Nakamichi NSA-CS1721 6.5" 2-Way Component Speakers - Audiophile Performance

Experience true audiophile sound staging with premium component speakers—separate tweeters deliver exceptional imaging and 38Hz bass extension.

Product Overview

The Nakamichi NSA-CS1721 is a premium 6.5-inch (16.5cm) 2-way component speaker system engineered for audiophile-grade sound staging and imaging in automotive applications. Unlike coaxial speakers where tweeter mounts on woofer, true component systems feature separate 25mm silk dome tweeters that mount independently at ear level—providing superior stereo imaging, precise sound staging, and three-dimensional audio reproduction. Delivering 460W peak power and 70W continuous N-Power with exceptional 38-19.5kHz frequency response, these speakers reproduce subwoofer-level bass depth while maintaining pristine midrange and treble clarity through premium external crossovers. Featuring 90dB sensitivity, 4-ohm impedance, professional 30.5mm ASV voice coil, and substantial 343g magnet assembly in 63mm mounting depth woofers, the NSA-CS1721 delivers powerful, detailed audio with excellent power handling. The treated composite paper cone and durable rubber surround ensure consistent performance in Australian conditions. Complete with external crossovers, angle-adjustable tweeter mounting options, grilles, extensive hardware, and gaskets at 2.3kg total weight, this comprehensive system represents professional front-stage audio for serious enthusiasts demanding maximum sound quality from utes, SUVs, sedans, and 4WDs.

Key Specifications

• Premium 6.5-inch (16.5cm) 2-way component speaker system
• 460W peak power handling
• 70W continuous N-Power (RMS equivalent)
• Exceptional frequency response: 38Hz - 19.5kHz
• 90dB ± 3dB sensitivity (high-efficiency)
• 4Ω impedance
• Standard mounting depth: 63mm (2.48 inches)
• 30.5mm ASV (Aluminium Silicon Voice Coil)
• 343g (12.1oz) magnet assembly
• Professional construction: 2.3kg total system weight
• 2-way design (separate woofer + independent 25mm silk dome tweeter)
• Treated composite paper cone
• Durable rubber surround
• External crossovers included
• Complete installation kit with multiple mounting options

Features & Benefits

True Component Design Advantage: Separate tweeters mount independently at dashboard or A-pillar locations at ear level—creates proper stereo imaging with precise instrument placement and three-dimensional sound staging that coaxial speakers cannot achieve, transforming music listening into immersive experience where vocals center perfectly and instruments occupy distinct spatial positions like live performances.

Exceptional 38Hz Bass Extension: Remarkable low-frequency response approaching dedicated subwoofer performance—reproduces deep electronic music sub-bass, kick drum fundamentals, bass guitar low notes, and cinema soundtrack rumble with authority that may eliminate subwoofer necessity in quality systems focused on music rather than earth-shaking SPL competitions.

Premium 25mm Silk Dome Tweeter: Large silk dome tweeter delivers smooth, natural high-frequency reproduction without harshness or listening fatigue—ensures extended comfort during long Australian highway drives with detailed, airy treble that captures cymbal shimmer, vocal nuances, and acoustic subtleties without the piercing quality of cheaper metal dome designs.

High-Efficiency Performance: 90dB sensitivity means these speakers produce strong volume from modest power—works well with aftermarket headunits (30-50W) while truly excelling with external amplification (75-100W per channel), providing flexibility for staged upgrades where speakers install first with amplifiers added later as budget allows.

Professional Voice Coil Engineering: 30.5mm ASV (Aluminium Silicon) voice coil—larger than standard 25.5mm coils in coaxial speakers—provides superior thermal management and controlled excursion, maintaining clear, distortion-free reproduction even at higher volumes during extended listening sessions on long regional drives or outback touring adventures.

External Crossover Networks: Premium external crossovers provide precise frequency distribution, directing low frequencies to woofer and high frequencies to tweeter—ensures each driver operates in its optimal range without overlap or distortion, delivering cleaner, more accurate sound than simple capacitor-based crossovers in basic component systems.

Treated Composite Paper Cone: Lightweight treated paper cone construction combines quick transient response for musical detail with structural rigidity for controlled excursion—delivers tight, accurate bass reproduction and clear midrange vocals without cone flex distortion or breakup, maintaining tonal accuracy across volume levels.

Flexible Tweeter Mounting: Included angle adapters, mounting bases, and adhesive options allow tweeter installation in dashboards, A-pillars, door sail panels, or custom pods—provides positioning flexibility to optimize sound staging for driver and passengers, critical for achieving proper stereo imaging in vehicles with varying interior layouts.

