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NAKAMICHI SP-QS618T

Technical Specifications

Feature / Parameter Specification
Speaker Type 6.5” (16.5 cm) 2-Way Coaxial System
RMS Power (N-Power) 25 Watts
Peak Power Handling 160 Watts
Frequency Response 70 Hz – 20,000 Hz (20 kHz)
Sensitivity (1W/1m) 88 dB (± 3 dB)
Nominal Impedance 4 Ohms
Voice Coil ASV Φ 25.5 mm
Magnet Mass 6.0 oz (170 g)
Mounting Depth > 2.1” (53 mm)
Net Weight (Set) Approx. 1.2 kg
SKU: 618T Category:

Nakamichi SP-QS618T 6.5″ 2-Way Coaxial Speaker System, formatted for both the Long Description and Short Description sections of your WooCommerce product page:


Product Description (Long Description)

Elevate Your In-Car Audio with Nakamichi SP-QS618T

Upgrade your vehicle’s factory sound setup with the Nakamichi SP-QS618T 6.5″ (16.5cm) 2-Way Coaxial Speaker System. Engineered as a direct drop-in replacement for worn-out or underpowered OEM factory speakers, this coaxial speaker set delivers exceptional audio clarity, smooth midrange vocal reproduction, and crisp high frequencies.

Featuring a light yet rigid injection-molded composite cone paired with a high-durability rubber surround, the Nakamichi SP-QS618T yields fast transient response with minimal acoustic distortion. With an integrated high-frequency driver, you enjoy detailed treble and clear vocal separation across all music genres without needing an external amplifier.


Key Features

  • Universal 6.5″ OEM Fitment: Standard outer frame dimensions enable direct drop-in mounting into door panels and rear decks of most vehicles.

  • Injection-Molded Composite Cone: Lightweight woofer cone structure delivers punchy mid-bass response and accurate midrange vocal reproduction.

  • Integrated Silk/Dome Tweeter: Smoothly reproduces crisp, detailed high frequencies without listener fatigue or harshness.

  • Durable Rubber Surround: Built to withstand moisture, heat, and extreme cabin temperature variations inside car door panels.

  • High Output Efficiency: Power-efficient design easily runs directly off factory head units or aftermarket car stereos.

  • Package Contents

    • 2 × Nakamichi SP-QS618T 6.5″ Coaxial Speakers

    • 2 × Protective Grille Covers

    • Mounting Screws & Hardware Clips

    • User Manual


    Product Short Description (Bullet Points)

    • 6.5″ Universal Drop-In Fit: Direct replacement for standard factory door and rear shelf speaker slots.

    • Composite Woofer Cone: Produces tight mid-bass response and clear midrange vocals.

    • Integrated High-Frequency Tweeter: Delivers crisp, detailed treble with minimal acoustic distortion.

    • Durable Rubber Surround: Weather-resistant build ensures long-lasting in-door durability.

    • High Output Efficiency (160W Peak / 25W RMS): Powers easily directly off factory head units or aftermarket stereos.

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