APOLOGIES TO ALL: PIEZO TWEETERS DO SOUND LIKE ****!!!!
On Tue, 14 Feb 2017 22:31:54 -0700, Paul wrote:
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Hi Paul,
I don't know if these will physically fit as a replacement, but the
"Img Stage Line MHD-152" horn is doubtless much better than the piezo
tweeters. It is 8 ohms, has a -6db range from 0,8 - 20 kHz straight
ahead, and sensitivity of 102 dB (2,83 V, 4 kHz, 1 m distance). It is
not cheap though, 110 euro in Germany. Measured under 30 degrees
horizontally it's about 10 dB less (that's a good value, and it's
constant directivity, meaning the 10 dB is fairly constant even if
the frequency gets higher). Vertically 30 degrees off, it is much
more, 20-30 dB less.
Usable from 2 kHz upwards, because of some resonances below it: you
need to put it behind an 18 dB 2 kHz high pass filter (one L, 2 C).
Mat Nieuwenhoven
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