Search found 5449 matches
- Wed Jan 11, 2012 2:16 pm
- Forum: Pro Audio Design
- Topic: Headphone Outputs: Build-Out vs. No Build-Out
- Replies: 43
- Views: 67944
Re: Headphone Outputs: Build-Out vs. No Build-Out
Not to be more contrarian than usual he is talking about distortion spurs down at -70dB.. for chuckles how about a distortion overlay for the transducer? Ah, there's the rub... He does admit that acoustic measurements may show more distortion... All measurements shown in this paper are taken at the...
- Wed Jan 11, 2012 12:10 pm
- Forum: Pro Audio Design
- Topic: Headphone Outputs: Build-Out vs. No Build-Out
- Replies: 43
- Views: 67944
Re: Headphone Outputs: Build-Out vs. No Build-Out
Sorry I didn't read the links I ASSume these measurements are of the voltage driving the cans, and ignoring the transfer function of the headphone transducers? Yes. Crosstalk at -60dB for stereo program is not a big deal. A 1/2 dB rise is barely audible in the midrange, and surely inaudible at freq...
- Wed Jan 11, 2012 11:15 am
- Forum: Pro Audio Design
- Topic: Headphone Outputs: Build-Out vs. No Build-Out
- Replies: 43
- Views: 67944
Headphone Outputs: Build-Out vs. No Build-Out
And the winner is: No Build-Out. I recently updated the headphone amplifier post I did at DIY Audio that's based on the THAT1646 with current boost transistors. People over there were wanting to use the DRV134 and it requires a simple mod. One of the forum members asked about removing the build-out...
- Wed Jan 11, 2012 7:17 am
- Forum: Pro Audio Design
- Topic: Simulate That1570 ?
- Replies: 4
- Views: 9325
Re: Simulate That1570 ?
Jensen Comtran? John - Did you ever have the hardware to run that?I never got into circuit simulation... back in the early days it wasn't that reliable.
samsagaz:
I don't know why they haven't provided a model of the 1570 yet.
It's certainly not here: http://www.thatcorp.com/Device_Models.shtml
- Wed Jan 11, 2012 7:09 am
- Forum: Pro Audio Design
- Topic: Common Mode Chokes
- Replies: 18
- Views: 31555
Re: Common Mode Chokes
I'm going to be ordering some common mode chokes in the 1-3 mH range from Mouser today and will look at those for mic input applications. I did run some pulsed RF (LF square wave AM modulation of sine at 100%) tests using a combination of the 94 uH/leg CM choke, 1K dampers, 270 pF/leg with a cross-c...
- Wed Jan 11, 2012 6:58 am
- Forum: The Peabody Lounge
- Topic: Is Old Vinyl Black Gold?
- Replies: 0
- Views: 6655
Is Old Vinyl Black Gold?
We're all seeing the ads for people wanting to buy our gold.
This one, for vinyl, recently came in the mail and caught my eye.
You're gonna have to pry my old King Crimson and Yes albums from my cold, dead, hands.
This one, for vinyl, recently came in the mail and caught my eye.
You're gonna have to pry my old King Crimson and Yes albums from my cold, dead, hands.
- Sun Jan 01, 2012 8:14 am
- Forum: Build
- Topic: M/S codec finished (pics)
- Replies: 8
- Views: 26361
Re: M/S codec finished (pics)
Wow, stunning.
I've seen some Lemo's used in TV broadcast remote applications here in the US.
Bill mentioned the green color and I'm reminded of vintage Altec gear. Your build has this retro vibe to it.
I've seen some Lemo's used in TV broadcast remote applications here in the US.
Bill mentioned the green color and I'm reminded of vintage Altec gear. Your build has this retro vibe to it.
- Fri Dec 30, 2011 6:46 am
- Forum: Pro Audio Design
- Topic: MicMix MasterRoom XL-305 Spring Reverb Clone
- Replies: 87
- Views: 487205
Re: MicMix MasterRoom Spring Reverb Project
Just found these sound files of various reverbs including the Masteroom XL-305 and XL-210:
http://old.nabble.com/Spring-Reverb-Dem ... 25697.html
New Years 2012 resolution: I really should get started cutting those springs...
http://old.nabble.com/Spring-Reverb-Dem ... 25697.html
New Years 2012 resolution: I really should get started cutting those springs...
- Tue Dec 27, 2011 11:34 am
- Forum: Pro Audio Design
- Topic: Common Mode Chokes
- Replies: 18
- Views: 31555
Re: Common Mode Chokes
Thanks John, Doug and ricardo. What carefully-chosen build-out resistors give, inductors taketh away... Fortunately resistors can give most of it back... A Zobel network was suggested earlier by ricardo. At the time I was thinking of a differentially-connected network of the type sometimes seen on t...
- Tue Dec 27, 2011 7:57 am
- Forum: Pro Audio Design
- Topic: Common Mode Chokes
- Replies: 18
- Views: 31555
Re: Common Mode Chokes
Hey, I'm the perv who keeps using transformer coupled tube gear from the 1940's, where it tends to usually be down 3 dB at 20kHz. It sure sounds cleaner, and the brain really knows how to imagine the harmonics in ways better than reality. But plenty would argue with me. Who cares? Ah, the good 'ole...