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  #1  
Old 09-17-2012, 09:07 AM
Pern Pern is offline
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External 19" EQ and FX Send/Receive unit to be used with any mixer in progress.

I'm at the moment working on a 19" 2U external unit to add more functionality to my mixer. But i'm designing it so that it can be used with any mixer. Mixers with
Phono in only channels need Line Level cards on these to be used with the unit.

The goal is to have per channel EQ and external FX Send/Receive access on any of the mixer channels. Also to add more Phono inputs to mixers that needs it.

Inputs: 4 or 6 channels. Phono or Line.
EQ: 3 or 4-Band, -26dB - +6dB.
External FX unit inserts with DRY/WET function: 2
FX1 and FX2 also have an extra FX insert each to add even more functionality to them.

You connect the Turntables/CD-players etc. to it and then from it to the mixers line level inputs. For each FX section only one input channel can be used at the time.
This since it routes the input signal to the EQ and selected external FX-Units.

Why this design approach and not a traditional EQ per channel ?
- EQ/FXs are added to the signal path only when needed. This for optimized SNR and THD.
- Easy/cheap to extend with more functionality via FX1 and FX2 Insert loops.
- It can be used with mixers that doesn't have a FX-Loop.
- This is much cheaper to build and give the same functionality.
- Smaller enclosure can be used. A 3-Band EQ / 1 Ext. FX version could fit in a 1U enclosure.

When it's finished it will be released both as DIY and built unit.



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Last edited by Pern : 09-17-2012 at 11:47 PM.
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  #2  
Old 09-18-2012, 02:00 AM
Pern Pern is offline
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Example of the concept in a 1U - 4 input ch version.




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Last edited by Pern : 09-18-2012 at 03:13 AM.
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  #3  
Old 09-18-2012, 12:05 PM
Disko Ole Disko Ole is offline
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This is great Pern, exactly what I wanted when I asked you if you had anything like this in your plans some time back. I was gonna suggest a 1U version, but I see you've added that yourself!
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  #4  
Old 09-18-2012, 01:05 PM
Pern Pern is offline
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I also think that the 1U version is the most interesting. And with a 3-band EQ i might even be able to fit my new variable HPF/LPF filter in it.

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  #5  
Old 09-18-2012, 02:51 PM
renegadebliss renegadebliss is offline
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Pern,

THANK YOU for having both DIY and Built units!

And what's your rough time frame? Are you putting one out this year? Or is it going to be next year?

Thanks,
Dave

Last edited by renegadebliss : 09-18-2012 at 09:05 PM.
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  #6  
Old 09-18-2012, 11:16 PM
Pern Pern is offline
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Released early next year. And a couple of prototypes done this year.

But this is not a hard thing to design (i got most of the individual parts already), it's more a concept idea of how to connect and use things than rocket science.
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Last edited by Pern : 09-18-2012 at 11:44 PM.
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  #7  
Old 09-19-2012, 02:43 AM
renegadebliss renegadebliss is offline
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Quote:
Originally Posted by Pern
Released early next year. And a couple of prototypes done this year.

But this is not a hard thing to design (i got most of the individual parts already), it's more a concept idea of how to connect and use things than rocket science.

Hi,
Thanks for your quick update. I knew there would be time from design to release, as you are really designing two lines (DIY and Pre-Built) so just wanted to get an idea of how long that might.

Thanks again!

Dave
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  #8  
Old 09-19-2012, 02:55 AM
Pern Pern is offline
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The goal is to release the pre-built version around mid-January. DIY after that.
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  #9  
Old 09-19-2012, 11:36 AM
John-Martin John-Martin is offline
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Pern, do you have any plans to a DJ crossover at some point?
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  #10  
Old 09-19-2012, 10:57 PM
Pern Pern is offline
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A ISO ?

I started that project a long time ago and it's about 70% finished. It's very high on the Todo-list for early next year.
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  #11  
Old 09-20-2012, 12:29 AM
John-Martin John-Martin is offline
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Quote:
Originally Posted by Pern
A ISO ?

I started that project a long time ago and it's about 70% finished. It's very high on the Todo-list for early next year.

No. A DJ crossover like the RLA/GSA x3000. Basically one input and three outputs: one sub-bass, one full range, and one high pass at 8k-10k. This sale page can probably explain it better than I can.

http://www.realproaudio.com/Rane-AX3...ereo-crossover
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  #12  
Old 09-20-2012, 12:56 AM
Pern Pern is offline
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Not at the moment, but i will check it and see how much work it is.
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Last edited by Pern : 09-20-2012 at 01:08 AM.
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  #13  
Old 09-22-2012, 01:28 PM
Lime Twig Lime Twig is offline
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Another exciting-looking project, Pern!

So, where does the phono-amp stage come in? Do you need to use external pre-amps or are they integrated into this unit?
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  #14  
Old 09-24-2012, 05:00 AM
Pern Pern is offline
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Phono amps are built in.
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