Have you considered these for your car audio upgrade?
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Product details:
The HELIX IQ W12-DVC2 is a high-output performance subwoofer built around HELIX's Tuneable Mass System, letting installers add or remove tuning mass to shift the driver's resonant frequency and match it precisely to the enclosure. With 750W RMS (1,500W max) on tap, it's built for SPL-focused systems that still need to stay controlled and musical.
Product specifications:
- Series: HELIX IQ
- Chassis size: 300mm | 12"
- Power handling: 750W RMS / 1,500W max
- Voice coil x impedance: 2 x 2Ω (DVC)
- Sensitivity: 90 dB @ 2.83V/1m (87 dB @ 1W/1m)
- Resonance frequency (Fs): 36 Hz (no tuning mass) to 27 Hz (+3 tuning mass)
- Feature: Tuneable Mass System for adjustable Thiele-Small parameters
Dimensions: Outer diameter 327.1mm (12.88") | Installation diameter 281mm (11.06") | Installation depth 144.7mm (5.70")
Downloads: HELIX IQ W12-DVC2 — official datasheet (PDF)
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These will help make your car sound amazing - you won't want to leave the driver's seat!