Alpine SBR-S8D4.2 900W 8” Compact Subwoofer (with included grille | SWR-823D Pre-installed)

The SBR-S8D4 features Alpine’s Type-R 8″ subwoofer in a custom slot ported enclosure. Ideal for installation in small spaces, its compact size means it can fit virtually anywhere.

The pre-installed subwoofer employs many features typically found in larger models, such as Alpine’s H.A.M.R (High Amplitude Multi-Roll) suspension. This unique design allows greater linear excursion while improving control, to achieve maximum output and outstanding sound quality.

Designed to achieve optimal output, the carpeted enclosure features heavy-duty MDF construction. Plus, stylish brushed aluminium laminate and a robust grill create the perfect balance of stunning aesthetics and practicality.

Features

• 900W Peak Power
• 350W RMS Power
• High Amplitude Multi-Roll (HAMR) surround
• Frequency Response: 24Hz – 200KHz
• USA Designed Slot Ported Subwoofer Enclosure
• Heavy Gauge Spring Terminals
• Dimensions: (L x W x H cm) 49 x 29 x 16
• SWR-8D4 Pre-installed
• Grille Included

Specifications

• Subwoofer Size: 8″
• Power Handling (RMS/Peak): 350W/1000W
• Power Range (RMS): 150W-350W
• Frequency Response (Hz): 28Hz-200Hz
• Diaphragm Material: Kevlar-reinforced Pulp Fiber
• Diaphragm Design: 2-piece structural parabolic
• Surround Material: Injection moulded Santoprene
• Surround Design: High Amplitude Multi-Roll (Patent Pending)
• Spider Material: Nomex
• Spider Design: Progressive
• Voice Coil Material: 180˚C High Temp Wire on Spiral Cut Aluminium Former
• Voice Coil Design: 4-Layer Dual Voice Coil
• Motor Structure Pole Geometry: Compound Radius Curve
• Motor Structure Configuration: Integration Shorting Sleeve with Radial Vented VC Heat Transfer
• Magnet Material: High-Power Strontium Ferrite
• Magnet Configuration: 6-Piece (8″) / 10-Piece (10″/12″) Radially Segmented, Double Stacked
• Frame Material: Cast Aluminium
• Frame Design: Single-Piece Casting with Airflow Management System
• Terminals Layout: One-sided
• Terminals Design: Heavy Duty 8ga, Push with housing, Banana Sockets for VC Configuration Jumpers
• Tinsel Leads Design: Reinforced Layer Spider Integration
• Gasket Design: Concealed Mount Gasket System and Integrated Grill Ready

ELECTRO-MECHANICAL PARAMETERS

• Nominal Impedance: 2ohms+2ohms
• Frequency Response: 28-200Hz
• Sensitivity (SPL @ 1W/1m): 83.5dB
• D.C Coil Resistance (Re): 1.85ohms +1.85ohms
• Inductance (Le) 1kHz/20kHz: 0.87mH/0.30mH
• Free Air Resonance (Fs): 38Hz
• Equivalent Stiffness (Vas): 12L (0.42 ft³)
• Mechanical Q (Qms): 7.8
• Electrical Q (Qes): 0.55
• Total Q (Qts): 0.50
• Xmax10 (One-Way Xmax @ 10% Distortion): 14mm
• Mechanical Excursion, Peak-to-Peak: 52mm
• Gap Height (Hag): 10mm
• Coil Height (Hvc): 29mm
• Cone Area (Sd): 201 cm²
• Voice Coil Diameter: 40mm (1.6″)
• Magnet Weight: 52oz