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8"-90W Dual Cone Loudspeaker: LP 208.25/ 270 ER 4

This document provides specifications for an 8-inch dual cone loudspeaker. It includes technical details such as the speaker's diameter, power handling, impedance, frequency response, and construction materials. Key parameters are also listed, such as a resonance frequency of 77.6 Hz, sensitivity of 92.3 dB at 1 watt, and a rated power of 45 watts. The document contains both general characteristics and electrical/mechanical specifications for the speaker.

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113 views1 page

8"-90W Dual Cone Loudspeaker: LP 208.25/ 270 ER 4

This document provides specifications for an 8-inch dual cone loudspeaker. It includes technical details such as the speaker's diameter, power handling, impedance, frequency response, and construction materials. Key parameters are also listed, such as a resonance frequency of 77.6 Hz, sensitivity of 92.3 dB at 1 watt, and a rated power of 45 watts. The document contains both general characteristics and electrical/mechanical specifications for the speaker.

Uploaded by

Dæve
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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8"- 90W Dual Cone Loudspeaker

LP 208.25/ 270 ER 4 Ω
Code Z004209

GENERAL CHARACTERISTICS ELECTRICAL CHARACTERISTICS


Nominal Overall Diameter ................. 208 mm Nominal Impedance........................... 4 Ω
Nominal Voice Coil Diameter .............. 25 mm Musical Power ................................. 90 W
Magnet Weight ............................... 270 g Rated Power* .................................. 45 W
Flux Density................................... 0.90 T Sensitivity @ 1 W, 1 m ....................... 92.3 dB
Weight ......................................... 1.00 Kg

THIELE-SMALL PARAMETERS n° 4 holes 8×5


Voice Coil DC Resistance ........... RE 3.12 Ω on Ø 197.0
208.0
Resonance Frequency ............... fs 77.6 Hz
Mechanical Q Factor................. QMS 4.98
Electrical Q Factor................... QES 1.16
Total Q Factor........................ QTS 0.94
Mechanical Moving Mass ............ MMS 13.3 g
Mechanical Compliance ............. CMS 316 µm/N
Force Factor .......................... B×l 4.18 Wb/m

183.0
Equivalent Acoustic Volume........ VAS 20.5 lt.
Maximum Linear Displacement .... XMAX +/-1.5 mm
Reference Efficiency ................ η0 0.79 %
Diaphragm Area ...................... SD 213.8 cm2
Losses Electrical Resistance........ RES 13.4 Ω
Voice Coil Inductance @ 1kHz ..... LE 0.24 mH
3.0

5.4
CONSTRUCTIVE CHARACTERISTICS
Magnet................................. Ferrite
Voice Coil Winding................... Copper

46.6
6.0
Voice Coil Former.................... Epotex
69.4

Cone ................................... Paper


Surround............................... Treated Cloth
Dust Dome ............................ Dual-Cone Ø 86.0

22.8
Basket ................................. Pressed Sheet Steel

*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 – Free Air Impedance


+110 500

+105

200
+100

+95 100

d +90
B 50

+85 Ω
S
P
L +80 20

+75
10

+70

5
+65

3
+60
20 50 100 200 500 1k 2k 5k 10k 20k
Hz

Due to continuing product improvement, the features and the design are subject to change without notice. 01/02/12

SICA Altoparlanti s.r.l. - ITALY – website: www.sica.it - E-mail: lab@sica.it - Tel. +39-071-7958072 - Fax +39-071-7959006

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