hugo

Project : gssl and dla-2a in the same chassis
« on: March 01, 2019, 06:48:03 AM »
Hi,
I am launching a project because i have this "mixbuzz" and dla2a pcbs here, and some blank chassis, spares, etc...
In my mind, chaining 2 pcbs inside a common chassis is the same as chaining 2 units with xlrs, but maybe i am wrong..?

- Could i connect the out xlr Hot and cold straight to the input of the dla2a pcb ?
- Could i connect both torroidals to the same IEC inlet ?
- How to implement a switch for swapping the 2 units in the chain ?

Thanks all


Script

Re: Project : gssl and dla-2a in the same chassis
« Reply #1 on: March 01, 2019, 11:11:03 AM »
Why would you want to do that? It's a bit like owning two  bicycles and liking to ride them both -- and then thinking about welding them together. Is it for cost?

living sounds

Re: Project : gssl and dla-2a in the same chassis
« Reply #2 on: March 01, 2019, 11:51:46 AM »
Yes, these are vastly different units, makes no sense.

I have put two GSSL in a 2U chassis, since they can share a PSU.

pucho812

Re: Project : gssl and dla-2a in the same chassis
« Reply #3 on: March 01, 2019, 11:59:14 AM »
Can it be done? If you have the space inside a chassis to fit it all, it can be done.  It does not mean that you should do it.  What is the purpose of such an endeavor?
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

hugo

Re: Project : gssl and dla-2a in the same chassis
« Reply #4 on: March 01, 2019, 12:32:45 PM »
Why would you want to do that? It's a bit like owning two  bicycles and liking to ride them both -- and then thinking about welding them together. Is it for cost?
Thanks for your support.
You all seems affraid by my idea, but the shadow hills mastering compressor is actually the same thing...  also, i love more 2 soft compressions than 1 hard, and vca + opto makes sense. Àd yes i have plenty of space i used a remaining chassis there.  Also seen here : https://m.youtube.com/watch?v=ZJGy-_4UONU

pucho812

Re: Project : gssl and dla-2a in the same chassis
« Reply #5 on: March 01, 2019, 12:47:26 PM »
Thanks for your support.
You all seems affraid by my idea, but the shadow hills mastering compressor is actually the same thing...  also, i love more 2 soft compressions than 1 hard, and vca + opto makes sense. Àd yes i have plenty of space i used a remaining chassis there.  Also seen here : https://m.youtube.com/watch?v=ZJGy-_4UONU

We are not afraid of your idea. What you misunderstand is you want to combine a tube circuit and a solid state circuit in a box.  while yes the shadow hills compressor is a VCA and an OPTO it is not a tube circuit + a solid state circuit. You will also find that the VCA portion of the shadow hills is not a GSSL by a long shot. It is it's own thing just uses a VCA.  The same goes for the OPTo side of the shadow hills, it is not an LA2A tube circuit, just a solid state tube circuit.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

hugo

Re: Project : gssl and dla-2a in the same chassis
« Reply #6 on: March 01, 2019, 01:34:53 PM »
We are not afraid of your idea. What you misunderstand is you want to combine a tube circuit and a solid state circuit in a box.  while yes the shadow hills compressor is a VCA and an OPTO it is not a tube circuit + a solid state circuit. You will also find that the VCA portion of the shadow hills is not a GSSL by a long shot. It is it's own thing just uses a VCA.  The same goes for the OPTo side of the shadow hills, it is not an LA2A tube circuit, just a solid state tube circuit.

I agree 100% . So why the tube/solid mix could be an issue ? Or is it just a strange idea ?

Script

Re: Project : gssl and dla-2a in the same chassis
« Reply #7 on: March 02, 2019, 01:04:34 PM »
Just more flexible as two separate units. Could patch in an EQ between them, for example.

pucho812

Re: Project : gssl and dla-2a in the same chassis
« Reply #8 on: March 02, 2019, 01:09:15 PM »
I agree 100% . So why the tube/solid mix could be an issue ? Or is it just a strange idea ?

space in the chassis to fit it all.   is all I got as a problem.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Script

Re: Project : gssl and dla-2a in the same chassis
« Reply #9 on: March 02, 2019, 07:41:09 PM »
Relays for swapping order.


hugo

Re: Project : gssl and dla-2a in the same chassis
« Reply #10 on: March 02, 2019, 09:20:54 PM »
Relays for swapping order.

would you have some ref for a such purpose ?  So 1 relay for input, 1 relay for output conected to the same switch would be a good idea ?

hugo

Re: Project : gssl and dla-2a in the same chassis
« Reply #11 on: March 06, 2019, 08:01:52 AM »
Ok i finished the first floor, and i have a question about metering.
How to display the total compression of 2 different modules on a single meter..? Is it possible easily ?
Thx

gyraf

Re: Project : gssl and dla-2a in the same chassis
« Reply #12 on: March 06, 2019, 08:50:22 AM »
no, not in any easy way - you may notice that GSSL calls for a DC-reading 1mA meter, where the LA2 wants a AC-reading VU-meter..

That said, you can always do your own compromise between scales, readings, and calibration
..note to self: don't let Harman run your company..

hugo

Re: Project : gssl and dla-2a in the same chassis
« Reply #13 on: March 06, 2019, 09:59:56 AM »
no, not in any easy way - you may notice that GSSL calls for a DC-reading 1mA meter, where the LA2 wants a AC-reading VU-meter..

That said, you can always do your own compromise between scales, readings, and calibration

Yes i have some buffers pcbs to use, i think it can make them matching.  The problem is to display the total gr, i dont know if the shadow hills has got this option

pucho812

Re: Project : gssl and dla-2a in the same chassis
« Reply #14 on: March 06, 2019, 04:19:44 PM »
The shadow hills metering options are to meter GR on either compressor or output level. It does not do a sum, total  of GR at any time.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Script

Re: Project : gssl and dla-2a in the same chassis
« Reply #15 on: March 07, 2019, 02:49:04 AM »
Relays. I'd say that depends on what you need / want.

- overall balanced or unbalanced
- hard bypass per unit
- hard bypass of entire double unit

You might look for inspiration here ('insert switcher' developped by majestic12 from this forum) to get an idea.

http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=7&t=797

Good luck. And please report back when unit is finished.


 

Related Topics

  Subject / Started by Replies Last post
26 Replies
12024 Views
Last post August 05, 2004, 11:25:14 PM
by Sleeper
3 Replies
1042 Views
Last post February 14, 2010, 06:09:33 PM
by pietro_moog
5 Replies
1727 Views
Last post April 09, 2010, 01:22:51 PM
by tv
2 Replies
917 Views
Last post November 15, 2011, 09:01:36 PM
by Ego Tripper