Search found 5079 matches

by mediatechnology
Sun Aug 19, 2007 5:15 pm
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 320876

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

Thanks Roger. No I didn't see much offset which is surprising. Maybe I got lucky "matching" random transistors. For a line driver you can't beat the bare 1646 or a 1646/transformer configuration as you've shown us. The open loop distortion performance driving 30 ohms is not spectacular: I ...
by mediatechnology
Sun Aug 19, 2007 2:36 pm
Forum: Pro Audio Design
Topic: Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp
Replies: 80
Views: 320876

Using the THAT1646 As A Transistor Pre-Driver/Headphone Amp

As many of you know I've explored unconventional ways to use the THAT1646. See: https://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=140 We've discussed driving the THAT1646 in common mode so that both outputs swing together rather than anti-polarity. In the common mode configurati...
by mediatechnology
Wed Aug 15, 2007 4:50 pm
Forum: The Peabody Lounge
Topic: Welcome to the Peabody Lounge
Replies: 5
Views: 13154

Re: Welcome to the Peabody Lounge

Yes and a lot of room service too!

And Gridley's...
by mediatechnology
Wed Aug 15, 2007 11:27 am
Forum: Pro Audio Design
Topic: Hello Everyone
Replies: 7
Views: 15808

Re: Hello Everyone

Thanks Greg for dropping in here.

We're looking forward to more projects too!

I'm dying to try a quick project with the THAT1646 to add external current boost transistors.

Wayne
by mediatechnology
Wed Aug 15, 2007 7:38 am
Forum: The Peabody Lounge
Topic: Welcome to the Peabody Lounge
Replies: 5
Views: 13154

Re: Welcome to the Peabody Lounge

I lived at the Peabody for months while working at both Ardent and the Fire Station. Gary picked up most of the tab: I think SSL's net cost was about $30/night. I didn't really like living in hotels for long periods: The Peabody (and Memphis) were an exception.

Thanks for joining us here BTW!
by mediatechnology
Tue Aug 14, 2007 1:24 pm
Forum: Pro Audio Design
Topic: Why A GSSL and SSL Compressor Aren't Exactly the Same
Replies: 2
Views: 20136

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

I've been looking for this SSL blue line drawing and just found it. It shows how the 82E26 cards and the 82E27 in the original SSL are connected together. Note that pins 16, 33 and 42 of the 82E26 are bussed from one board to the other and common at the 82E27 sidechain card. https://www.ka-electron...
by mediatechnology
Tue Aug 14, 2007 7:00 am
Forum: Pro Audio Design
Topic: Precision M-S (Sum/DIfference) Matrix Uses No Resistors
Replies: 5
Views: 23778

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

ghengis: Thank you for the reply. I agree that balanced I/O would probably be better. One of the reasons I might be reluctant to do it is that the circuit, for full stereo encode/decode, has 8! I/O ports. So the balancing stuff takes a really simple circuit and doubles the part count. But as a pract...
by mediatechnology
Mon Aug 13, 2007 4:21 pm
Forum: Pro Audio Design
Topic: Precision M-S (Sum/DIfference) Matrix Uses No Resistors
Replies: 5
Views: 23778

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

Thanks Roger. DIPS and bypass so not a hard one to route. It pays to eliminate all the resistors. What do you think we should do about I/O. Balance it?
by mediatechnology
Mon Aug 13, 2007 2:20 pm
Forum: The Peabody Lounge
Topic: Great people, Who would you want to meet?
Replies: 2
Views: 8761

Re: Great people, Who would you want to meet?

I didn't have to think about that one too long.

My Dad, only about ten years before I was born. I'd like to know the things that shaped his life before I knew him as a child.

Image
by mediatechnology
Mon Aug 13, 2007 7:58 am
Forum: Pro Audio Design
Topic: Precision M-S (Sum/DIfference) Matrix Uses No Resistors
Replies: 5
Views: 23778

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

OK, there are resistors. Just laser trimmed ones internal to an IC. Background: I've noticed that there seems to be increased interest in M-S Sum/Difference processing in mastering as well as recording. There are a number of matrix circuits that allow adjustment of the stereo field providing variab...