ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: Any Reason I shouldn't Do This?  (Read 912 times)

Robert Lunceford

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 365
Any Reason I shouldn't Do This?
« on: March 14, 2019, 08:38:42 pm »

I am going to be running sound for a small combo (vox, piano, drums) in a space that has a house PA. There is not much flexibility or easy access with patching mic cables and accessing the mixer as it is in an audio closet.
There is a podium that has an XLR cable that I can access that feeds CH 1 of their Behringer XR18.

My plan is to bring in my QU PAC and use it to do the actual mixing.
I will take the main mix output of the QU PAC and feed that signal into a BSS AR133 active DI box, 40db pad engaged.
The DI out is connected to CH 1 of the XR18 via the podium mic cable.

I have tested this set up and it appears to work well. In my test system I was using a Soundcraft analog mixer in place of the XR18. Is there anything I am missing that might come back to bite me?



« Last Edit: March 14, 2019, 08:44:40 pm by Robert Lunceford »
Logged

Rob Spence

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 3217
  • Boston Metro North/West
    • Lynx Audio Services
Re: Any Reason I shouldn't Do This?
« Reply #1 on: March 14, 2019, 08:47:29 pm »

I suggest a passive DI. All you need is a transformer to protect your mixer from theirs.



Sent from my iPad using Tapatalk Pro
Logged
rob at lynxaudioservices dot com

Dealer for: AKG, Allen & Heath, Ashley, Astatic, Audix, Blue Microphones, CAD, Chauvet, Community, Countryman, Crown, DBX, Electro-Voice, FBT, Furman, Heil, Horizon, Intellistage, JBL, Lab Gruppen, Mid Atlantic, On Stage Stands, Pelican, Peterson Tuners, Presonus, ProCo, QSC, Radial, RCF, Sennheiser, Shure, SKB, Soundcraft, TC Electronics, Telex, Whirlwind and others

Geert Friedhof

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 482
Re: Any Reason I shouldn't Do This?
« Reply #2 on: March 14, 2019, 09:45:17 pm »

I suggest a passive DI. All you need is a transformer to protect your mixer from theirs.



Sent from my iPad using Tapatalk Pro

Why? Just use the phantom of the xr18, and be done with it... I think it's a solid plan.
Logged

Robert Lunceford

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 365
Re: Any Reason I shouldn't Do This?
« Reply #3 on: March 14, 2019, 10:50:49 pm »

When I set up my test system I tested both a passive Whirlwnd Director and the active BSS DI. The signal was a bit hot with the Whirlwind. The only pad it has is for connecting to an amplifier output. This knocked down the signal level too much. The BSS on the 40db pad setting was just right. The podium mic is a condenser so the phantom is already engaged on that line.
Logged

Eric Snodgrass

  • Full Member
  • ***
  • Offline Offline
  • Posts: 168
Re: Any Reason I shouldn't Do This?
« Reply #4 on: March 15, 2019, 01:12:39 am »

Robert, I think your plan is solid. 
There's a certain multi-purpose room where I occasionally do gigs that only has a single XLR mic-level input in their booth that I can use to tie into their P.A. rack.  I use a Shure A15LA -50db attenuator in line when I connect my mix rig to this input.  It works perfectly every time. 
Logged

Chris Grimshaw

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1063
  • Sheffield, UK
    • Grimshaw Audio
Re: Any Reason I shouldn't Do This?
« Reply #5 on: March 15, 2019, 04:46:01 am »

The plan is okay, so long as you can make sure the venue's desk doesn't have any processing on that input.

It does also include an un-necessary round of analogue-to-digital-to-analogue conversion, plus padding levels only to boost them again, so I'd expect an improvement in sound quality from going direct from your desk to the PA, if possible.

Chris
Logged
Sheffield-based sound engineering.
www.grimshawaudio.com

Douglas R. Allen

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 893
Re: Any Reason I shouldn't Do This?
« Reply #6 on: March 15, 2019, 06:10:25 am »

The Non Clip input of the 1/4 inch combo jacks are rated at +21 dbu. I'd get a XLR to 1/4 inch tip,ring,sleeve adapter and go straight out of your mixer and into channel 1 line level input. Start with the gain down and adjust from there. Page 34 in their manual.   

https://media.music-group.com/media/PLM/data/docs/P0BI8/X-AIR-Series_M_EN.pdf

As an example.

 https://www.google.com/search?q=XLR+to+1/4+adaptor&client=firefox-b-1-d&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj2rrfO84PhAhUko1kKHXWECK4Q_AUIDygC&biw=1920&bih=928

Keep it simple.

Douglas R. Allen
« Last Edit: March 15, 2019, 06:13:39 am by Douglas R. Allen »
Logged

Stephen Swaffer

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2194
Re: Any Reason I shouldn't Do This?
« Reply #7 on: March 15, 2019, 12:37:59 pm »

How's he gonna do that when he can't get to the mixer-which is why he is using the XLR in the first place?
Logged
Steve Swaffer

Kevin_Tisdall

  • Full Member
  • ***
  • Offline Offline
  • Posts: 115
  • Milford, CT
Re: Any Reason I shouldn't Do This?
« Reply #8 on: March 15, 2019, 03:20:26 pm »

I am going to be running sound for a small combo (vox, piano, drums) in a space that has a house PA. There is not much flexibility or easy access with patching mic cables and accessing the mixer as it is in an audio closet.
There is a podium that has an XLR cable that I can access that feeds CH 1 of their Behringer XR18.

My plan is to bring in my QU PAC and use it to do the actual mixing.
I will take the main mix output of the QU PAC and feed that signal into a BSS AR133 active DI box, 40db pad engaged.
The DI out is connected to CH 1 of the XR18 via the podium mic cable.

I have tested this set up and it appears to work well. In my test system I was using a Soundcraft analog mixer in place of the XR18. Is there anything I am missing that might come back to bite me?



I've done the same thing before with a different combination of mixers.  (X32==>analog Mackie)  Similar issue - can't repatch but could get to the mixer controls.  Just make sure the XR18 input is bypassing any processing.  You may want to use what they have set up for output processing (eq/limiting) or not.   You may be able to bypass those as well.

--Kevin
Logged
Pages: [1]   Go Up
 


Page created in 0.028 seconds with 24 queries.