dmp

Quote
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

Quote
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.  ;)
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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.
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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.
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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 ?

Any new news??? :)

Jeff,

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

Chris
"Kind of like going into Safeway at 4 in the morning and chugging a beer in the produce section; been there, done that." - CJ

"We're not making an atomic bomb, just cooking a few electrons." - PRR


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.
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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.
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Update?
"Kind of like going into Safeway at 4 in the morning and chugging a beer in the produce section; been there, done that." - CJ

"We're not making an atomic bomb, just cooking a few electrons." - PRR

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.  8)
http://www.fixaudiodesigns.com
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OK Jeff, understand. We'll see what Paul comes up with.

Thanks!
"Kind of like going into Safeway at 4 in the morning and chugging a beer in the produce section; been there, done that." - CJ

"We're not making an atomic bomb, just cooking a few electrons." - PRR

Joechris

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

musicians vary +/-9dB depending on mood, drugs, and line-voltage. (PRR)

update...?  8)

jsteiger

update...?  8)
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.....
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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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