8"- 500W
Professional Woofer 8 N2,5 - 8 Ω Code Z005200
GENERAL CHARACTERISTICS Nominal Overall Diameter ................. 210 mm Nominal Voice Coil Diameter .............. 65 mm Magnet Weight ............................... 220 g Flux Density................................... 1.22 T Weight ......................................... 1.80 Kg
Ω Hz
Ω W W dB
n° 4 holes 5.5x7.5 on Ø196.0
Ø210.0
Ø183.0
g µm/N Wb/m lt. mm % cm2 Ω mH
40.0
85.5
2.0
CONSTRUCTIVE CHARACTERISTICS Magnet................................. Neodymium Voice Coil Winding................... Aluminium Voice Coil Former.................... Kapton Cone ................................... Paper Surround............................... Treated Cloth Dust Dome ............................ Solid Paper Basket ................................. Aluminium Die-Cast
45.5
7.5
THIELE-SMALL PARAMETERS Voice Coil DC Resistance ........... RE 5.40 Resonance Frequency ............... fs 83.9 Mechanical Q Factor................. QMS 4.59 Electrical Q Factor................... QES 0.26 Total Q Factor........................ QTS 0.25 Mechanical Moving Mass ............ MMS 19.5 Mechanical Compliance ............. CMS 180 Force Factor .......................... B×l 14.62 Equivalent Acoustic Volume........ VAS 11.9 Maximum Linear Displacement .... XMAX +/-2.5 2.60 Reference Efficiency ................ η0 Diaphragm Area ...................... SD 213.8 Losses Electrical Resistance........ RES 95.2 Voice Coil Inductance @ 1kHz ..... LE 0.37
ELECTRICAL CHARACTERISTICS Nominal Impedance........................... 8 Musical Power ................................. 500 Rated Power* .................................. 250 Sensitivity @ 1 W, 1 m ....................... 98.1
Ø98.0
*rated power measured with 2 hours test with pink noise signal, 6 dB crest factor, loudspeaker mounted on enclosure Thiele-Small parameters measured with LASER system
Frequency Response on IEC Baffle (DIN 45575) @ 1 W, 1 m - Impedance +110
500
+105 200
+100
+95
d
100
+90 50
B S
+85
Ω
P L
+80
20
+75 10 +70 5 +65 3 +60 20
50
100
200
500
Hz
1k
2k
5k
10k
Due to continuing product improvement, the features and the design are subject to change without notice. SICA Altoparlanti s.r.l. - ITALY – website: www.sica.it - E-mail: lab@sica.it - Tel. +39-071-7958072 - Fax +39-071-7959006
20k
24/11/06
8N2,5
GRAPHICS AND MEASUREMENTS
8” speaker – 2,5”voice coil
Force factor Bl (X) Bl [N/A] -Xprot < X < Xprot
Xp- < X < Xp+
Bl (-X)
17.5
+110
KLIPPEL
+105
15.0
+100 +95
12.5
d +90 B
10.0
+85 S P +80 L
7.5
+75 5.0
+70 2.5
+65
0.0
+60 20 -6
-5 -4 << Coil in
-3
-2
-1
-0 1 X [mm]
2
3
4
5 6 coil out >>
50
100
200
500
2k
1k
5k
10k
20k
Hz
Frequency Response: enclosure volume 14l, port tuning 100Hz (thick curve on axis, thin curve 30° off axis)
Bl(X): force factor variation with voice coil displacement
Electrical inductance Le (X)
Increase of voice coil temperature Delta Tv(t) and electrical input power(t)
Le [mH] Xp- < X < Xp+
Nominal Power
Voice coil temperature
350
KLIPPEL 0.6
500
Nominal Power [W]
0.5
0.4
0.3
0.2
300
400
250 200
300
150 200 100 100
0.1
50
0
0 0
12
25
39
52
65
0.0
79
92
105
119
t [sec] -6
-5
-4
<< Coil in
-3
-2
-1
X [mm]
-0
1
2
3
coil out >>
4
5
6
Power test done with intermittent excitation, ON interval 2min, duty cycle 50%, pink noise signal 6dB crest factor with frequency range 50-2000Hz.
Le: electrical inductance variation with voice coil displacement
Mechanical compliance Cms (X)
Stiffness of suspension Kms (X) Cms [mm/N]
Kms [N/mm] -Xprot < X < Xprot
9
Xp- < X < Xp+
Kms (-X)
-Xprot < X < Xprot
0.35
Xp- < X < Xp+
Cms (-X)
KLIPPEL
KLIPPEL 8
0.30
7 0.25 6 0.20
5 4
0.15
3
0.10
2 0.05 1 0.00
0 -6
-5 -4 << Coil in
-3
-2
-1
-0 X [mm]
1
2
3
4 5 coil out >>
Kms: stiffness of suspension variation with voice coil displacement
6
-6
-5 -4 << Coil in
-3
-2
-1
-0 1 X [mm]
2
3
4
5 6 coil out >>
Cms: mechanical compliance variation with voice coil displacement
Voicec Coil Temperature [°C]
-Xprot < X < Xprot