Peerless SDS-983855, 4-inch Woofer, 8 ohm

The SDS-P830855 is a compact 4" woofer from Peerless's SDS series, designed to give a low resonant frequency from a small driver and optimised for sealed enclosures. It pairs a coated paper cone with a durable NBR rubber surround, driven by a ferrite magnet motor and a 25.8 mm voice coil, all housed in a pressed steel basket with a truncated frame that fits narrow cabinets.

With 5 mm of linear excursion and a 66 Hz resonance, it works well as the bass/mid driver in small two-way speakers, as a midrange in three-way systems, or as a compact sealed subwoofer.

Key Features

• 4" coated paper diaphragm

• NBR rubber surround

• Ferrite magnet motor

• Pressed steel basket with truncated frame

• Optimised for sealed enclosures

Specifications

• Transducer size: 4"

• Nominal impedance: 8 Ω

• DC resistance (Re): 5.6 Ω

• Minimum impedance (Zmin): 6.3 Ω

• Frequency range: 60 – 5,000 Hz

• Sensitivity (2.83 V / 1 W @ 1 m): 83.1 dB

• Power rating (IEC 268-5): 30 W

• Resonance frequency (Fs): 66 Hz

• Qms / Qes / Qts: 4.56 / 0.539 / 0.48

• Equivalent volume (Vas): 3.26 l

• Moving mass (Mms): 6.3 g

• Compliance (Cms): 910 µm/N

• Force factor (Bl): 5.24 Tm

• Motor efficiency (β): 4.88

• Effective piston area (Sd): 50.3 cm²

• Voice coil diameter: 25.8 mm

• Voice coil inductance (Le): 0.343 mH

• Air gap height / winding height: 6 mm / 12 mm

• Linear excursion (Xmax): 5.01 mm

• Max mechanical excursion (Xmech): 12.3 mm

• Frame dimensions: Ø123.3 mm × 105.1 mm (truncated)

• Overall depth: 62.3 mm

• Mounting holes: 6 × Ø4.5 mm on 114 mm bolt circle

• Terminals: 4.8 mm and 2.8 mm tabs

• Net weight: 0.74 kg

PRICE (1 off)
£23.53 +vat +p&p