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Author Topic: Any DIY EQ interest?  (Read 43196 times)

compasspnt

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Re: Any DIY EQ interest?
« Reply #120 on: December 29, 2007, 07:22:02 pm »

Will be watching with interest.

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Gold

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Re: Any DIY EQ interest?
« Reply #121 on: December 29, 2007, 07:49:10 pm »

David Glasser wrote on Sat, 29 December 2007 19:06

But only if it has blue LEDs.



I agree. There should be a blue LED on/off switch. Perhaps we should install a meter to monitor the LED current.
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Paul Gold
www.saltmastering.com

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Larrchild

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Re: Any DIY EQ interest?
« Reply #122 on: December 29, 2007, 08:08:21 pm »

To get a basic idea of how a resistor, coil and capacitor make an EQ, go here and fiddle with the "f=" slider.
http://www.ngsir.netfirms.com/englishhtm/RLC.htm
Then change some other part values and watch the curves change.
Notice the "Q" change when you adjust "R".
You may notice both "C" and "L" change the frequency of the filter.
It's the phase shift that's important. Where it says; "I leads V" and "V leads I".
For identical curves, one phase shift will usually sound better than the other.
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Larry Janus
http://2ubes.net

present

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Re: Any DIY EQ interest?
« Reply #123 on: December 30, 2007, 05:17:11 am »

I really need to catch up on the technical side of things but I'm very interested.
Now, it will have a switch that goes 'ping' right?
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Viitalahde

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Re: Any DIY EQ interest?
« Reply #124 on: December 30, 2007, 05:42:44 am »

I have new L/C EQ plans of my own, but I had my coils custom wound by an Austrian guy.. Very HQ Ni-Fe cores, good stereo matching. Maybe he could help you with the coil needs if that isn't sorted.
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Jaakko Viitalähde
Virtalähde Mastering, Kuhmoinen/Finland
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Greg Reierson

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Re: Any DIY EQ interest?
« Reply #125 on: December 30, 2007, 10:39:30 am »

David Glasser wrote on Sat, 29 December 2007 18:06

I'm in.

But only if it has blue LEDs.




Is that why Brad doesn't have a Great River EQ?


GR
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mastertone

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Re: Any DIY EQ interest?
« Reply #126 on: December 30, 2007, 12:46:22 pm »

this sounds like fun Cool
count me in!
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Jonas Ekstrom
Mastertone Mastering
www.mastertone.se

Peter Beckmann

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Re: Any DIY EQ interest?
« Reply #127 on: January 07, 2008, 04:54:35 am »

A little late to the thread, but sounds like fun.

PB
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Peter Beckmann
Technologyworks
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RMoore

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Re: Any DIY EQ interest?
« Reply #128 on: January 07, 2008, 06:43:04 am »

DIY passive mastering EQ that will bring joy into the user's lives?

Watching with interest - good luck people!
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People's Republic of Ryan

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jason goz

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Re: Any DIY EQ interest?
« Reply #129 on: January 07, 2008, 08:46:34 am »

If this eq can have stepped cut and boost controls then i'm in
Jason

mastertone

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Re: Any DIY EQ interest?
« Reply #130 on: April 01, 2008, 04:12:45 pm »

So, any news on this one?

/Jonas
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Jonas Ekstrom
Mastertone Mastering
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bblackwood

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Re: Any DIY EQ interest?
« Reply #131 on: April 03, 2008, 03:14:09 pm »

Well, I'm still trying to figure out how to do this in such a way as to make it DIY-able. Not really very easy as my tech most certainly does NOT want to be a hand-holder through the process...
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Brad Blackwood
euphonic masters

bblackwood

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Re: Any DIY EQ interest?
« Reply #132 on: April 03, 2008, 03:14:10 pm »

Well, I'm still trying to figure out how to do this in such a way as to make it DIY-able. Not really very easy as my tech most certainly does NOT want to be a hand-holder through the process...
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Brad Blackwood
euphonic masters

bblackwood

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Re: Any DIY EQ interest?
« Reply #133 on: April 09, 2008, 01:47:04 pm »

Ok, this is cool - I had two guys volunteer to bang on the design a bit and also support those who need it during the build process, so I met with my tech today and we went over the basics. to keep this simple (and keep it as affordable as possible), we decided to skip the inductors, so it's shelf only, will allow for boost and cut at variable frequencies. Will have a solid state buffer and makeup amp, so interfacing won't be an issue. This should result in a very clean and transparent EQ that's good for overall shaping.

Obviously if you want something more complex, it's up to you, but this will be the basic design. We can have a mod thread if people want to...

More to come...
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Brad Blackwood
euphonic masters

David Glasser

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Re: Any DIY EQ interest?
« Reply #134 on: April 09, 2008, 01:57:25 pm »

Brad,

See if you can configure it so the gain stage can be a 2520/990/Forsell form factor.
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David Glasser
Airshow Mastering
Boulder, CO

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