Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

PA Systems A forum for discussion of all parts of a sound reinforcement or DJ system: loudspeakers, mixers (desks) etc.

Looking for schematic for a phantom powered 2 channel mixing stage
Looking for schematic for a phantom powered 2 channel mixing stage
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th November 2017, 08:42 PM   #1
robkrieg is offline robkrieg
diyAudio Member
 
Join Date: May 2017
Default Looking for schematic for a phantom powered 2 channel mixing stage

Hello,
I'm looking for a schematic for a simple phantom powered 2 channel mixing stage for microphone level signals without any extras like eq or the like.

Purpose is to root two input signals to one input of my zoom r16 recorder.

I have to do some live recording with more than 8 instruments, but some of them are not that important and/or not played at the same time, so I thought I could mix them down to one recording track.

Would be great if the circuit runs on phantom power since the zoom has 2 channels that provide it.

I'll appreciate any ides, the simpler the solution, the better

Yours
Rob
  Reply With Quote
Old 16th November 2017, 12:19 PM   #2
turk 182 is online now turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
is active a must?
if not then a passive mixer could do, on the real cheap i've used a "Y" to connect two mics to one input but those sources didn't need individual eq so simply summing them to one input worked.
phantom power has a limited amount of current to supply active devices.
  Reply With Quote
Old 16th November 2017, 04:11 PM   #3
robkrieg is offline robkrieg
diyAudio Member
 
Join Date: May 2017
Hello turk 182,
thank you for your thoughts. I'm not sure whether active is a must, to be true.

Maybe I should explain the exact issue:
I got a standard dynacord 16 channel live mixer with insert jacks on each channel. That's where I want to take the signal from for recording. And I got a 8 channel zoom r16 recorder. So if I had only 8 instruments to record, everything would be fine (except the special non circuit breaking patch cables I have to solder ...).

Now my problem is, that some of the musicians play several instruments, but only one per song. Those instruments go into seperate channels of the live mixer and this way I'm ending up with more than 8 channels. But since only one of those instruments is played during one song, I could easily record all instruments of one musician to one track of the recorder.

That's why I was thinking about simple mixing stages. I'm not really sure whether I would get a lot of unwanted talkover between the channels by using a Y-cable. Maybe something passive with resistors could work, but there would be a significant loss of gain when the resistors have hight enough values to avoid talkover to the other channels. That's why I considered it best to have a small active circuit for the mixing stage so that no talkover can take place.

Yours
Rob
  Reply With Quote
Old 16th November 2017, 04:55 PM   #4
turk 182 is online now turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
not sure of the exact model of mixer you have and whether or not all the AUX mixes you have at your disposal are being used,but for what you want to do i would use an aux to sum the inputs of interest to the Zoom. that track should only contain the "one" instrument per song short of a conflict where two are used at the same time and ability to mix down individually needs to be retained.

many newer consoles have direct outs per channel that would work via passive summing as that "out" is usually buffered and as long as the number of sums is not excessive.
  Reply With Quote
Old 16th November 2017, 05:02 PM   #5
turk 182 is online now turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
this kind of thing may also be achieved by using an "available" sub group.

Last edited by turk 182; 16th November 2017 at 05:04 PM.
  Reply With Quote
Old 17th November 2017, 01:07 AM   #6
robkrieg is offline robkrieg
diyAudio Member
 
Join Date: May 2017
Hi turk 182,

sorry, should have mentioned this: no direct out, no sub groups available and all 4 Aux mixes in use for 3 monitor mixes and 1 internal effect (room).

The mixer is a Dynacord CMS 1600, 16 channels, 4 Aux, no groups, no direct outs.

Yours
Rob
  Reply With Quote
Old 17th November 2017, 01:16 AM   #7
robkrieg is offline robkrieg
diyAudio Member
 
Join Date: May 2017
Hi,
here's the complete list of instruments, mixing channels and recording tracks needed:
3 channels / 3 tracks percussion (Cajon, Djembe, mono Overhead)
1 channel / 1 track acoustic bass
1 channel / 1 track acoustic guitar
1 channel / 1 track lead vocals
makes 6 tracks so far. In addition:
2 channels / 1 track violin / reed organ (played alternately by 1 musician)
2 channels / 1 track backing vocals (not that important, can go to 1 track)

So you can see I'd need 2 AUX mixes or 2 sub groups, or 2 simpe 2 channel mixing devices, preferably passive or phantom powered.

Rob
  Reply With Quote
Old 17th November 2017, 02:22 AM   #8
turk 182 is online now turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
ok i see
a quick look at the manual for the Dynacord CMS 1600 reveals something about the mixer i was not aware of.
how much do you know about the Cubebase LE6 interface? i don't know if this feature could be a potential solution but an quick look seems to point to that possibility and it only requires a single USB connection from the mixer to the Zoom.

Last edited by turk 182; 17th November 2017 at 02:34 AM.
  Reply With Quote
Old 17th November 2017, 10:59 AM   #9
robkrieg is offline robkrieg
diyAudio Member
 
Join Date: May 2017
Hi turk 182,

I'm not sure whether I completely understand your idea. Can you point me to the chapter or page of the Dynacord manual where I may find the needed information?

I think I remember there might be some USB connector at the rear of the mixer, but I can't find anything about the interface in the manual ....

Yours
Rob
  Reply With Quote
Old 17th November 2017, 11:30 AM   #10
turk 182 is online now turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
look here http://www.dynacord.com/binary/Appli...00_en_VS03.pdf
  Reply With Quote

Reply


Looking for schematic for a phantom powered 2 channel mixing stageHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
48v battery powered phantom supply carlmart Power Supplies 16 17th September 2017 12:28 PM
Phantom powered mic preamp pixpop Instruments and Amps 0 9th April 2017 06:41 PM
"Phantom Powered" 48v Class D Powered Speaker JayShoe Class D 2 4th July 2016 09:25 PM
Phantom Powered Stereo DI JFace Analog Line Level 1 31st January 2015 06:08 PM
How do I make a phantom-powered XLR mic out of WM60AY? Spasticteapot Equipment & Tools 2 18th September 2009 05:54 AM


New To Site? Need Help?

All times are GMT. The time now is 11:11 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki