|Solid State Talk all about solid state amplification.|
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
||Thread Tools||Search this Thread|
|4th September 2008, 03:12 PM||#1|
Join Date: Sep 2006
Balanced outputs used as inverting & Non-inverting preamplier outputs
I have a Yamaha C-85 that has regular as well as inverting preamplifier
outputs. It allows the bridging of two amplifiers or running two
stereo amplifiers with one channel inverted; potentially while both
channels go positive, each channel will use a different power supply
rail. I have used the C-85 with two Yamaha M-45s in both
configurations and it works well.
So. . .
A balanced output has an inverted and non-inverted signal. It seems
that you should be able to use the balanced output as two unbalanced
outputs--one regular and one inverted. It would be quite easy to
wire up an XLR or TRS plug and split it out to two RCA connectors.
There will be the usual impedance issues but the signals should work
|4th September 2008, 03:41 PM||#3|
Join Date: Jul 2004
Location: Scottish Borders
impedance matching is FAR more important than output voltage.
Impedance is not the side issue you imply.
The two outputs must exactly match impedance wise (and that includes capacitance) to better than 0.1%.
If not then you are wasting your time.
The corollary to this is that one signal could be absent and the balanced impedances would still allow good signal transfer to the balanced input with good common mode (noise+interference) rejection.
regards Andrew T.
Sent from my desktop computer using a keyboard
|4th September 2008, 10:16 PM||#4|
Join Date: Jan 2007
Blog Entries: 3
You have to try it, because the result would depend on the senders and receivers topology.
Chris, Do you mind clarifying your problem/question?
Seems we understand it differently.
such a blanket requirement of yours is wrong.
Source impedance matters with simple differential receivers more than with advanced inputs.
Accidentally we don't know anything of the input circuits.
And any common mode reduction is better than no one.
|19th September 2008, 03:25 AM||#5|
Join Date: Sep 2006
Sorry, I've been busy with the grape harvest in Sonoma County.
I want to use the balanced output of my mixer in the same
manner as I use my Yamaha C-85 preamplifier. There are four
output jacks. Two for Left and Two for right, but each second pair
is inverted. So it allows you to bridge an amplifier easily. The tip
of regular output will be swing high while the tip of the inverted
output will swing low(in ref to gnd).
I guess I can just wire up the system and find out. I don't need
balanced outputs for the short runs and the amplifiers have
unbalanced inputs. . .
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|sonic differences between inverting/non-inverting LM4780 VS both non-inverting LM4780||jarthel||Chip Amps||5||19th July 2007 12:37 PM|
|X2 Balanced Outputs Question||TwangBar||Pass Labs||2||15th March 2007 03:21 AM|
|whats the difference between inverting and no inverting||mikee55||Parts||1||7th January 2007 10:36 PM|
|Aleph Phase Inverting / non inverting||macka||Pass Labs||9||22nd February 2006 07:01 PM|
|Bridged/Stereo, w or w/o servo, inverting 3886, inverting buffer PCB||Alexander Rice||Chip Amps||9||27th March 2004 06:53 PM|
|New To Site?||Need Help?|