H21LB15

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H21 LB 15 H21 LB 15
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 ) .

CHARACTERISTICS
ø voice coil = 25 mm
h = 8 mm 2 layer cu
M = 5,9 gr
dB = 98
G = 1,4T alnico Alcomax 3SC
Admisible power = 25 W rms
fs = 45 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

 

clio analisys Impedance Impulse response

 

Recommanded speaker : BAFFLE PLAN
you will find details into montage page.
hole diametre = 202
5 screws ø 5 x 72° on r = 108
Net weight = 4,2 kg
Packed 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.