On a tangent, spent a lot of time playing with speakers. Trying to
determine best sound that could be had out of plastic enclosures. For
our application unported was our only option. This was for a
teleconferencing system, Bose though figured out that with tuned
porting you can make shitty cheap speakers sound stupendous.
Once blessed with a good enough approximation of "Golden Ears" to
supplement a self employed life style sufficient to put two kids through
college, I lately find myself turning on CC on all NetFlix binges. ;)
Probably the reason how absolutely amazed I am at how good some of these
new techology, small, shitty little speakers sound.
Have a small, and older BlueTooth box (Logitech UE BOOM) speaker that I
take out to the deck in the evening for music playback of my cell phone.
Keep in mind I'm often listening to a lot of material that I recorded,
produced, and mixed, so I know exactly what I wanted to hear, and should
still hear, those many years ago.
Stupendous is a good word ... ;)
Better magnets is the main reason. Speakers with rare-earth
magnets can move a lot more air for the same amount of input
signal than the speakers we had 20 or more years ago. Which
also means they're a lot better at overcoming their own
inertia to follow the input signal.
Those are incredible speakers although you need the space for them and
it appears they have come down considerable in price. The last time I
saw them, almost 13 years ago, they were in the $5K per pair range.
Not really Leon. The front of the speaker enclosure is open - or else
you wouldn't hear the sound. Volume does change instantaneously as the
cone moves. When you are pushing air out, you can't be sucking air in
at the same time if the enclosure is sealed and the only opening is
where the air is being pushed out. Compressing air if it can't escape
to the outside world would not create sound in the outside world.
Naturally the front of the speaker cone is open, but the back is/was
often ins an air tight environment.
I hate looking the info up but this kinda supports my comments.
Well... not so much. If I understand your earlier comments correctly,
you are interpreting a sealed chamber to mean an completely sealed
chamber. That's the point I commented on. It's not completely sealed
as long as the front of the speaker is open. The balance of the speaker
cabinet is neutralized to atmospheric pressure by that opening. It's
only that sound is directed by that sealed back. Not that volume and/or
pressure remain constant.
No the front of the speaker is open, obviously but the box in many cases
is air tight. You probably came into the conversation late and are
missing the key points.
Previous posts indicated the need for a vented port so that the speaker
would operate. I said that this was not true. There seemed to be some
thoughts that a speaker would not operate if it had a sealed compartment
behind it, which is not true.
Agreed Leon - I did come into it late and maybe I misunderstood some
points from the time I came in. I picked up on it where I thought I
read that a sealed cabinet had a constant volume and that's where my
initial comment entered. Sealed backs are one thing but there is no
such thing as a speaker cabinet with a sealed compartment. At the very
least, atmospheric pressure enters the chamber through the speaker cone.
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