Technical Specs

• Type: 2-way component speaker system (separate woofer and tweeter)
• Woofer Size: 6.5 inches (165mm)
• Tweeter Size: 25mm silk dome
• Peak Power Handling: 460W
• Continuous N-Power: 70W (RMS)
• Frequency Response: 38Hz - 19.5kHz
• Sensitivity: 90dB ± 3dB (1W/1m)
• Impedance: 4Ω
• Woofer Mounting Depth: Greater than 63mm (2.48 inches)
• Woofer Mounting Diameter: 165mm (6.5 inches, verify exact cutout)
• Voice Coil: ASV (Aluminium Silicon) 30.5mm diameter
• Voice Coil Former: High-temperature resistant material
• Magnet Type: Ferrite
• Magnet Mass: 12.1oz (343g)
• Woofer Cone: Treated composite paper
• Cone Surround: Durable rubber
• Tweeter Type: 25mm silk dome (separate)
• Crossover: External passive design (pair included)
• Crossover Point: Not specified (verify from documentation)
• Basket Material: Stamped steel or polymer
• Connections: Push terminals or spade connectors
• Net Weight: Approximately 2.3kg (complete system)
• Quantity: Sold as pair (complete front stage)

Package Includes:

• Woofers x 1 pair (2 units)
• Tweeters x 1 pair (2 units)
• External crossovers x 1 pair (2 units)
• Tweeter angle adapters x 1 pair
• Tweeter mounting bases x 2
• Tweeter mesh grilles (black) x 2
• Mounting screws (Φ4 x 25mm) x 12
• Self-adhesive EVA pads x 2
• Woofer grille nets + frames x 2 sets
• Foam gaskets x 12
• User manual x 1

Frequently Asked Questions

What's the advantage of component speakers over coaxial speakers?

Component speakers separate the tweeter from the woofer, allowing tweeter mounting at ear level (dashboard, A-pillar) for superior stereo imaging and sound staging. This creates precise instrument placement and three-dimensional sound that coaxial speakers cannot achieve. Components are the choice for serious audio enthusiasts prioritizing sound quality over simple installation. Worth the extra effort for front-stage excellence.

Where should I mount the tweeters for best sound quality?

Ideal locations aim tweeters at listening position: dashboard corners angled toward driver/passenger, A-pillar pods aimed at opposite seat, or door sail panels near mirrors. Goal is equal distance from both tweeters to listener for proper imaging. Angle adapters (included) help optimize aim. Avoid locations blocked by steering wheel or pointing at windows causing reflections.

Can these work with factory headunit power or need amplification?

The 70W continuous rating works with quality aftermarket headunits (40-50W), delivering good performance. However, component speakers of this caliber truly excel with dedicated 4-channel amplification (75-100W per channel)—unlocking full dynamic range, superior bass control, maximum clarity, and proper sound staging. External amplifier strongly recommended for serious audio builds maximizing these speakers' potential.

How much deeper is 63mm mounting compared to shallow-mount speakers?

The 63mm depth is moderate—deeper than ultra-shallow models (40-46mm) but shallower than many premium speakers (70-85mm). Most modern vehicles accommodate 63mm in doors easily. Measure from mounting surface to window mechanism, door lock, or structural components. If limited to under 50mm, component systems may not fit; consider premium coaxial alternatives instead.

Do I need professional installation for component speakers?

Strongly recommended. Component installation requires: woofer mounting in doors with proper sealing, running tweeter wires to dashboard/A-pillar, mounting tweeters securely with correct aim, installing external crossovers in protected locations, and verifying polarity/phase. Professional installers ensure optimal sound staging, secure mounting, weather protection, and system tuning. DIY possible for experienced installers with proper tools.

Compatible With / Goes Well With

Ideal Vehicle Applications:

• Front doors (woofers) with dashboard tweeter mounting
• SUVs and utes with A-pillar tweeter locations
• Sedans with door sail panel tweeter options
• Wagons with adequate door depth (63mm+)
• Premium audio builds prioritizing front-stage imaging

Essential Installation Accessories:

• 6.5-inch speaker adapter plates (vehicle-specific)
• Tweeter pods or custom mounts (A-pillar, dash)
• 14-gauge speaker wire (quality OFC copper)
• Wire loom/conduit for tweeter runs
• Sound deadening material (doors, A-pillars)
• Weatherproofing silicone (door installations)
• Electrical tape and heatshrink
• Panel removal tools

Recommended Audio Systems:

• 4-channel amplifiers (75-100W per channel strongly recommended)
• Premium aftermarket headunits with 4V+ pre-outs
• Digital sound processors for advanced tuning
• Active subwoofers complementing 38Hz bass extension
• High-resolution audio sources (FLAC, lossless)

System Enhancement Products:

• 4-channel amplifier (essential for maximum performance)
• Digital sound processor (DSP) for time alignment and EQ
• Active subwoofer for bass below 38Hz
• Comprehensive sound deadening treatment
• Component amplifier brackets/mounting boards
• Bass restoration processor (compressed sources)
• High-current 4-gauge wiring kit

Professional Services:

• Custom tweeter pod fabrication
• Sound staging and time alignment tuning
• Digital sound processor programming
• Competition-grade installation
• Acoustic measurement and optimization

Caution: Component speaker installation is significantly more complex than coaxial replacement. Requires planning tweeter locations, running wires through doors and dash, mounting external crossovers in protected locations, and proper phase/polarity verification. Professional installation strongly recommended unless experienced with car audio. Improper installation results in poor sound staging, cancellation issues, or damaged speakers. Measure door depth (63mm+ required) and plan tweeter locations before purchase.

Weight

2.3kg complete system (woofers, tweeters, crossovers, hardware).