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Author Topic: Brad - how's your new "Barry Porter" eq??  (Read 22462 times)

TotalSonic

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Brad - how's your new "Barry Porter" eq??
« on: February 19, 2008, 11:52:18 pm »

Hey Brad -
Was browsing on your site and noticed you're listing the custom eq from the Barry Porter design in place of where there used to be the Sontec.

How do you like it?  Any details you're willing to share?

Best regards,
Steve Berson

bblackwood

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #1 on: February 20, 2008, 07:40:32 am »

I absolutely love it!


This one's not really secretive, it's almost like a Davelizer with Q controls built in - very transparent but with an ever so slight euphonic coloration. Top end is very smooth and the bottom is great for adding a 'point' on the kick.


It was laid out so you can drop either standard 8 pin dip or API/990 style op-amps into it. The variety of opamps we originally chose have gone unchanged as so far, I've not found a weakness to address.


It's really a lot of fun to use and I'm thrilled with how it came out!


Here's a couple of pics:




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Brad Blackwood
euphonic masters

Viitalahde

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #2 on: February 20, 2008, 10:43:37 am »

Hey, I like that!

One of the future projects is to build another parametric EQ, and instead of re-building the current one with modifications, this design could be well worth exploring to. I first saw the design years ago, then forgot about it completely until you guys talked about it.

And the low+high band go from shelf to bell, that is always good.

Well, got to put this one on the waiting list. Need to speakers.. A passive EQ should be coming up.. NTP limiters waiting to be racked..

EDIT: Bypass on the front panel? Thought you had them in your console. Or have you ran out of inserts?
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Jaakko Viitalähde
Virtalähde Mastering, Kuhmoinen/Finland
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bblackwood

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #3 on: February 20, 2008, 10:58:51 am »

Viitalahde wrote on Wed, 20 February 2008 09:43

EDIT: Bypass on the front panel? Thought you had them in your console. Or have you ran out of inserts?

No, not out of inserts, but thought it a smart idea to include in case I ever do.
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Brad Blackwood
euphonic masters

Bob Boyd

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #4 on: February 20, 2008, 11:28:29 am »

I'm not sure but if I look closely at the pictures, I think I can make out the words  "Funk Logic"...
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Bob Boyd
ambientdigital, Houston

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TotalSonic

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #5 on: February 20, 2008, 12:57:18 pm »

bblackwood wrote on Wed, 20 February 2008 07:40

I absolutely love it!

This one's not really secretive, my tech can build one for anyone  interested enough (PM me for his info, but don't call to kick tires). It's almost like a Davelizer with Q controls built in - very transparent but with an ever so slight euphonic colorations. Top end is very smooth and the bottom is great for adding a 'point' on the kick.

It was laid out so you can drop either standard 7 pin (API) or 990 style op-amps into it. The variety of opamps we originally chose have gone unchanged as so far, I've not found a weakness to address.


Thanks much for the info.

Do you know what opamps you went with?  Did you test a lot of different things?

Quote:


It's really a lot of fun to use and I'm thrilled with how it came out!


Very cool.

Does anyone know what the link to the pdf with the schematics is?  I couldn't find it yet with a quick Google search.

Best regards,
Steve Berson

jdg

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #6 on: February 20, 2008, 01:10:30 pm »

IIRC, the trident "A range" console EQs are the barry porter design. no?

the TFPro P9 is based on it.   i had the P9, i know its sound, but never a trident.  does your EQ brad sound like the P9?


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john mcCaig
-Mothery Earworks Clarifold Audipure

bblackwood

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #7 on: February 20, 2008, 01:32:14 pm »

jdg wrote on Wed, 20 February 2008 12:10

IIRC, the trident "A range" console EQs are the barry porter design. no?

the TFPro P9 is based on it.   i had the P9, i know its sound, but never a trident.  does your EQ brad sound like the P9?

No idea, but I doubt it sounds like much anything else - my understanding is that this was his final "ultimate EQ" design before his passing.

Certainly much of it is about implementation and my tech is stellar at understanding this, but the circuit itself isn't very colored from what I can tell.

I don't recall exactly which opamps were finally settled upon and can't find the schematic right now, but I'll see if i can scare it up when i have time.
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Brad Blackwood
euphonic masters

bblackwood

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #8 on: February 20, 2008, 01:44:43 pm »

OK, I found a post in Bruno's forum where DC posted the schematic: http://recforums.prosoundweb.com/index.php?t=rview&goto= 213353&th=15104
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Brad Blackwood
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zmix

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #9 on: February 20, 2008, 06:04:43 pm »

jdg wrote on Wed, 20 February 2008 13:10

IIRC, the trident "A range" console EQs are the barry porter design. no?

the TFPro P9 is based on it.   i had the P9, i know its sound, but never a trident.  does your EQ brad sound like the P9?





John,
You are correct, same Barry Porter.
This EQ is quite different than his original Trident A-Range / TFPro P9 topology.

This one is based on a state variable active filter, and as such, has no transformers, inductors or discrete gain stages....you'll love it!!

jdg

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #10 on: February 20, 2008, 07:41:21 pm »

then i may need to some spare funds.


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john mcCaig
-Mothery Earworks Clarifold Audipure

lowland

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #11 on: February 21, 2008, 10:33:53 am »

The good people at Hiltongrove mastering in the UK are proud possessors of a Barry Porter mastering EQ, built I believe by Barry 'hisself'. It's the 2U blue beastie in the rack pictures on their website.

http://www.hiltongrove.com/hiltongrove_mastering.htm
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Nigel Palmer
Lowland Masters
Essex, UK
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JGreenslade

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #12 on: February 21, 2008, 03:06:09 pm »

Brad - if you don't mind me asking, which type of rotary switch did you go for? You didn't go for Shallco I assume  Shocked   Grayhill? Elma?

Is there anyway I could bribe you into releasing the Gerber files? I'm very interested in building one of these animals, and I'd like to do it with an op-amp designed by an associate. The op-amp is pin-compatible with the TL071, but has a much, much larger physical footprint... I'm guessing any Gerber would need a fair amount of re-jigging to accommodate Mr P's op-amp, but at least it'd give a basis to start on.

It's always good to see Barry Porter getting recognition - albeit posthumously.


Justin
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bblackwood

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #13 on: February 21, 2008, 03:19:00 pm »

No, passed on the Shallcos for this one or the unit would have had to be at least 4RU, and I can't afford that amount of real estate any more! These are both Elmas and Grayhills.

My tech poured a TON of time laying out these boards, so I doubt he'll give the gerber files away. You could have him modify them for you perhaps? I dunno - PM me for his contact info...
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Brad Blackwood
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JGreenslade

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Re: Brad - how's your new "Barry Porter" eq??
« Reply #14 on: February 22, 2008, 08:05:03 am »

That's a kind offer, Brad.

I suspect the PCB will need a lot of re-jigging to accommodate the op-amp I have in mind, and I also have a couple of ideas for other changes, so I will finalise these ideas before contacting your Tech. If you speak to him in the meantime, you could ask him how much work he reckons will be involved to convert the PCB to work with a TL071-pinned DOA.

It looks like a few people here are building these EQs - in a few months time it should be fascinating to compare builds.


Justin
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