3nity
Well-known member
Tat...are you done with that? i see you went active...i have a C-control too but it add something to the mix that i don't like......i was thinking that the best way to go would be passive using relays?? what you think?
DIY - Active Monitor Controller !!!
- Thread starter Purusha
- Start date
Help Support GroupDIY Audio Forum:
Purusha
Well-known member
Yes, I am basically done with my version. It has still some clicking problems but I am anyway changing it for the new CRM DIY version designed by Igor.
I have never done any tests compared to the signal going through and bypass the C-control. So you say it effects the sound?
It will be soon available here in KIT version together with my cases.
This one will kick ass :thumb:
I have never done any tests compared to the signal going through and bypass the C-control. So you say it effects the sound?
It will be soon available here in KIT version together with my cases.
This one will kick ass :thumb:
3nity
Well-known member
yep it add distortion to the mix...
Purusha
Well-known member
Interesting. Did you do A/B tests?
I was planning to fix my version and sell it for material cost anyway.
It's not bad at all for around 250€ only.
I was planning to fix my version and sell it for material cost anyway.
It's not bad at all for around 250€ only.
3nity
Well-known member
Nope i had it for 2 years with me and yesterday i needed in the sesion cuz i needed to hear some MP3 from an ipod and and needed an extra headphone plug and i had to pull it to the rescue but i ended being embarrased by how bad it was sounding.....the speaker volume need to go all the way to sound like my 002 Monitor out... 
That's why i'm in search for something to controll 2 pair of speakers stero/mono switch and it has to have 3-4 Headphone outs...
..
That's why i'm in search for something to controll 2 pair of speakers stero/mono switch and it has to have 3-4 Headphone outs...
..
Purusha
Well-known member
Than just wait for the new CRM KIT. It's like Avocet quality for little money.
Zee1usa
Well-known member
I may be interested in a kit. Rack mounted would be Great !
3nity
Well-known member
Tat where are the schematics to the one you're doing?
Purusha
Well-known member
Schematics are nowhere and everywhere :grin: I made my own design
with relays and used C-control for the attenuation.
Zee, it will be 2U rack mounted with remote controller. Nice design :thumb:
Igor will show soon how the thing looks. I just made some racks for him :wink:
with relays and used C-control for the attenuation.
Zee, it will be 2U rack mounted with remote controller. Nice design :thumb:
Igor will show soon how the thing looks. I just made some racks for him :wink:
radiance
Well-known member
I guess you guy's form a great team :grin:
Can't wait to have a peek at this monitor thingy.....Is it the same one as Igor posted previously?
Can't wait to have a peek at this monitor thingy.....Is it the same one as Igor posted previously?
Purusha
Well-known member
Yeah, we became really good team. :wink:
I think this CRM is a younger brother of the one you saw recently.
I think this CRM is a younger brother of the one you saw recently.
Hey guys!
Lemmie finnish 33609's pcb's and we'll talk about this project.
For now, this is 5th version of pcb's and people who
bought from me these controllers and using them in the studios
are very happy, btw, 2nd version of this project was issued more tnan a year ago and since about 10 controllers were sold.
You can see 1st version there:
http://www.groupdiy.com/index.php?topic=17757
http://img.photobucket.com/albums/v436/IJR/12082006012.jpg
and second version is there:
http://www.groupdiy.com/index.php?topic=18346
Lemmie finnish 33609's pcb's and we'll talk about this project.
For now, this is 5th version of pcb's and people who
bought from me these controllers and using them in the studios
are very happy, btw, 2nd version of this project was issued more tnan a year ago and since about 10 controllers were sold.
You can see 1st version there:
http://www.groupdiy.com/index.php?topic=17757
http://img.photobucket.com/albums/v436/IJR/12082006012.jpg
and second version is there:
http://www.groupdiy.com/index.php?topic=18346
dagoose
Well-known member
Just wondering... waht is the status right now?
I'm also in the middle of thinking about how to build a controller myself.
I need 3 inputs, at least two monitor outs with seperate sub, mono switch, LR mute switches and a BIG stepped knob.
Right now i'm using a SM pro M-patch which i do like, it's passive and has some nice features and it's cheap.
The only things i'm missing actually are seperate switchable outputs for my sub, a stepped attenuator (i want a fixed 83db spl step), a LR mute button and the knob is a bit to small (i know.. just add a bigger knob..).
I have opened the box some time a go but can't remember how the output pot was used, i'm using it balanced so it should be a 4 layer pot then but i think it was just stereo.
I will open it up again soon and have a closer look..
I'm also in the middle of thinking about how to build a controller myself.
I need 3 inputs, at least two monitor outs with seperate sub, mono switch, LR mute switches and a BIG stepped knob.
Right now i'm using a SM pro M-patch which i do like, it's passive and has some nice features and it's cheap.
The only things i'm missing actually are seperate switchable outputs for my sub, a stepped attenuator (i want a fixed 83db spl step), a LR mute button and the knob is a bit to small (i know.. just add a bigger knob..).
I have opened the box some time a go but can't remember how the output pot was used, i'm using it balanced so it should be a 4 layer pot then but i think it was just stereo.
I will open it up again soon and have a closer look..
dagoose
Well-known member
Couldn't resist it to open it up today.
I found it that they do use a 4pole pot for controlling the volume, quite nice!
