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SCAN SPEAK 18W/4545-03 Classic 7" Woofer
This unit is an improved version of the highly praised 18W/4545-00 midwoofer, where a new aluminum chassis, an updated cone and a new spider as wells as a few other details are introduced.
Patented Symmetrical Drive Motor Design
Improved Air Dried Paper/Carbon Fibre Cone
42mm Voice Coil w. Aluminum foil
Low-Loss linear suspension
Low Damping SBR Rubber Surround
Scan-Speak Classic 18W/4545-03 7" Woofer
Note: The T/S Parameters specified below are taken from the 18W/4545-00 as more specific T/S Parameters are not available yet.
Woofer Series: Classic Series
Woofer Type: Midwoofer
Nominal Diameter: 7"
Power Handling (RMS): 80 Watts
Power Handling (max): 160 Watts
Impedance (Z): 4 ohms
Sensitivity (SPL at 1m / 2.83V): 90 dB
Frequency Response: 30 to 3,000 Hz
Voice Coil Diameter: 1.65"
DC Resistance (Re): 3.4 ohms
Resonant Frequency (Fs): 35 Hz
Mechanical Q (Qms): 2.49
Electromagnetic Q (Qes): 0.38
Total Q (Qts): 0.33
Diaphragm Mass Inc. Airload (Mms): 21.6 g
Mechanical Compliance of Suspension (Cms): 0.96 mm/N
Surface Area of Cone (Sd): 145 cm²
BL Product (BL): 6.6 Tm
Compliance Equivalent Volume (Vas): 28.2 L
Maximum Linear Excursion (Xmax): 6.5 mm
Cone / Diaphragm Material: Paper
Basket / Frame Material: Die cast aluminum
Magnet Material: Ferrite
Overall Outside Diameter: 6.97"
Overall Depth: 2.93"
Baffle Cutout Diameter: 6.22"
Mounting Holes: 6
