[sdiy] speaker fun against summer silence

[Czech Martin]

Over the weekend I felt somehow sick, so stayed in, though it had 35C again...
Perhaps some of the fruit where not too healthy, you know what I mean...

I discovered that I have a couple of speakers from the last
"clean up your old room at your fathers house action".

Two 7cm car speakers, one 10cm bass car speaker with addtional tweeter inside,
then 8 26cm bass woofers, one bass-midrange 10cm...
And a failed talk-box driver & enclosure.

I tested them with guitar sounds, but synths could be used also.

You just need a lot of old speakers, a microphone and an amp, and of you go.

Without enclosure the bass woofers of course have no bass.
But the high range is also limited, and if the microphone is close
to membrane the bass is there again...
Good thing to get rid of the distortion buzzzzz.
The failed talk-box sounds quite good, even when slighly overdriven (speaker,
not amp).
When the enclosure is closed with a little 1cm hole in the cap,
the 0.5 dm^3 volume togehter with the hole give some strange resonance
pattern, insectoid?
The I saw this cardboard tube, 130cm long, 10cm diameter, what a nice
transmission line... Of course, since the driver is "full" range
there are a lot of resonances, towels can damp them away.
Towels are nice and effective low pass filters anyway...

Closed and open response of the TL can be tested.
The little enclosure of the talk-box will lead to fine feedback,
if the guitar is near, without insane loudness or high frequency
squealing. Quite a discovery!

Since the local SPL is quite high, the microphone noise will not matter
at all, could be different for some synth stuff.

So a lot of fun with almost forgotten things, basically for free.

That brings me back to electronic sounds..., a good part of the
1950's academic sound was reverb rooms, speakers and mics.
Sometimes it was simply the staircases.

In october we will have our traditional electronic sound performance:
http://www.zem.de/termine.htm

I did not know what to prepare for this, now I know what I could do
or where to start...


btw.: what is usually used for guitar amp mic pick up?
I guess magnetic coil? Shure something?

m.c.