Search found 4701 matches

by mediatechnology
Sat Sep 22, 2007 3:53 pm
Forum: The Peabody Lounge
Topic: My Future Studio in progress
Replies: 7
Views: 18373

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: 13055

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: 13055

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: 13055

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: 307153

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: 22493

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...
by mediatechnology
Sat Aug 25, 2007 10:22 am
Forum: Pro Audio Design
Topic: Precision M-S (Sum/DIfference) Matrix Uses No Resistors
Replies: 5
Views: 22493

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

Roger I did receive it and want to look it over. The layout is the one with balanced I/O and the inverter in the middle which allows the actual matrix to be either -6 or 0 dB compensation for "build-up" gain. What I need to run some more experiments on are the choice of THAT1240 and 1246 at the inpu...
by mediatechnology
Tue Aug 21, 2007 8:49 am
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 307153

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

Thanks Keith. I want to find a way to operate it closed loop with a "helper" op amp next. But with the distortion so low as it is (with the final buffer operating Class-A without global or local feedback) I'm tempted to just quit and leave it alone. For a portable version (stereo would pull 120 mA m...
by mediatechnology
Mon Aug 20, 2007 5:23 pm
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 307153

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

I just rebuilt this little circuit on it's own protoboard with a better heatsink. The idle current as measured through the V+ lead is 60 mA. So with 36 V supplies this little baby is burning off 2.2 watts Class-A while it's doing nothin'. https://www.ka-electronics.com/Images/jpg/energy_star.jpg Nah...
by mediatechnology
Sun Aug 19, 2007 8:47 pm
Forum: Pro Audio Design
Topic: Why A GSSL and SSL Compressor Aren't Exactly the Same
Replies: 2
Views: 19112

Re: Why A GSSL and SSL Compressor Aren't Exactly the Same

Thanks ghengis. I don't know of any that sum L+R as audio ahead of the detector. Not to say that there aren't some that do. Roger, in the original Pico Compressor, did provide this as a build option but I don't know of anyone that's used it. Most that we've heard of used true power sum. I agree that...