cable pad to wire a line output to a dslr at DVinfo.net

David Aliperti · April 11th, 2018, 11:10 AM

can anyone link here a clear detailed scheme to build a TRS cable with 25 - 30 DB pad to wire a recorder line output to any mic in on reflex?

we are working on a corporate project, with basic interviews requiring a canon 5d and a lavalier and a boom, the bag with sound devices 664 is going to be so heavy and cumbersome so I thought to use a Tascam dr100 and wiring it directly into the canon 5d

the line output impedance on the tascam dr100 is 200 ohm, how much is the canon 5d mic input impedance?

Richard Crowley · April 12th, 2018, 12:05 AM

You could just buy an off-the-shelf commercial attenuator like this....

https://smile.amazon.com/dp/B000ZLX2TU

Or, if you want to make one (with a few pennies worth of resistors) built into a connector, one of the better references for building a pad is Rick Chhinn's website:

Uneeda Audio - Build your own attenuator pads

David Aliperti · April 12th, 2018, 12:43 PM

I need to know the precise impedance of the canon 5d mk3, what scheme is the right one considering we are relating to a TRS unbalanced stereo connection?

Jay Massengill · April 15th, 2018, 11:35 AM

I use cables like this one for connecting the mini-trs line out of audio devices to the mic input of dSLR's and other recorders.

https://www.bhphotovideo.com/c/product/906960-REG/kopul_ach4_25mon_line_to_mic_attenuator_cable_with.html/BI/2855/KBID/3801

That one above has a headphone output Y, but you can also get them with just a straight connection without the headphone jack.

David Aliperti · April 15th, 2018, 11:42 AM

I have just purchased this one

https://www.ebay.it/itm/SAA40-Stereo...QAAOSwajRZbGAI

Jay Massengill · April 15th, 2018, 11:53 AM

Let us know how it works out. I had not seen that brand and variety of boxes.

April 11th, 2018, 11:10 AM	#1
David Aliperti Regular Crew Join Date: Jan 2009 Location: Italy, naples Posts: 164	cable pad to wire a line output to a dslr can anyone link here a clear detailed scheme to build a TRS cable with 25 - 30 DB pad to wire a recorder line output to any mic in on reflex? we are working on a corporate project, with basic interviews requiring a canon 5d and a lavalier and a boom, the bag with sound devices 664 is going to be so heavy and cumbersome so I thought to use a Tascam dr100 and wiring it directly into the canon 5d the line output impedance on the tascam dr100 is 200 ohm, how much is the canon 5d mic input impedance? Last edited by David Aliperti; April 11th, 2018 at 12:04 PM.

April 12th, 2018, 12:05 AM	#2
Richard Crowley Trustee Join Date: Aug 2007 Location: Portland, Oregon Posts: 1,238	Re: cable pad to wire a line output to a dslr You could just buy an off-the-shelf commercial attenuator like this.... https://smile.amazon.com/dp/B000ZLX2TU Or, if you want to make one (with a few pennies worth of resistors) built into a connector, one of the better references for building a pad is Rick Chhinn's website: Uneeda Audio - Build your own attenuator pads

April 12th, 2018, 12:43 PM	#3
David Aliperti Regular Crew Join Date: Jan 2009 Location: Italy, naples Posts: 164	Re: cable pad to wire a line output to a dslr I need to know the precise impedance of the canon 5d mk3, what scheme is the right one considering we are relating to a TRS unbalanced stereo connection?

April 15th, 2018, 11:35 AM	#4
Jay Massengill Trustee Join Date: Jul 2003 Location: Burlington Posts: 1,976	Re: cable pad to wire a line output to a dslr I use cables like this one for connecting the mini-trs line out of audio devices to the mic input of dSLR's and other recorders. https://www.bhphotovideo.com/c/product/906960-REG/kopul_ach4_25mon_line_to_mic_attenuator_cable_with.html/BI/2855/KBID/3801 That one above has a headphone output Y, but you can also get them with just a straight connection without the headphone jack.

April 15th, 2018, 11:42 AM	#5
David Aliperti Regular Crew Join Date: Jan 2009 Location: Italy, naples Posts: 164	Re: cable pad to wire a line output to a dslr I have just purchased this one https://www.ebay.it/itm/SAA40-Stereo...QAAOSwajRZbGAI

April 15th, 2018, 11:53 AM	#6
Jay Massengill Trustee Join Date: Jul 2003 Location: Burlington Posts: 1,976	Re: cable pad to wire a line output to a dslr Let us know how it works out. I had not seen that brand and variety of boxes.