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Author Topic: 2x XLR male --> 1/8 miniplug female, Help needed  (Read 4235 times)

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Offline lordbelial

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2x XLR male --> 1/8 miniplug female, Help needed
« on: January 21, 2006, 03:14:57 PM »
Hi!
Hi!

Just received an AD-20 loaned from a friend.

I would like to know how to make a cable to adapt the XLR's to a female miniplug. I know how, but I want to be sure, so I request your experience.

I would like to run these

CMC-4 (SP miniplug) --> SPSPBS1 (battery box) --> AD-20 --> NJB3 optical

I was thinking on making a 2xXLR to miniplug female adapter, so I can run the battery box behind, but I don't know how to wire the pins on the XLR, and if the "balanced" or "unbalanced" signals would matter or not.

Thanks!
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

My shows on the archive: http://www.archive.org/bookmarks/tapemaniac
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Offline poorlyconditioned

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #1 on: January 21, 2006, 04:18:20 PM »
Hi!
Hi!

Just received an AD-20 loaned from a friend.

I would like to know how to make a cable to adapt the XLR's to a female miniplug. I know how, but I want to be sure, so I request your experience.

I would like to run these

CMC-4 (SP miniplug) --> SPSPBS1 (battery box) --> AD-20 --> NJB3 optical

I was thinking on making a 2xXLR to miniplug female adapter, so I can run the battery box behind, but I don't know how to wire the pins on the XLR, and if the "balanced" or "unbalanced" signals would matter or not.

Thanks!

I've made quite a few of these:

Left XLR(M): pin1 + pin3 ->shield,  pin2 -> L cable
Right XLRM: pin1 + pin3 -> shield, pin 2 -> R cable
mini 3.5mm plug:  shield -> sleeve , ring -> R, tip -> L

One trick I use is run a single three-wire cable into the miniplug.  Then I run it to L or R XLR.  Then a second wire from one XLR to the other XLR.

This is easier because I only need to get one cable into the mini 3.5mm plug.  Also it takes less wire if I want a long cable, say 10 or 20'.

  Richard

PS: I don't know whether to solder pin 1 or the XLR to the housing or not.  I guess it doesn't hurt in this case.
Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **

Offline guysonic

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #2 on: January 21, 2006, 06:14:50 PM »
I don't know output specifics with AD-20, but preamplifiers use different balanced output schemes where sometimes grounding Pin 2 is needed (as with transformer type outputs) or Pin-2 should be left unconnected (as with some active amplifier driven outputs) where grounding pin-2 shorts out the amplifier driving that pin causing excessive amplifier power draw and heating, and this could cause problems. 

Usually owner's manual helps determine which output connection scheme works for unbalanced output conversion for that model preamplifier.  Calling tech support is good idea if there is any doubt.
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Offline guysonic

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #3 on: January 21, 2006, 06:22:44 PM »
Ops! BIG CORRECTION TO MY POST:

I meant to say:  PIN 3 (NOT SIGNAL HOT PIN 2) should maybe be grounded or NOT according to type of amplifier outptut for conversion from balanced to unbalanced output.

Another sip of coffee and the mind clears.
"mics? I no got no mics!  Besides, I no have to show you no stink'n mics!" stxxlth taper's disclaimer

DSM HRTF STEREO-SURROUND RECORDING SYSTEMS WEBSITE: http://www.sonicstudios.com

Offline lordbelial

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #4 on: January 21, 2006, 07:24:26 PM »
Thanks men!

I've searching around to some specs on the AD-20 but I couldn't find out anything.

In the denecke home page, the only spec I could find was...

   Input: Balanced 3 pin XLR at 10K

And that's all...
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

My shows on the archive: http://www.archive.org/bookmarks/tapemaniac
Member of  Busman Audio team

Offline poorlyconditioned

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #5 on: January 21, 2006, 07:42:14 PM »
Thanks men!

I've searching around to some specs on the AD-20 but I couldn't find out anything.

In the denecke home page, the only spec I could find was...

   Input: Balanced 3 pin XLR at 10K

And that's all...

You are putting unbalanced into a balanced input, which is OK.   Provided cables are well shielded and not that long.

Enjoy your AD20.

  Richard
Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **

Offline lordbelial

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #6 on: January 21, 2006, 08:03:24 PM »
Thanks men!

I've searching around to some specs on the AD-20 but I couldn't find out anything.

In the denecke home page, the only spec I could find was...

   Input: Balanced 3 pin XLR at 10K

And that's all...

You are putting unbalanced into a balanced input, which is OK.   Provided cables are well shielded and not that long.

Enjoy your AD20.

  Richard


Thanks man!

Monday evening i'll reach the electronic store and i'll buy some XLR, mini XLR for modding the CMC-4, cables and stuff.

I'll post the resutls and the photos

anyway, I just have opened the AD-20, would you like me to see the chipsets for you? I remember that you were interested in the ADC chips.

Let me know.
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

My shows on the archive: http://www.archive.org/bookmarks/tapemaniac
Member of  Busman Audio team

Offline poorlyconditioned

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #7 on: January 21, 2006, 09:13:13 PM »
Thanks men!

I've searching around to some specs on the AD-20 but I couldn't find out anything.

In the denecke home page, the only spec I could find was...

   Input: Balanced 3 pin XLR at 10K

And that's all...

You are putting unbalanced into a balanced input, which is OK.   Provided cables are well shielded and not that long.

Enjoy your AD20.

  Richard


Thanks man!

Monday evening i'll reach the electronic store and i'll buy some XLR, mini XLR for modding the CMC-4, cables and stuff.

I'll post the resutls and the photos

anyway, I just have opened the AD-20, would you like me to see the chipsets for you? I remember that you were interested in the ADC chips.

Let me know.

Yes, by all means, please take some pictures.  I've already seen one (AudBall's), but another wouldn't hurt.  IIRC the ADC is under some metal shield.  If you can open easily, I'd like to see a picture of it...  Also, *close ups* of the preamp section would be cool too.  From what I can tell it looks like a differential transistor pair in front of an SSM2135 dual opamp.  I'm curious how many opams are used and how they're wired too.

Anyway, thanks in advance for whatever you can get...

  Richard
Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **

Offline lordbelial

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #8 on: January 22, 2006, 04:06:23 AM »

Yes, by all means, please take some pictures.  I've already seen one (AudBall's), but another wouldn't hurt.  IIRC the ADC is under some metal shield.  If you can open easily, I'd like to see a picture of it...  Also, *close ups* of the preamp section would be cool too.  From what I can tell it looks like a differential transistor pair in front of an SSM2135 dual opamp.  I'm curious how many opams are used and how they're wired too.

Anyway, thanks in advance for whatever you can get...

  Richard


Yep.

I opened the metal shield yesterday. I'll post the photos tonight.

See ya later
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

My shows on the archive: http://www.archive.org/bookmarks/tapemaniac
Member of  Busman Audio team

Offline lordbelial

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Re: 2x XLR male --> 1/8 miniplug female, Help needed
« Reply #9 on: February 15, 2006, 05:08:06 AM »
Well... just to post some pics for my brand new cable.

Yesterday I tested the setup

CMC-4 (miniplug) -- BBox SPSPSB-1 -- Custom 2x(XLR)2miniplugfemale -- AD20 -- Optical cable -- NJB3 (wav 44.1Khz 16b)

And works great!




Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

My shows on the archive: http://www.archive.org/bookmarks/tapemaniac
Member of  Busman Audio team

 

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