ScanSpeak 18W, 8545-01 MidWoofer - Classic Range

This unit is an improved version of the highly praised 18W/8545-00 mid-woofer, where a new aluminium chassis, an updated cone and a new spider, as well as a few other details, are introduced; these updates improve mechanical stability and sound performance. High-quality magnet system design with patented Symmetric Drive (SD-1) continues to be key feature.

Features:

• Patented Symmetrical Drive Motor Design
• Coated Air Dried Paper/Carbon Fibre Cone
• 42mm Voice Coil w. Alu foil
• Low-Loss linear suspension
• Low Damping SBR Rubber Surround
• Aluminium Chassis

T-S Parameters:

• Resonance frequency [fs] 25 Hz
• Mechanical Q factor [Qms] 1.55
• Electrical Q factor [Qes] 0.22
• Total Q factor [Qts] 0.20
• Force factor [Bl] 8.4 Tm
• Mechanical resistance [Rms] 1.8 kg/s
• Moving mass [Mms] 18 g
• Suspension compliance [Cms] 2.3 mm/N
• Effective diaph. diameter [D] 136 mm
• Effective piston area [Sd] 145 cm²
• Equivalent volume [Vas] 68.6 l
• Sensitivity (2.83V/1m) 88 dB
• Ratio Bl/√Re 3.53 N/√W
• Ratio fs/Qts 125 Hz

Electrical Data:

• Nominal impedance [Zn] 8 Ω
• Minimum impedance [Zmin] 6.2 Ω
• Maximum impedance [Zo] 45 Ω
• DC resistance [Re] 5.7 Ω
• Voice coil inductance [Le] 0.39 mH

Power Handling

• 100h RMS noise test (IEC 17.1) 100 W

Voice Coil and Magnet Data

• Voice coil diameter 42 mm
• Voice coil height 19 mm
• Voice coil layers 2
• Height of gap 6 mm
• Linear excursion ± 6.5 mm
• Max mech. excursion ± 10 mm
• Unit weight 2.3 kg

PRICE (1 off)
£143.95 +vat +p&p