Product Overview
About: Skar Audio SDR-18 18" 600W RMS Car Subwoofer
The Skar Audio SDR-18 subwoofer was designed to redefine the term "daily" subwoofer, both in terms of power output and acoustic responsiveness across the entire low end frequency range. The engineering considerations that went into developing this 18-inch subwoofer are extensive, and contribute to why the SDR series has continued to be one of the most popular subwoofer lines we have ever released.
Featuring a 2.5" 4-layer high temperature copper voice coil, the SDR-18 can operate at peak performance for hours on end with the peace of mind knowing that it can handle the brutality. Combine that with the top-tier, high flux ferrite motor of this driver, and it is by no surprise that this subwoofer can reproduce low end bass frequencies with authority. Furthermore, we integrated a unique red nomex spider suspension system into the design that utilizes the perfect blend of stiffness and flexibility. The aforementioned components of the SDR-18 as well as its advanced air flow cooling design, are what ultimately allow for the incredible responsiveness & power handling of this subwoofer.
Product Highlights:
- Voice Coil Size: 2.5"
- RMS Power Handling: 600 Watts
- Peak Power Handling: 1,200 Watts
- Voice Coil Configuration: Dual 2 Ω (D2) or Dual 4 Ω (D4)
Specifications:
- Size: 18"
- Type: Car Subwoofer
- Cone Type: Competition Grade Pressed Paper Cone
- RMS Power: 600 Watts
- Peak Power: 1200 Watts
- Surround Type: High Roll Foam Surround
- Voice Coil Size: 2.50"
- Magnet Slug Count: Single
- Voice Coil Layers: 4
- Voice Coil Material: Copper (Pure Copper)
- Voice Coil Impedance: Dual 2 Ω (D2) or Dual 4 Ω (D4)
Thiele-Small Parameters:
- Bl Factor (Bl): 17.11 (D2) / 10.69 (d4)
- Free Air Resonance (Fs): 24 Hz
- Dc Resistance (Re): Dual 2 Ω or Dual 4 Ω
- Cone Area (Sd): 1164.1 cm2
- Mechanical Compliance (Cms): 0.107 mm/N (D2) / 0.104 mm/N (D4)
- Mechanical Mass (Mms): 413.0 gr (D2) / 428.8 gr
- Electrical Factor (Qes): 0.80 (D2) / 0.59 (D4)
- Mechanical Factor (Qms): 4.68 (D2) / 4.99 (D4)
- Total Factor (Qts): 0.69 (D2) / 0.76 (D4)
- Equivalent Volume (Vas): 206.0 L (D2) / 200.0 L (D4)
- Excursion (Xmax): 13.5 mm (one-way)
- Sensitivity: 87.3 dB (D2) / 86.7 dB (D4)
Subwoofer Measurements:
- Total Height: 9.10"
- Mounting Depth: 7.95"
- Magnet Diameter: 6.10"
- Cut-out Diameter: 16.55"
- Outside Diameter: 18.31"
Recommended Enclosure Specifications:
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Recommended Port Area:
64.75 in² - Recommended Ported Volume: 4.60 ft³
- Recommended Sealed Volume: 2.75 ft³
- Recommended Tuning Frequency: 32 Hz
