[dmp]

Mono summing is done inside the 625CR module.

How is the summing to mono done?

This will be a great deal. There isn't much like this in diy.

[jsteiger]

Mono summing is done inside the 625CR module.

How is the summing to mono done?

It is very simple and nothing new really. I use 3 active stages in the 625CR. The mono summing is simply combining the outputs of the first stage opamps thru 330 ohm precision R's and then into the inverting inputs of the 2nd stage opamps. The DIM resistor array is just before the mono summing R's.

The L/R on-off and stepped level control are handled between stages 2 and 3.

Speaker select D is a single speaker mono output, so a completely different function than the above mentioned mono summing. For this, I take the output of both balanced line drivers and combine them thru 1k precision R's.

FWIW, I am very proud of this module. It is totally bad azz. 

[dmp]

Yes, this is awesome! Nice work.
As to the size, for a standalone I can see combining it in a 3U rack with meters and a talkback controller.

[jsteiger]

As to the size, for a standalone I can see combining it in a 3U rack with meters and a talkback controller.

Yes, this is exactly one of the options I will have available.....one day.

[clister01]

Hey Jeff,

Is that mono speaker D select switch latching? ie... used for a sub with one of the other speaker pairs? Homerun if so...

[jsteiger]

They are interlocked but can be pressed simultaneously (pseudo all buttons in!). I am also sure the switchbank could be modified so that D switch was independent and latching. I have not taken one apart but I think Hairball Mike has. They are the same make as what he supplies with his 1176 kits.

[.:On The Rock:.]

Don't let the dream die! This is exactly what I'll be after in a few years... I'm gonna start saving now!

[simrfid]

Hi Jeff ! Is there any news on this control room module ?

[magnified]

Any new news???

[fazeka]

Jeff,

You must be busy with the store/business! Can't wait to see more news from you on this.

Chris

[jsteiger]

Yes the store keeps me very busy. I have not worked on this in ages. It is fully on the back burner right now.

[qmp audio]

Any plans to let the control room module out into the wild?

[jsteiger]

Yes but I just haven't had the spare time. The comp has taken the front seat the last few months.

[fazeka]

Update?

[jsteiger]

Update?

Honestly, I have not worked on it in ages. I have been way too preoccupied with normal store duties, especially the last few months. Plus we are prepping to move to Nashville next spring.

I may abandon the idea since Paul Wolff is on task with his FIX console. 
http://www.fixaudiodesigns.com

[fazeka]

OK Jeff, understand. We'll see what Paul comes up with.

Thanks!

[Joechris]

I belive a 500 series modular console is the way to go in these hybrid mixing times...
There´s gonna be more of them out there... but we want the 625CR!!
...hope you find the time Jeff.

[fragletrollet]

update...? 

[jsteiger]

update...? 

Its the same as my last post a few up from here. I have a 32x4 summing mixer proto floating around town that I will likely bring to market before an actual console. I simply don't have enough hours in the day or days in the week.....

[Blackdawg]

Its the same as my last post a few up from here. I have a 32x4 summing mixer proto floating around town that I will likely bring to market before an actual console. I simply don't have enough hours in the day or days in the week.....

Oh my god i would be SO down for this!!

Already drawing up making a large hybrid system using your 11slot 500 buckets.

This would be very cool.

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