Split signal on patch

[oyanliz]

Hi all,

Is it possible to split a signal of one bantam connector to other 6 connectors without any losing? I mean, to have the same signal of one bantam connector, bridging the signal soldering cables internally on the patch.

I would appreciate any opinion.

Best regards.

Oihan

[MartyAckerman]

If I'm not mistaken, what you're referring to is a "mult" or "parallel".  It is wired at the patchbay as you described. All of the tips, rings, and sleeves are shared, so putting a signal into one of them makes that signal available on the others. I think there are some 4 way mults pre-wired into SSL patchbays.

You can also split signals out of a half normalled output.  So you'd plug in a cable to the top (output) row and send that wherever you need, but it would also continue through the normal route to wherever it was going if you hadn't patched in a cable.  I hope I'm describing that clearly.  The manual also covers this and points out where you can find the mults and normal/half normals in your patchbay.

[oyanliz]

Yes I was referring to “parallel”. My doubt was if is possible to do… for example… 6 parallel points from 1 point of the patch… without losing signal. I know that maybe is a beginner question… but I never have done this and I knew most of you could answer to the question.

Thanks for answering Marty.

Best regards.

Oihan

[Tonemiester]

My only concern would be the resulting impedance could be low depending on the destination impedance after splitting 6 ways.

Mike Trimble

[pascal.verdet]

"My only concern would be the resulting impedance could be low depending on the destination impedance after splitting 6 ways. "

Right !

[amillar]

Hi,

On a 4000/6000/8000 you can do this with no problem at all. Yes, you will lose a tiny bit of signal, maybe 0.5db when all are plugged in? With nothing plugged into them you will of course lose no signal.

The amount of signal loss depend on exactly which outputs and inputs you are using, I'm assuming any of the 4000 balanced outputs and patching into a 4000 input or other equipment with an input impedance of 10k ohm or higher - the usual type of thing. (If you're patching into six 1960's transformer input valve compressors then very impressive, and it will look wonderful, but you might have problems!)

One exception I can think of: don't do this on the channel insert points, they are not properly buffered outputs and are only just capable of driving a single input.

Cheers,

Andy

[pascal.verdet]

Hi,

On a 4000/6000/8000 you can do this with no problem at all. Yes, you will lose a tiny bit of signal, maybe 0.5db when all are plugged in? With nothing plugged into them you will of course lose no signal.

The amount of signal loss depend on exactly which outputs and inputs you are using, I'm assuming any of the 4000 balanced outputs and patching into a 4000 input or other equipment with an input impedance of 10k ohm or higher - the usual type of thing. (If you're patching into six 1960's transformer input valve compressors then very impressive, and it will look wonderful, but you might have problems!)

One exception I can think of: don't do this on the channel insert points, they are not properly buffered outputs and are only just capable of driving a single input.

Cheers,

Andy

Hi Andy,
I have some doubt... 6 x 10kΩ in // = 1.7 kΩ I'm not confident with the output signal.
Cheers,
Pascal

[walrus]

5534's can drive 600 Ohm.

[radardoug2]

If you are worried, use an external device as a buffer. A spare compresser or eq.

[oyanliz]

Thanks for all the answers!!

Best regards to all of you!

Oihan

[jimlfixit]

Interesting read from you people. I have only got back home after trying to rewire a 40 year old SSL 6K for 11 days but more on that later including the damage done by mice or rats!.

Anyway, I was interested to read about the insert sends and returns by Andy Millar (hello by the way and get in contact).

I think 'Mults' are a German word for the parallels on the SSL patchbay. You only need to link the tips and screens as the tech earth ground (screen) is already joined or secured to the patchbay front panel and therefore to the console ground. As you may be mucking about with the pachbay, it may be worthwhile to do a few phase reversals as well, meaning tip goes to the ring and vice versa.

Not sure why you may need 5-6 parallels on the patch (which could affect the signal strength to each output, as has been suggested so, could you explain here so we all know and could maybe suggest an alternative?

[oyanliz]

Hi all,

My console has an extra patch row with separate DL connectors that I never have used. I have removed it and I am planning to use it in the atmos theater room we are building. The atmos room will be equipped with 34 speakers and must be suitable to 7.1 or 5.1 configuration. So all the signal will be reflected in the patchbay. 34 channel out to the speakers amps will be reflected in the patch and will be normaled to 34 input channels (for atmos). But when the configuration is changed to 7.1 or 5.1, Ls and Rs signal must be splitted (copyed) to 6 points and then patched to amps out points. Same for rear speakers, Ls (back) and Rs (back) must be splitter (copyed) to 2 points and then patched the same signal to amps out. So I was asking the question because I was figuring that it could be possible to use the moded patchbay, as the studio audio signal wiring is made using DL connectors.

Maybe there are better options to do this... but the idea is to use the wiring and thing that we already have stored here and there.

Thanks to all one time more.

Very best regards.

Oihan

[radardoug2]

So nothing to do with an SSL really. It sounds like you really need a custom unit which will change modes appropriately, with the necessary output drivers.
Perhaps you should rethink your plan and do some proper design for what you are trying to do.

[ULH]

Hi Oihan. In my opinion you need great flexibility (eq/delay) and great control/recallabilty when we are talking about monitor signal infrastructure in large scale atmos installs that need to take 7.1 and 5.1 into account. Also remember other monitoring sources like apple tv atmos content. That is not a job for a bantam pathbay. Have a look at DAD ax32 with spq card and DA cards and input from dolby atmos render/daw via madi (rme madiface for example). An alternative is Merging Technologies. I know these solutions are not cheap but large scale atmos is a costly affair. I am doing an install using ax32 here in Copenhagen at the moment. Do contact me if you would like to chat more about this stuff 

Best regards,
Uffe

www.frostboxlabs.com