For the rest it's really straigth forward, anyone here can guess how things work by looking at the pics and knowing what it can do.
I'm not sure about if i go balanced or unbalanced for the controller i want to build myself, only thing i know is that i want it relay based.
http://www.dagoosemusic.nl/temp/smpro/1.jpg
http://www.dagoosemusic.nl/temp/smpro/2.jpg
http://www.dagoosemusic.nl/temp/smpro/3.jpg
http://www.dagoosemusic.nl/temp/smpro/4.jpg
http://www.dagoosemusic.nl/temp/smpro/5.jpg
I found it that they do use a 4pole pot for controlling the volume, quite nice!
For the rest it's really straigth forward, anyone here can guess how things work by looking at the pics and knowing what it can do.
I'm not sure about if i go balanced or unbalanced for the controller i want to build myself, only thing i know is that i want it relay based.
http://www.dagoosemusic.nl/temp/smpro/1.jpg
http://www.dagoosemusic.nl/temp/smpro/2.jpg
http://www.dagoosemusic.nl/temp/smpro/3.jpg
http://www.dagoosemusic.nl/temp/smpro/4.jpg
http://www.dagoosemusic.nl/temp/smpro/5.jpg
nielsk
Well-known member
There is really not much to it. I have built several, just look at the SSL 4K schematics, the blocks are all there. Use a THAT line in chip to unbalance, you can use a 2 pole switch for source select, a 10K dual pot, buffer and a THAT balanced output. Mono sum no big deal either, pick a meter feed off the buffer out, done.....bread board the whole thing in an hour or so
synthi
Well-known member
Igor, Purusha, any updates on the CMR?
Synthi :green:
Synthi :green:
dagoose
Well-known member
[quote author="nielsk"]There is really not much to it. I have built several, just look at the SSL 4K schematics, the blocks are all there. Use a THAT line in chip to unbalance, you can use a 2 pole switch for source select, a 10K dual pot, buffer and a THAT balanced output. Mono sum no big deal either, pick a meter feed off the buffer out, done.....bread board the whole thing in an hour or so[/quote]
Yep, i know it's simple to build.
I'm going for a completely passive version, only thing i'm a bit confused about right now is the stepped output switch (so no potmeter), should i go balanced or unbalnaced? If i go balanced i need a 4 deck 12 or 24 pole switch (expensive and lot of resistor soldering) or unbalanced i need a 2 deck switch (a little less expensive and less soldering but this is unbalanced..)
Mono summing is also no problem so with the inputs and stuff.
Like i said, i want it passive with relays, i want nice smooth switches on the panel so that's why i want it relay based.
Like synthi said, any progess guys?
Yep, i know it's simple to build.
I'm going for a completely passive version, only thing i'm a bit confused about right now is the stepped output switch (so no potmeter), should i go balanced or unbalnaced? If i go balanced i need a 4 deck 12 or 24 pole switch (expensive and lot of resistor soldering) or unbalanced i need a 2 deck switch (a little less expensive and less soldering but this is unbalanced..)
Mono summing is also no problem so with the inputs and stuff.
Like i said, i want it passive with relays, i want nice smooth switches on the panel so that's why i want it relay based.
Like synthi said, any progess guys?
Hi!
I can offer you mastering quality controller project.
It has:
5 inputs, each can go to CUE or REC selector
3 speaker outputs
64 steps of 1dB level controll
Mono SUM, DIFF, L, R
DIM
Talkback
DIM, TB, each CUE IN, SPK OUT has user-adjustable TRIM value
(you just press trim+in1, set -3 dB, press trim again).
TB latches after you hold it >5 sec.
Fully balanced, passive, only metal film resistors and relays.
Any clicks on audio at all, if there's no DC offsets at source outs
(there's a little trick to do this).
About total cost of the project.
Case
50 relays
20 MEC switches (with led)
PCB's
Power supply
IC's, misc stuff
Connectors
It comes up to about EUR 350-450 total.
There's 2 audio pcb's (each for l or r channels),
relays receiver board, keyboard board, controller's PIC board.
Project is not simple at all.
Any interest after this?
I can offer you mastering quality controller project.
It has:
5 inputs, each can go to CUE or REC selector
3 speaker outputs
64 steps of 1dB level controll
Mono SUM, DIFF, L, R
DIM
Talkback
DIM, TB, each CUE IN, SPK OUT has user-adjustable TRIM value
(you just press trim+in1, set -3 dB, press trim again).
TB latches after you hold it >5 sec.
Fully balanced, passive, only metal film resistors and relays.
Any clicks on audio at all, if there's no DC offsets at source outs
(there's a little trick to do this).
About total cost of the project.
Case
50 relays
20 MEC switches (with led)
PCB's
Power supply
IC's, misc stuff
Connectors
It comes up to about EUR 350-450 total.
There's 2 audio pcb's (each for l or r channels),
relays receiver board, keyboard board, controller's PIC board.
Project is not simple at all.
Any interest after this?
synthi
Well-known member
Of course!! I`m in for one kit, maybe two!
Any idea for the timeline? I`m setting the new studio and since this will be the main part I`m a bit hurry...
Synthi :thumb:
Any idea for the timeline? I`m setting the new studio and since this will be the main part I`m a bit hurry...
Synthi :thumb:
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