Pro Audio Design Forum

Thanks Wayne. I had most of the parts here already. I had the Vishay fusable R's in 10Ω and 1Ω. I ordered the other values. I also ordered some of the 1W Holco's in some of the same values. I didn't know if the fuseable R's had compromises to make them flameproof. I only used flameproof resistors on...

I'm finally getting around to building one of these as a headphone amp. I don't really like headphones so it wasn't at the top of the list. I think to fully evaluate the Widener board I will need headphones. Wayne and Roger to the rescue. I guess I have a few questions. I don't think a full schemati...

mediatechnology wrote:OK, I did a reality check.
It does sound nice.

I think we may be the first humans to hear this. I could have set something like this up in software but never bothered. I don't think too many others have thought to do this.

mediatechnology wrote: The more I think about it a 1 kHz filter HP will have an effective frequency of 2 kHz.

I guess I got it almost right by mistake. I used a HPF with 0.22uF's and a 604Ω. That would be at about 603Hz. That doubled is about 1k2Hz.

Thanks for the feedback on the Widener! I come up with 0.13 uF per leg for a 1 kHz filter fc but I think the effective frequency is off by an octave due to the "0.5" gain term in the LR+-S process. Electrically the gain of -6dB, the "0.5," occurs at IC7. I must admit I still don...

I think I screwed up the crossover frequency. Since this is a balanced filter the R value has to be divided in half. I believe with the values I have the crossover is at 604Hz. I need to change the caps to about 0.13uF to get 1K Hz. Or I could be wrong again...

I did an R&D build for this. Wayne sent me a PCB a while ago but I didn't have a chance to check it out. At first blush i didn't see how this was significantly different than using the M/S board. It's significantly different and well worth checking out. Since I have elliptical EQ's already I did...

and from years of dealing with loose dogs as a jogger, the main relationship I try to impose with any new dog I encounter is that I am the alpha dog.... are probably told to shut up several times a day by their owners, so often defer to me as alpha. My Dad would let the childhood dog run at night. ...

In the dog world there is a distinction between a dog that's a sentinel and a guard dog. For instance in a Tibetan monastery the Lhassa Apso's would sound the alarm barks while the Tibetan mastiff would dispatch unwanted guests.

We had chickens for the early part of my childhood. My father was still working on his PhD. in animal behavior using chickens. I find it pretty funny now because he's not very good with animals. When I think about how my childhood dog was trained it makes me cringe. I knew some people with "gua...