Recent Posts

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Bipolar System Disorders / Re: equipment stands
« Last post by Nick B on Today at 10:26:11 AM »
Check out the Pangea Vulcan Stands from Audio Advisor



$99 in black and $129 in optional finishes

https://www.audioadvisor.com/prodinfo.asp?number=PGVULRK

Thanks, Tom. Looks good and great price 👍
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 Well, any progress ?


charles
3
Amplification and Preamplification / Re: Folsom Teaser
« Last post by rollo on Today at 09:13:27 AM »
  Cool.  8)


charles
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Signals and Noise / Re: Ethernet Cables
« Last post by rollo on Today at 08:14:02 AM »
Talk to Pete @ TWL.

Might be something there for you.

Just sayin'.

   Dave we have the TWL/PIA Ethernet cable, pay attention. We are having an issue with the female connector of DAC and transport. Loose and can either loose or distort signal. Very puzzling as not all Ethernet cables tried have this issue. Just the Wireworld and TWL/PIA cable.
It must be the female Ethernet connector. Is ther a standard DIN of such things ?


charles
5
Bipolar System Disorders / Re: equipment stands
« Last post by tmazz on February 23, 2018, 10:26:08 PM »
Check out the Pangea Vulcan Stands from Audio Advisor



$99 in black and $129 in optional finishes

https://www.audioadvisor.com/prodinfo.asp?number=PGVULRK
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Speakers / Re: Room size and Bass
« Last post by richidoo on February 23, 2018, 08:45:34 PM »
Can the subs fully develop the 20 HZ signal ?

Yes. Car stereos can have nice clean low bass.

Actually there are advantages to using a smaller room...
Modes are raised higher in frequency in room with smaller dimensions, making them easier to damp.
Cabin gain boosts low frequencies in reverse proportion to room volume - requiring smaller bass drivers and less amplifier power to achieve flat FR and high SPL.

and disadvantages too of course,
Too large (passive xo) woofers in too small room will over power the room, and nothing you can do about it.

The important thing is to size the woofers to complement the size of the room and your desired FR.
Or you can use EQ or active xo to fine tune the bass response to the room volume.

If you were an ant inside the subwoofer would you hear any sound? The internal dimensions are much smaller than any wavelength the sub plays. Of course you'd hear it all, for a short time until you went deaf.
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Amplification and Preamplification / Re: Folsom Teaser
« Last post by Folsom on February 23, 2018, 08:32:39 PM »
I'm doing some finalizing but my hopes are to get commitments for boards by next week, so I can order ASAP. 

Have to move a few things around on the PCB before printing.

The PSU will work well with two Antipoles bottom to bottom, spaces, and L brackets. You connect the + and - on one of them to form a PG, and then run wires off of the + and - left over to the amp.

It needs way more heatsink than I have in the picture. This one can use one of those cases that has heatsink walls. Maybe a copper bar heat spreader is wise too.

The feedback can have different character based on different caps, but I think I'm settling on one that has real punch, real texture, real dynamics. It sounds good in other ways too. Another cap sounds euphoric, another is insanely refined...  :rofl:

The feedback operates either on 9v or solarcells. I'm looking at doing a DC offset prevention thing, because you can get up to .5v DC offset when the battery dies (lasts for a number of months, maybe more, not sure).
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Amplification and Preamplification / Re: Folsom Teaser
« Last post by richidoo on February 23, 2018, 08:27:59 PM »
Ghost in the Machine   8)
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Speakers / Re: Room size and Bass
« Last post by dBe on February 23, 2018, 07:49:24 PM »
Yo, Bro'.  Go here if you can run old Excel (2000) programs:

http://audio.claub.net/software/jbabgy/BDBS.html

The software developed by Jeff, Paul, Thorsten, et al and the bunch back in the day is still the best modeling software available for zero outlay.

Bottom line is, yeah.  You will have a bunch Of 20Hz as well as additional low bass below the critical dimensions of the room.
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Signals and Noise / Re: Ethernet Cables
« Last post by P.I. on February 23, 2018, 06:25:26 PM »
Talk to Pete @ TWL.

Might be something there for you.

Just sayin'.

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