DIY – 12 to 2 – Passive Analog Summing Panel.
« on: November 17, 2009, 10:15:20 AM »
Being a DIY novice, I wanted to make myself a nice little passive summing panel for my home rig out of parts laying around the shop. I wanted to simplify/improve my final summing stage. Pleased with the results, Sounds great. Gives me piece of mind bypassing the channel IC’s & master section on my Sony MXP desk.

 I used a simple XLR panel, Neutrik XLR mounts, Neve super conductive cable, & OHMITE 1% metal film resistors. Took all of 2 hours to wire up.

 10.7k resistors on the inputs & a 220 shunt on the outputs.

 After level calibration my noise-floor is at -80 & crosstalk @ -88.

 FYI – this is with a John Hardy M1 transformer pre for the make up gain. Nothing better IMHO.

 
 
 
 
« Last Edit: November 17, 2009, 10:20:44 AM by rhythminmind »
"Any experiment of interest in life will be carried out at your own expense."


skipwave

Re: DIY – 12 to 2 – Passive Analog Summing Panel.
« Reply #1 on: November 17, 2009, 08:56:41 PM »
Nice work! I did basically the same thing some years ago. 8 stereo inputs summed to two mic-level outs. It was eye opening the difference it made.

In the next couple months I'll be building up a small line-mixer with basic controls and using a pair of DIY 990s for summing amps.
Quote from: PRR
Now, maybe you don't, or shouldn't, grab the ribbon for far-harpsichord, nor the hot condenser for snare-kissing... yet often we do.

Silvas

Re: DIY – 12 to 2 – Passive Analog Summing Panel.
« Reply #2 on: November 17, 2009, 09:24:01 PM »
I used to have the Hardy M1 for makeup after my passive summing box, and loved it. Until i needed the i/o for my GSSL´s and other projects i´ve built since i joined the forum !

It was beautiful.

Camilo Silva F.
Camilo Silva F. Mastering
Chia, Colombia

Re: DIY – 12 to 2 – Passive Analog Summing Panel.
« Reply #3 on: November 17, 2009, 10:48:58 PM »
I've been researching what it will take for DIY pair of 1176's & the GSSL. Would love them for the drum bus. I have a Toft DC-2 FET comp i'm using for the drum buss at the moment. Being the drummer I am I like to feed my comp addiction. So far 18+ channels of hardware compression and counting.
"Any experiment of interest in life will be carried out at your own expense."


 

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