| CLICK ON PICTURE TO ENLARGE |
High efficiency 21 cm ( 8" ) wide range unit,
paper cone, basket and ring = bronze without lead SN12
, pole pieces made of very mild steel < 0.20 %
carbon in a pot shape with central ALNICO 3SC magnet : all
fields is in the gap and magnetically proof ( TV… )
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 0,1gr. on mobile
equipment mass, 0.1 Ohms on d.c. resistance, 1Hz on
resonance frequency, is numbered and life guaranty ( first
owner ).
*This
unit characteristics are the same as H21lb15 exeption of
voice made of silver wire insulated with 15 micrometer
silk. This avoids nearly totaly the production of MDI (
Micro Discharges of Interface ) and other perturbations. |
| CHARACTERISTICS |
ø
voice coil = 25 mm
h = 8 mm 2 layers silk silver
M = 5,9 gr
dB = 98
G = 1,4T alnico Alcomax 3SC
Admissible power = 15 W rms |
fs
= 40 Hz
re = 12,8 Ohm
Qes = 0,65
Qms = 6,10
Qts = 0,59
Vas = 97 litre
|
Z
= 15 Ohm
Zmin = 14,4 Ohm
Zmax = 155 Ohm
D = 176 mm
Ms = 9,4 gr
Le = 1,1 mH |
 |
Recommanded speaker : BAFFLE
PLAN
you will find details into montage page.
Hole diametre= 202
5 screws ø 5 at 72° on r = 108
Net weight = 4,2 kg
Packet weight = 6 kg |
 |
| 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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