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First and only coaxial driver, as far as we know,
that is also time aligned ( the 2 emissive centers are at
the same place ) and that is not disturbed by recovering
frequencies and a filter right on the most sensible zone
for the human ear : 30 cm ( 12" ) high efficiency wide
range unit non filtered : 97 db, paper cone, basket and
ring made from bronze SN12 without lead, pole pieces made
of very mild steel < 0,20% carbon in pot shape with
central alnico 3SC ( = no magnetic looses ), plus
piezo-electric tweeter featuring high impedance, into a
bronze pot SN12, sharply filtered at 11 kHz and climbing
over 30 kHz ( c .f. doc TW 37 )
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Each driver part is controlled and measured all along the
manufacturing process . Each driver is put under a very
serious pre-running and then measured in order to match
pairs with max tolerance delta as 0,2gr. on mobile
equipment mass, 0.1 Ohms on d.c. resistance , 2Hz on
resonance frequency, is numbered and life guaranty ( first
owner ) . |
| CHARACTERISTICS |
ø voice coil = 35 mm
h = 8 mm 2 layers cu
M = 9,7 gr
dB = 97
G = 1,4T alnico Alcomax 3SC
Admissible power= 50 W |
fs = 36 Hz
re = 13,8 Ohm
Qes = 0,62
Qms = 6,60
Qts = 0,59
Vas = 224 litre
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Z = 16 Ohm
Zmin = 14,9 Ohm
Zmax = 125 Ohm
D = 234 mm
Ms = 23,2 gr
Le = 1,2 mH |
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Recommanded speaker : BAFFLE
PLAN
you will find details into montage page.
Hole diametre = 270
7 screws ø 5 at 54,3 ° on r = 144
Net weight = 9,3 kg
Packed weight = 13,5 kg |
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| These characteristics have an indicative value
and are only the result we have in our deaf anechoic
chamber from measuring equipment actually in our
possession . It always must be kept in mind that the main
ones , as the natural , equilibrium , musicality , cannot
be described above but are only partly derived from them . |
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