mono interconnects
- Wire sleeve
- Heat shrink
- One wire splitter (hard body splitters, rather than a custom heat shrink splitter)
 
Thank You!
 
Feb 24, 2012 at 10:55 AM Post #2 of 23
2 for each side (you can actually use 1/8th mono connectors rather than stereo at the headphone). 
 
I would run the cable to 4 pin xlr, then you can make adapter cables to dual 3 pin if you need it... (or to TRS for single ended use). Cleaner, lighter. 
 
The dual 3 pin xlr does not use the ground channels, typically. There is not a standard among amp makers on if pin 1 is grounded or not... so it is usually left dead, as far as I am aware. 
 
I prefer using a star quad cable (4 conductors under a main insulated sheath). Mogami 2893 and 2534 are two good options - easy to work with and not very expensive. 
 
Feb 24, 2012 at 12:46 PM Post #3 of 23


Quote:
1) 2 for each side (you can actually use 1/8th mono connectors rather than stereo at the headphone). 
 
2) I would run the cable to 4 pin xlr, then you can make adapter cables to dual 3 pin if you need it... (or to TRS for single ended use). Cleaner, lighter. 
 
3) The dual 3 pin xlr does not use the ground channels, typically. There is not a standard among amp makers on if pin 1 is grounded or not... so it is usually left dead, as far as I am aware. 
 
4) I prefer using a star quad cable (4 conductors under a main insulated sheath). Mogami 2893 and 2534 are two good options - easy to work with and not very expensive. 


1) I just went over the circuit for the mono and stereo connectors in my head and just remembered, yes I could use mono connectors. Thank you for reminding me. (I am assuming that you are saying: 2 needed, one for each side)
 
2/3) If ground really is unnecessary then I will go with another connector, probably the hirose connector since I will be using them primarily with my iBasso PB2.  Other upsides would be the even smaller form factor (although it might be a pain to assemble/solder), no need for an adapter with the PB2, can create any other adapters for other balanced terminators (3/4 pin XLR) or single ended as needed. Thank you for clarifying.
 
4) I have read a lot about the star quad cable and it has been on the top of my list for most likely cable to be used but I just have a few questions about it. One, how flexible is it?  Two, how easy is it to open up to split the conductors (some cables have really thick insulation that is a massive pain to open up).  Three, any recommended retailers/online stores to buy it from that is cheaper than most?
 
Thank you for all of your answers, certainly helped me cut down on what I will be doing.
 
 
Feb 24, 2012 at 1:44 PM Post #4 of 23
1. Yes. Two conductors per side (1 mono-connector each)
 
2/3. Yup - no ground, so the hirose would be fine. Though I do not know how easy it would be to make a hirose to TRS adapter, for instance (are female inline, not panel mount, hirose available?)
 
4. 2893 is very flexible, and very easy to open up and split conductors. I usually buy from Markertek, but there are many others (PartsExpress for instance)
 
Feb 24, 2012 at 2:31 PM Post #5 of 23
The hirose connectors are available through iBasso:
Hirose Male
Hirose Female
 
I think the only issue I will have with the hirose connectors will be soldering  since they are considerably smaller than standard 3 and 4 pin XLR connectors.
 
Thank you for the information on the quad star.
 
Feb 28, 2012 at 2:58 AM Post #6 of 23
Update
 
Creating a list of parts from various resources to purchase from.  Open to any opinions on the parts I have selected before I order anything.
 
 
Parts List:
- Quad Conductor Wire - Mogami W2893
- Male Hirose Interconnect - Hirose HR10A-7P-6P
- Male 3.5mm Interconnect - Switchcraft 35HDBAU
- Female 3.5mm Chassis - TecNec MF-CM
- Wire Sleeve - TechFlex 1/8 Braided Expansion
- Heat Shrink - 48 Piece Heatshrink
- Soldier - Cardas Quad Eutectic
- Desoldiering Braid - Desoldering Wick
- Flux - *Still Looking For Flux*
 
All help is appreciated, especially if it is for lower priced items of equal or better quality.
Thank you.
 
Feb 28, 2012 at 4:38 AM Post #7 of 23
If you want to keep the cable single sided you could try this.  Get any 4 conductor interconnect, like Mogami if you're on a budget, something compact.  Solder an iBasso plug onto the end of it.  On the other end, solder a 4 pin mini XLR (TA4F).  Then install a 4 pin mini XLR socket (male) onto the left earcup.  You can then use the stock wiring (connect the right earcup's 2 wires to the appropriate pins of the 4 pin mini XLR.  Then connect the left driver to the other 2 pins of the 4 pin mini XLR socket.  
 
You can come up with your own numbering convention since this would be your own custom cable type.  I recommend for the mini XLR doing pins 1, 2, 3, 4 for L+, L-, R+, R-.  If you don't know how to do an iBasso plug, I can post it here.
 
Feb 29, 2012 at 9:05 AM Post #8 of 23
I was considering a mini XLR, but I would rather have a dual entry setup since it provides even pressure on both sides of my head, rather than just on a single side, and I am pretty sure it would be a bit overkill using dual mini XLR's since both would only be using 2 pins.  Although if there are any recommended mini XLR connectors that are about the same form factor as a 3.5mm connector and locks in place I am all open to the suggestion.
 
Also, thank you for asking if I would like to know how to wire the iBasso connectors, but iBasso has the pin numbering and layout on their website.
 
Feb 29, 2012 at 3:14 PM Post #10 of 23
That just looks like a locking coaxial (essentially a locking 2.5mm power adapter jack). There are bunches of those - yuo shuold be able to get them for under $10 for a set. 
 
Something like this:
http://minute-man.com/acatalog/Online_Catalog_Locking_Coaxial_Power_Plugs___Jacks_202.html
 
Feb 29, 2012 at 3:18 PM Post #11 of 23
i hope this is ok to ask here, i wanted to do the similar for a pair of ms1is i have.
 
i wanted to use rean tiny xlr dual entry. either that or dual mono 3.5mm. i feel like the rean tiny xlr is more secure with the snap in. 
 
i read somewhere that if you use canare quad to use white for signal? any reason for that
 
Feb 29, 2012 at 3:35 PM Post #12 of 23
Generally speaking, which color you use for signal, on your headphones and your cables, doesn't matter. I try to be consistent over time though, so if I have to make repairs, I don't have to spend much time figuring out what I did the first time around. 
 
 
Mar 2, 2012 at 9:17 AM Post #14 of 23
Having issues trying to find accurate dimensions on the mini XLR connectors.  Anyone know how they would compare in size to similar 3.5mm connectors?  Would prefer as small of a connector as possible, while remaining sturdy enough to survive semi-portable use.
 

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