Yeah, why not? :grin:
I was not sure about posting it here since it is not all *real* DIY. I used mostly common components form the 80's radio era in germany; and you guys brought me to the idea since I had no idea about 475s before I read your articel and I was seriously thinking about buying a new summing device since I just sold my desk.
So the first statement: it sound stunning! I am really happy with the sound reg. it's resolution and roomy depth. Breathtaking!
The problem is that we have to convert after the analog chain to digital which is - even if it is done by one of the best converters available - still a breakdown in spaciness and depth and overall presence of even the not so loud signals.
A LOT get's lost when returning to digital.... when some has experience with some better A/D converters than Rosetta: please feel free to tell me.... :wink:
OK- back to the device:
What you see on the photo is a 32-in-2 summing device consisting of a Neumann 475, Neumann Power Supply ( though I had to build an 27,5 V AC converter on my own, well THAT is DIY! )
two Telefunken splitters and two relais cards plus another relais card with dampening resistors.
So what is this good for?
Well, I was thinking of having some more opportunities despite just summing 32 channels.
What I liked mostly about my previous console before selling was the easy soloing and muting it offered.
Therefor I used 4 switches for muting 4x 8-groups which still gives me flexibility for listening e.g. drums, effects, vocals, instrument groups soloed.
Since the last 8-group of channels was thought to be for FX I run them through a dampening relay section which damps them down -15 dB by default. When adjusting the reverb sound I want to hear it loud therefore it is switchable for two stereo returns.
Two Mono switches allow channels 1-4 to be mono. Enough for BD/SN/BASS/Vocals. Solved by laying a parallel signal lead before the 5k1 resistors on the summing chain.
Then there is a insert path for the stereo sum which allows to bypass inserted compressors/signal processors.
Well, that's it... :wink:
The funky stuff was the wiring and soldering on the relais cards since the legs are very close together.
Couldn't be happier - just wann go for a *real* SSL summing comp now. (it never stops, but I guess you know)
P.S. the dampenig card with the carbon potentiometers was crap. I soldered some 1% tolerance resistors directly on the multi-switch.
(BTW: the summing resistors are 0.1 % . I think I can hear it...
)