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Alpine SBR-S8D4.2 900W 8” Compact Subwoofer (with included grille | SWR-823D Pre-installed)
by Alpine
$349.00
SKU SBR-S8D4
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
