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DPA 4003 XLR Adapter
Old 17th September 2019
  #1
DPA 4003 XLR Adapter

Worked on a job today where the engineer used an adapter to convert 130VDC out of a millennia preamp to run a DPA 4003 on a regular 3-pin XLR. Anyone have the schematic for these guys? It would make the possibility of using 130VDC DPAs more palatable if I didn't need a s**t-ton of 4-pin XLR cable,

D.
Old 17th September 2019
  #2
Lives for gear
 
pentagon's Avatar
 

What you are looking for is the DPA PCC4000 Passive Connection Converter.

Other's have figured out the wiring for the discontinued cable converter


(and a reminder that the 130V 4-pin are unbalanced)
Old 17th September 2019
  #3
Lives for gear
 

The other option is to use Josephson C617โ€™s.
200 volt capsule polarization but works with
regular mic cables on any preamp providing
standard 48 volt phantom power.
Old 17th September 2019
  #4
Gear Head
 

I think the OP does not refer to the PCC4000 adaptor. I assume he asks for a schematic diagram to convert 4p XLR connectors to XLR 3p cables to run 130V a-symmectrically over 3 pin cables. It is possible. Use 1 and 2 at the XLR-3p side for audio and 3 for 130V. At the XLR-4p side 1 is shield, 4 is audio and 3 is 130V. 2 is not connected. But do not mess up, you kill your microphones...... or yourself !
Old 17th September 2019
  #5
Yes Folkie. That would be the best for me. I let a pair pass me by recently because I couldn't raise the funds. I was bummed.

But I think that what I was looking for was what is described by Orgeltonmeister.

Thanks all.

D.
Old 19th September 2019
  #6
Thanks. I am now prepared to rent some 4003s with no issues using them on location. Oh, and the Millennia to power them.

D.
Attached Thumbnails
DPA 4003 XLR Adapter-img_7688.jpg  
Old 19th September 2019
  #7
Gear Head
 

Quote:
Originally Posted by tourtelot View Post
Thanks. I am now prepared to rent some 4003s with no issues using them on location. Oh, and the Millennia to power them.

D.
Do you own a Millennia with 4p 130V option?
Old 20th September 2019
  #8
Quote:
Originally Posted by Orgeltonmeister View Post
Do you own a Millennia with 4p 130V option?
I have one available to me almost any time; a luxury to be certain.

D.
Old 21st September 2019
  #9
Gear Head
 

Quote:
Originally Posted by tourtelot View Post
It would make the possibility of using 130VDC DPAs more palatable if I didn't need a s**t-ton of 4-pin XLR cable,

D.
I've had 300' of cable for my 4003 and 4012s that's served me for over a decade now. I'm using 3 Avalon M5s with their 130V option. I don't find it 'un-palatable'. It's marked and kept in the same case as the mics. I also have the DPA Pre-pre as a fall back.

If I converted 3 pin XLR cables I'd have to mark those and think I'd worry more about mixing them up.
Old 21st September 2019
  #10
Lives for gear
 
didier.brest's Avatar
Quote:
Originally Posted by Kirk_ View Post
If I converted 3 pin XLR cables

How would you do so ?
You need 3 pin <---> 4 pin cable adaptors: see post #6 from tourtelot here above.
Old 21st September 2019
  #11
Right! Just the point. No special cables needed. Just a pair of adapters that got assembled in about 1/2 hour from stuff found in the bins in my shop. Presto.

D.
Old 21st September 2019
  #12
Gear Head
 

Quote:
Originally Posted by didier.brest View Post

How would you do so ?
You need 3 pin <---> 4 pin cable adaptors: see post #6 from tourtelot here above.
Remind me not to post before my first cup of coffee. I misunderstood by reading too quickly.

Now I get the point. Thanks
Old 4th September 2020
  #13
Here for the gear
 

Hi All, it seems like this is the right group to ask. I was given a old pair of 4003 from the B&K era. I am a classical guitar and am hoping to use it but, I have lots of questions about them. I use an RME Fireface 400. When I plug the mic into RMEโ€™s mic channels from the 130 v box with the phantom power off, I got very strong signal it tends to a very bright sound. I also tried ti simply goes through the balance input. However, when I do that, The signal I got a minimum. While I like the sound better, I need to normalize the recordings to get it loud enough. Am I doing something wrong? Are there something wrong with the mics? Help?
Old 4th September 2020
  #14
Gear Head
 

Which 130v box do you own? The green B&K 2812 or 2812mk2? Or maybe the orange HMA4000 or black HMA5000?

Do not use + 20dB. Use 0 dB for normal SPL levels and -12 (2812) for louder, and -20dB on the HMA4000. The 4003 has an output of about 42mV/Pa which is roughly 8 to 10 dB more level than Neumann and Schoeps small membrane microphones, so the output is rather hot, so to say.
Old 4th September 2020
  #15
Here for the gear
 

Which 130v box do you own? The green B&K 2812 or 2812mk2? Or maybe the orange HMA4000 or black HMA5

I have a black box. Let me check the model number.
Old 4th September 2020
  #16
Here for the gear
 

I have a black box type 2812.
Old 7th September 2020
  #17
Gear Head
 

Quote:
Originally Posted by Changer1 View Post
I have a black box type 2812.
The orginal 2812 has a switch with 0 dB, -6dB and -12dB. If you think your signal is too hot for your preamp, set it to -6 or -12.

The mk2 2812, was a modified 2812, where the upper switch position gives 20dB of gain, the middle position is zero gain and the lowest position has a attentuation of 20 dB.

The -20dB position is only for very loud signals, you may end up with too much noise with normal signal levels.
Attached Thumbnails
DPA 4003 XLR Adapter-2812.jpg  
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