Search found 5449 matches

by mediatechnology
Sun Apr 18, 2010 3:04 pm
Forum: Document
Topic: MicMix MasterRoom XL-305 Schematics and Manual
Replies: 2
Views: 27831

Re: MicMix MasterRoom XL-305 Manual

I've been asked to provide the MicMix Master Room XL-305 reverb manual. I finally found a preliminary copy: https://www.ka-electronics.com/images/pdf/MicMix_Master_Room_XL-305_Manual.pdf (6.2 MB) In going through some scrap paper at my Mom's house I found hand-written ad copy. Apparently I must have...
by mediatechnology
Sat Apr 17, 2010 12:45 pm
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

Since I am arguing that a lower output termination is generally harmless and could even deliver lower input noise... That's one of the things I strived for in the DN-140 pads: To keep the impedance seen by the preamp low when the pad was engaged. With an open-circuit input and high gain (the showro...
by mediatechnology
Sat Apr 17, 2010 11:58 am
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

Note my edit where I missed typing "2" for 20 dB. Yeah I can't think of a single reason to go deeper than 20 dB. But maybe there is. On SSL's 4K/6K pad it looks like they used an optional 4th resistor (R3?) in the switch network to maintain the termination impedance for pad depths in which...
by mediatechnology
Sat Apr 17, 2010 9:49 am
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 619893

Re: Mid Side M-S Matrix Uses No Precision Resistors

I think that in conjunction with dynamics or EQ processing having level trims in the MS domain - a "make-up" gain - would be useful.
by mediatechnology
Fri Apr 16, 2010 5:39 pm
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

The pads in the THAT1570 DN-140, which are switchable (0 or -x dB), are constant load. They're 20, 15, 13.6 and 10 dB. I don't recall if we settled on 2K or 3K termination. IIRC it was 2K. (Been awhile since I read it and other people changed it considerably.) To make it all of the above would requi...
by mediatechnology
Thu Apr 15, 2010 7:15 pm
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 619893

Re: Mid Side M-S Matrix Uses No Precision Resistors

I think the point is, in mastering, to break the L/R into M/S so you can alter the "crosstalk." (Or image.) The only justification for the precision mode is for bypass so you can compare it before to what you've done after without the matrix itself altering the "before" and to mi...
by mediatechnology
Tue Apr 13, 2010 9:57 am
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

Bruno2000 wrote:I like 20 dB pads. Gets you out of trouble in a hurry. My $0.02.
Bruno2000
I agree. If you have a 10 or 15 dB dB pad and it's not enough then what do you do? You're kinda boxed in to unpatching and inserting an additional in-line.
by mediatechnology
Tue Apr 13, 2010 6:59 am
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

Trivia: the Mackie uses the same amp for both preamp and line, and I am remembering the only practical difference (ignoring the differences for phantom power) is the addition of (2) 5-7Kish series resistors inline for the line input. I don't believe it is actually a U-pad. I think those series resi...
by mediatechnology
Tue Apr 13, 2010 6:07 am
Forum: Build
Topic: Mid Side M-S Matrix Construction Information
Replies: 121
Views: 432917

MS Board Stuffing Notes

Wanted to remind our newest crop of builders of a few points regarding board stuffing: 1) The positive terminal of the polarized capacitors are square. The 1646 sense caps (which are not in series with the output) can be polarized or bi-polar. 2) The bridge rectifiers provide protection from phantom...
by mediatechnology
Mon Apr 12, 2010 9:26 am
Forum: Pro Audio Design
Topic: "Modified phantom-powered microphone circuit reduces distortion," Dimitri Danyuk
Replies: 22
Views: 38355

Re: Electronic Design IFD: Modified Schoeps Capsule Design

I like the wood block or Tom head transient. A chainsaw would be more fun though. (I've been enjoying mine a lot lately after our 13+" of snow back in February.) I'm thinkin' the SM98 and Schoeps terminated in something like 2K Ohms. Although it would be nice to AC-couple the 'scope input (and ...