Search found 4705 matches

by mediatechnology
Sun Oct 07, 2007 3:23 pm
Forum: Pro Audio Design
Topic: 1992 Discussion with Bob Pease re Phantom Power
Replies: 0
Views: 7800

1992 Discussion with Bob Pease re Phantom Power

In my correspondence with Bob I mentioned that I thought the SSL 82E149 active mic pre was dumb. He asked why (page 3 but hard to see) and I explained to him what I didn't like about active mic preamps and phantom power. I wrote in the DC-coupled preamp thread that it had been bugging me for a long ...
by mediatechnology
Tue Oct 02, 2007 2:00 pm
Forum: Document
Topic: dbx 202XT 202R and 2002T Schematics
Replies: 1
Views: 14425

dbx 202XT 202R and 2002T Schematics

Gary Hebert of THAT Corporation was kind enough to send me schematics of the open-frame 202 replacement modules which they no longer make. Datasheets: http://www.thatcorp.com/datashts/202data.pdf http://www.thatcorp.com/datashts/2002data.pdf VCA History: http://www.thatcorp.com/vcahist.html Schemati...
by mediatechnology
Wed Sep 26, 2007 10:31 am
Forum: The Peabody Lounge
Topic: My Future Studio in progress
Replies: 7
Views: 18397

Re: My Future Studio in progress

Roger - I've been meaning to tell you how impressed I am with your studio pics. I don't actually use this stuff - the last time I mixed was in college - I'm a toolmaker I suppose. My studio consists of CoolEdit, an E-Mu 0404 and my daughter's Yamaha keyboard. I recall hooking up it's Midi connection...
by mediatechnology
Mon Sep 24, 2007 2:26 pm
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 307362

Re: Using the THAT1646 As A Power Transistor Pre-Driver

I've been mulling over the use of a "helper" op amp to provide output stage linearity compensation and reduce class-A idle current. I decided to see what the addition of a 5534 would do in order to get global feedback into the THAT1646 input. Using the Jim Williams (of Linear Technology Corp, not Au...
by mediatechnology
Sat Sep 22, 2007 3:53 pm
Forum: The Peabody Lounge
Topic: My Future Studio in progress
Replies: 7
Views: 18397

Re: My Future Studio in progress

$87? Wow. Deal of the century Adam. Good luck with the barn. When I worked for SSL US they were headquartered in a converted barn in Milan, MI. It worked very nice for them with SSL Console HQ upstairs and the SSL Organ operation downstairs. Needless to say the downstairs, being part woodshop was qu...
by mediatechnology
Sat Sep 08, 2007 5:11 pm
Forum: Pro Audio Design
Topic: Dynamic Equalizer
Replies: 4
Views: 13081

Re: Dynamic Equalizer

Oh. and it's nice to be able to discuss such things without someone feeling I'm taking advantage of them for financial gains or whatever.... That's our genesis here at the Pico Compressor Forum. The M/S stuff is definitely interesting. Maybe in the audio and the sidechain paths... Hmm... M/S Sidech...
by mediatechnology
Sat Sep 08, 2007 6:16 am
Forum: Pro Audio Design
Topic: Dynamic Equalizer
Replies: 4
Views: 13081

Re: Dynamic Equalizer

crusty - thanks for the reply. I suppose it is a multi-band dynamics processor with only one band processed and I briefly considered renaming the thread. But after thinking about it maybe not. I picked up the thread title from an existing post over at Prodigy where I contributed this. The distinctio...
by mediatechnology
Wed Sep 05, 2007 9:47 pm
Forum: Pro Audio Design
Topic: Dynamic Equalizer
Replies: 4
Views: 13081

Dynamic Equalizer

There was a post today over at Prodigy-Pro that reminded me of this: Larry Blakely while at dbx presented an AES paper "A Variable Frequency Limiter/Compressor/Expander" which was given the working model number dbx169. I don't think it was ever built but it was a frequency-selective dynamics process...
by mediatechnology
Wed Sep 05, 2007 12:00 pm
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 307362

Re: Using the THAT1646 As A Power Transistor Pre-Driver

sender: I haven't actually tested the maximum input range and it does depend on supply voltage. A very good question. I'm assuming that you're going to be using the unbalanced "common-mode" drive using the paralleled sense +/- pins as input and taking the output from both pins 1 and 8 in parallel. W...
by mediatechnology
Mon Sep 03, 2007 6:22 am
Forum: Pro Audio Design
Topic: Precision M-S (Sum/DIfference) Matrix Uses No Resistors
Replies: 5
Views: 22529

Re: Precision M-S (Sum/Difference) Matrix Uses No Resistors

Roger gave me an idea for something to try. We've had a lot of people ask about adding a variable width control and I've been somewhat concerned about it's effect on precision. The centertap ground pots in Rick Chinn's design also complicate building. I want to explore a way to subtractively vary "M...