[sdiy] Slightly OT: really loud but light weight speakers

[Stephen Begin]

sounds like a job for piezo horns..., very light, and very loud, also cheap
and small.  The only problems i can think of are that they tend to be very
directional, you'd have to throw together something to help spread out the
sound, that and although they really excel in high ranges but you can't
expect too much mid out of them.
There's a place here that sells surplus stuff they used to have really rad
motorola horns for 5$ (canadian) each.

-Steve

----- Original Message -----
From: "Joris" <joris at joris.org>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, November 05, 2002 2:01 PM
Subject: [sdiy] Slightly OT: really loud but light weight speakers


>
> Together with a friend I'm building a remote controlled combat robot
> with built in sample player, amp and two speakers.
>
> The speakers should be as loud as possible (the battle arena is noisy)
> and still weigh very little (there is a weight limit for the bot).
> We've reserved 2 kg (4.4 pounds) for the pair of speakers. We're
> planning to filter out the low frequencies and use some kind of
> speakers intended for mid and high frequencies.
>
> I don't know much about speakers though... in our previous robots
> we've used car speakers but they tend to be either too heavy or too
> quiet. Any suggestions would be much appreciated!
>
> Joris
>