How do TINY speakers produce such BIG sound? - Page 4

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Re: How do TINY speakers produce such BIG sound?

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I agree there. It's a very nice sound though, and it does work for some
music that comes from times when this was the only way you could do it. The
history is short, on the scale of music making, and the accepted sound has
a lot to do with context. I'm old enough to know valve sound and young
enough to know PWM based systems as an equally formative effect on what I
think is the ideal. While PWM is still new enough to be mainly considered
for raw efficiency, not hi-fi, it's like the development of op-amps,
getting closer all the time. To me those things will become hi-fi, reducing
the gain stage to a clean magnifying window, as magical and also as prosaic
as an achromatic lens. The idea of using valve preamps, or even digital
emulations such as the technique used in Sound Forge's 'Acoustic Mirror'
will seem like a nightmare to some, but many others will use it. That way
you might play music from the 60's or 50's not only through a valve sound,
but even the valve sound of equipment of the time it was made. If people
can model components with spice modelling, and use sample rates up to 192
KHz with bit depths of 24 or more, as is happening now, the resolution will
be finer than we can perceive, and the majority of people will be calling
it hi-fi. If it brings them more ways to match a sound with the conditions
that created it, I won't be telling them they're wrong.

Re: How do TINY speakers produce such BIG sound?

On a sunny day (Sat, 13 May 2006 05:20:49 GMT) it happened VWWall

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This is not correct.
For a modern single chip version 75W rms woofer driver I use:

Nothing extraordinary,. very simple, drives the woofer (L+R combined)
from the PC speaker, or if 5 ch the bass.
I have mounted the speaker to the floor..... cone down...
That extra floor vibration adds to the tiny PC speakers....

As to you original remark, thsre do exist DC couple transistor amps
with output cap (and usually a boost cap to lift the driver voltage),
but only for low power stuff.

This chip I am using is a CMOS chip, and very very stable (note the
missing R+C across the output.

It is a very nice chip.

Re: How do TINY speakers produce such BIG sound?

On a sunny day (Wed, 10 May 2006 11:23:38 +0100) it happened Andy

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As people do not seem to pay attention anymore to 'distortion', most
modern cellphones use pulse width modulated audio amps for better efficiency,
longer battery life, and more power.
Small powerful speakers have been around since the sixties.

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Re: How do TINY speakers produce such BIG sound?

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> Over the last few years electronic devices have
produced some
> sounds from a tiny crappy looking almost-flat
> So how is it done?
Hello, and I have witnessed the same thing.
The perhaps unexpected
and fidelity can be attributed to speaker
design/quality, enclosure
acoustics and speaker siting within the enclosure.
Capability does
always correlate to bulk.  There are small high-end audio
pedestal-mounted speakers whose performance equals or excceds that
their larger brethren.  Even a low to middle end producer like Bose
some impressive things with their "acoustic waveguide"
Granted these
transducers are larger than that found in hand-held
equipment.  Signal
processing such as Dolby NR can certainly provide
enhancement although I'm
uncertain as to what is used in cell phones.
would expect acoustic signal
processing to be applied more in a
designed to reproduce music.

acoustic/psychoacoustic phenomenon relating to fidelity that
into play is
that of the "missing fundamental" (you can
Google for further
into).  Which is
why some of us still remember getting decent rock
roll sound from shirt
pocket sized AM transistor radios.  Sincerely,

John Wood (Code 5550)      
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337[/quote:cf5c155e51]

sorry, I would have to disagree.  Speaker technology hasn't really
progressed at
all.  Other then certain devices using flat panel tech,
which includes my
Monsoons on this computer.

All Bose has ever done, starting with their 301 home
series speakers,
is seriously distort the sound field.  By dispersing left and
channel information into the wind.  They no longer have a hearable
and right localized sound.  Hardly what the artists intended.

Cone tech, other
then using carbon fiber cones, hasn't advanced since
the 70's.  Today's Sub
Woofers were yesterday's bass speakers.  Only
now, you only get one!  Who's
kidding who?

The only thing I've seen is a huge quality drop in fidelity

Topped off with the introduction of MP-3's.

Yesterday's CrO2
cassette tapes can wipe the floor with an MP-3.
MP-3's are sonically laughable
and so are most of the speakers you
see at stores.

My midrange is an 8 inch
speaker.  How big are today's woofers?  8
inches tops?

Sorry, I'd have to say
"get real."

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