YSQ170 is a subwoofer specifically designed for enhanced low-frequency performance in automotive audio systems. It features a dual voice coil structure (4Ω+4Ω), supporting various wiring methods for flexible amplifier matching. With a resonant frequency of 66Hz and an ultra-low extension down to 30Hz, it delivers deep and powerful sub-bass response. Rated at 50W×2 power output, it offers strong peak handling capability and 81.5dB sensitivity, ensuring high efficiency and low-distortion performance for dynamic audio reproduction. It is the core unit for upgrading automotive bass systems.
Model: YSQ170
Type: Subwoofer (Dual Voice Coil)
Rated Power: 50W + 50W (independent power per voice coil)
Nominal Impedance: (4Ω + 4Ω) ±0.6Ω (supports series connection for 8Ω or parallel for 2Ω)
Maximum Power: /
Resonant Frequency (F0): 66Hz ±13%
Sensitivity: 81.5dB ±2dB
Effective Frequency Range: 30Hz ~ 250Hz
Overall Dimensions: 456.7mm × 288.9mm × 314.6mm
Installation Size: / (requires custom enclosure or mounting bracket)
Advantages of Dual Voice Coil Design
Wiring Flexibility: Supports series connection (total impedance 8Ω), parallel connection (total impedance 2Ω), or separate dual-channel driving, adapting to various amplifier output requirements.
High Space Utilization: Single magnetic circuit with dual voice coils achieves stronger magnetic driving force within a limited volume, enhancing low-frequency control.
Low-Frequency Performance Characteristics
Ultra-Low Extension Capability: Effective frequency as low as 30Hz, capable of reproducing most sub-bass effects in music and audio-visual content.
Reasonable Resonant Point: The 66Hz F0 ensures efficient response in the commonly used low-frequency range (50-80Hz), delivering solid impact.
Smooth Mid-Bass Transition: Frequency upper limit of 250Hz allows seamless integration with mid-bass units, preventing frequency gaps.
System Matching Recommendations
Amplifier Matching: It is recommended to provide ≥50W RMS power per voice coil. Impedance matching should be calculated based on the wiring method (series 8Ω, parallel 2Ω, or independent 4Ω).
Enclosure Design: Requires a custom sealed or ported enclosure. Volume should be calculated based on Thiele-Small parameters; consulting professional design is recommended.
Crossover Settings: Use a low-pass crossover with a recommended cutoff frequency between 80-150Hz, adjusted according to the overall system frequency response.
Installation Precautions
Enclosure Strength: Low-frequency vibrations are intense; the enclosure should use sufficiently thick panels (≥15mm) with reinforced support.
Phase Calibration: Ensure correct polarity when wiring dual voice coils. Conduct phase testing after installation.
Heat Dissipation and Protection: Pay attention to voice coil heat dissipation during high-power operation to avoid prolonged overload. Install a protective grille for the diaphragm.
