BUT!!! ....we cannot possibly extend such an equally forgiving POV to
ol' notbob. He's obviously wrong and not deserving of our
forgiveness. Die, notbob! Die!
(c'mon, Mike, ya' know you wanna say it)
We having fun, yet? ;)
Mike - I'm too old to be a "Dude" and I've never been a "puppy". I
will admit my being "sick" is still in question, though. OTOH, if you
wanna dog me in this newsgroup, I'm up for it.
Despite having givin up this nonsense, years ago, the diminishing size
of usenet has made me long for more interaction. Wanna be my dance
I do know that Soundtraxx Mini-oval speakers have an enclosure that the
speaker fits tightly into, magnet side out. There is no hole for a vent
in that enclosure, nor is one needed. At the same time, though, realize
the dimensions of the speaker & enclosure are only about 8mm by 20mm.
Sometimes rules change as things get smaller.
Yep, and I built my own bass cabinets, as well as a few for others back
when I was young, and sexy, enough to lug an Ampex SVT head around. ;)
Most of the speaker cabinets I built contained 15" woofers, moved a lot
of air, and were baffled/ported" very precisely according to speaker
cabinet gurus I knew when doing studio work, as well as some being
direct copies of well known speaker cabinets ... much like I would
reproduce a chair for someone these days.
There is ton of physics that goes into designing a pleasing sounding
speaker ... with a bit of magic thrown. My studio was a (paid) test bed
for many of the more well known studio speakers down through the years.
I can say yeah or nay for the sound, but certainly wouldn't presume to
expound definitely on the physics, particularly when it comes to the
highly dynamic volume/pressures of air, inside and out, therefore the
precise "porting" requirements, in order to tune certain types of
speakers to a very specific frequency for desired bass reproduction.
Yep ... the idea of sealed enclosure speakers, a very specific type of
speaker design, is to allow the air behind the speaker to act pretty
much like a spring, which helps control the movement of the speaker
within its design limits.
It would have to be (relatively) "sealed" in order to do so.
If there is no vent, of course the volume changes. The speaker cone
moves, so the volume *has* to change. The air trapped inside the box
is the spring for the cone. This is an "acoustic suspension" speaker
(and they work quite well).
The volume remains the same, where does it go when it is in a sealed
container? Would volume and quantity be the same measurement?
Now if the speaker has an opening the volume does change. Speaker
movement in a sealed cabinet would simply increase and decrease
pressure. We are measuring air, not displacement. Displacement would
It's mainly for playing with right now. I've got a Pi 2 that I'm hooking
up my Digitrax PR3 programmer to, and may do so with the Pi 3.
I got lucky, I guess. I ordered the official touch screen from MCM and
preordered a Pi 3 about 3 weeks before it was available. They delayed
shipping the touch screen until the Pi 3 was available.
The touch screen is a nice bit of hardware, I've played with it for several
hours already and the only problems I have are basically Fitt's Law
related... Kinda hard to hit a 5-pixel by 10-pixel target with your huge
50x50 pixel fingers.
Been intrigued with the concept behind Raspberry Pi since it first came
out. They sure have hit on something I would have died for when I built
my first Heathkit in '68. Can you imagine, we'd probably rule the world
by now. LOL
Been thinking about getting one just for the hell of it, possibly to
cobble up a streaming audio/video cord cutting device, maybe using KOBI?
You got any interest/info in that direction?
On Thu, 31 Mar 2016 13:25:39 -0500, Swingman wrote:
Agreed. But I find the Arduinos much more fun. Not a "computer", a
"controller" Bunches of digital and analog I/O, with accessory boards do
do almost anything. Great fun on a model RR, and the robotics people buy
them by the dozen - a clone of the Uno model can be had for less than $10.
When fascism comes to America, it will be wrapped in the flag and
carrying a cross.
Seen the technology and it is also intriguing. Just wonder how TV
streaming from a digital signal to multiple units.
What I've heard about tasking with both, "If you can describe it with
less than two ‘and’s, get an Arduino. If you need more than two ‘and’s,
get a Raspberry Pi".
What do you think? Thanks.
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