inverse response speaker flattening

[Theo]

I've read about a intresting thing from Philps: Digital speakers.
It is a multi coil disign where every bit has it's onw coil, or somthing
like that.
Sofar I understood the coils ain't wire wound but etched or  printed
instead.
It has been three or four years ago that I read this,
it seemed to be a "let's try this maybe it is cool" project, don't know if
they still work on it.

Cheers Theo

----- Original Message -----
From: Martin Czech <czech at Micronas.Com>
To: <synth-diy at node12b53.a2000.nl>
Sent: Friday, May 12, 2000 7:54 AM
Subject: inverse response speaker flattening


> There is one thing I wonder about:
>
> You have music from digital sources all the way, till power amplifier. It
> would be no problem to ship a little digital in/out box with a measuring
> microphone, so that anyone can measure the frequency response of his room
> and his speakers, the box takes the inverse to filter the CD data. That
> should give an almost ideal response for that single measuring point in
> space and hopefully around it.
>
> Of course, once the speakers are flattened, any personal taste could be
> applied as well (bath tub).
>
> One problem could be that shitty bass chassis could not take the needed
> power...
>
> I have never seen any advertisement for such an apparatus, it seems that
> something like that simply does not exist.
>
> Another question:
>
> In the 70ties people thought about switching amplifiers.
> I.e. DAC amplifiers. The audio chain would be digital up to
> the speakers. Are there any reasonable advances/designs
> today?
>
> m.c.
>