Nakamichi NSE1318 5.25" 2-Way Coaxial Speakers - Ultra-Shallow Mount

Experience larger speaker performance in shallow spaces—5.25" coaxial speakers with exceptional 40.6mm mounting depth.

Product Overview

The Nakamichi NSE1318 is a premium 5.25-inch (13.3cm) 2-way coaxial speaker system engineered for shallow-mount installations requiring larger driver surface area than 4-inch speakers. Delivering 150W peak power and 25W continuous N-Power with an impressive 82Hz-19.5kHz frequency response, these speakers provide significantly deeper bass extension and higher output capability than compact 4-inch alternatives. The ultra-shallow 40.6mm mounting depth—exceptional for 5.25-inch speakers—allows installation in door panels with window mechanisms close to mounting surface, rear deck locations with limited clearance, and factory 5.25-inch positions in vehicles where standard 50-70mm depth speakers won't fit. Featuring 87dB sensitivity, 4-ohm impedance, precision 20.4mm ASV voice coil, and 113g magnet assembly, the NSE1318 delivers clear, dynamic audio reproduction with efficient power usage. At just 0.6kg per speaker despite the larger 5.25-inch cone, installation remains straightforward in space-restricted locations—perfect for upgrading factory speakers in modern vehicles, compact cars, and installations where mounting depth is limited but superior bass response and output compared to 4-inch speakers is desired.

Key Specifications

• 5.25-inch (13.3cm) 2-way coaxial speaker system
• 150W peak power handling
• 25W continuous N-Power (RMS equivalent)
• Extended frequency response: 82Hz - 19.5kHz
• 87dB ± 3dB sensitivity
• 4Ω impedance
• Ultra-shallow mounting depth: 40.6mm (1.6 inches)
• 20.4mm ASV (Aluminium Silicon Voice Coil)
• 113g (4oz) magnet assembly
• Lightweight construction: 0.6kg per speaker
• 2-way design (woofer + integrated tweeter)
• Universal fitment for 5.25-inch mounting locations

Features & Benefits

Exceptional Shallow Mounting: Industry-leading 40.6mm depth for 5.25-inch speakers fits door panels with window regulators positioned close to mounting surface, rear deck installations with trunk lid clearance issues, and factory locations in modern vehicles designed with minimal speaker depth—solves fitment problems that eliminate most 5.25-inch speaker options requiring 50-70mm clearance.

Superior Bass Extension: 82Hz low-frequency response delivers significantly deeper, more impactful bass than 4-inch speakers (typically 110Hz+)—reproduces bass guitar fundamentals, kick drum weight, and electronic music sub-bass with authority that smaller drivers cannot match, transforming music listening during highway cruising and daily commuting.

Larger Cone Area Advantage: 5.25-inch cone provides approximately 70% more surface area than 4-inch drivers—moves more air for higher maximum volume, better bass output, and more dynamic sound without requiring external amplification, ideal for factory headunit upgrades or moderate aftermarket systems.

High-Efficiency Performance: 87dB sensitivity ensures these speakers produce strong volume from factory headunit power (typically 15-25W per channel)—works exceptionally well without aftermarket amplifier requirements while offering upgrade path to powered systems later without speaker replacement, protecting your investment.

2-Way Coaxial Design: Integrated tweeter mounted on main woofer cone provides proper high-frequency dispersion and wider soundstage compared to full-range drivers—delivers detailed, three-dimensional sound with better imaging for improved listening experience whether enjoying podcasts, navigation instructions, or favourite playlists.

Professional Voice Coil Engineering: 20.4mm ASV (Aluminium Silicon) voice coil construction provides efficient thermal management and controlled excursion—maintains clear reproduction even at higher volumes during extended listening sessions without distortion or thermal compression on long regional drives or daily work commutes across Australian cities.

Lightweight Installation Simplicity: Despite 5.25-inch size, weighs just 0.6kg per speaker—door panel installations won't overload thin factory mounting plates or create panel resonance, DIY installation is manageable without professional equipment, and mounting hardware stress is minimal ensuring long-term reliability.

Universal 5.25-Inch Fitment: Standard 133mm mounting diameter fits factory 5.25-inch locations in countless modern vehicles including popular Australian models—replaces worn factory speakers in Mazda 3, Toyota Corolla, Honda Civic, VW Golf, and numerous other vehicles with 5.25-inch door or rear deck speaker positions.

Technical Specs

• Type: 2-way coaxial speaker system
• Size: 5.25 inches (133mm nominal diameter)
• Configuration: Woofer with integrated coaxial tweeter
• Peak Power Handling: 150W
• Continuous N-Power: 25W (RMS)
• Frequency Response: 82Hz - 19.5kHz
• Sensitivity: 87dB ± 3dB (1W/1m)
• Impedance: 4Ω
• Mounting Depth Required: Greater than 40.6mm (1.6 inches)
• Mounting Diameter: 133mm (5.25 inches, verify exact cutout)
• Voice Coil: ASV (Aluminium Silicon) 20.4mm diameter
• Voice Coil Former: High-temperature resistant material
• Magnet Type: Ferrite
• Magnet Mass: 4oz (113g)
• Tweeter: Integrated coaxial design
• Cone Material: Not specified (verify from product)
• Surround Material: Not specified (verify from product)
• Basket Material: Stamped steel or polymer (verify from product)
• Connections: Push terminals or spade connectors (verify)
• Net Weight: Approximately 0.6kg per speaker
• Quantity: Sold as pair (verify packaging)

Frequently Asked Questions

How is the mounting depth so shallow for a 5.25-inch speaker?

Nakamichi engineered the NSE1318 specifically for shallow-mount applications using compact magnet assemblies and efficient motor design. At 40.6mm, it's shallower than most 4-inch speakers despite the larger cone—perfect for modern vehicles with window mechanisms, airbags, or structural components limiting depth behind door panels and rear deck locations.

Will these provide better sound than 4-inch speakers in my vehicle?

Yes, if your vehicle accommodates 5.25-inch diameter. The larger cone provides deeper bass (82Hz vs 110Hz), higher maximum volume, more dynamic range, and better overall sound quality. However, you must verify both mounting diameter (133mm) and depth (41mm+) clearance—if only 4-inch diameter fits, the NSE1018 is your option.

Can these work with my factory stereo system?

Absolutely. The NSE1318 is designed for factory headunit compatibility with 87dB sensitivity and 25W continuous power rating. Factory headunits typically output 15-25W per channel—these speakers will perform excellently on factory power while delivering significant improvement over worn or basic factory speakers in clarity and bass response.

What vehicles commonly use 5.25-inch shallow-mount speakers?

Common applications include: front door speakers in Mazda 3/6, Toyota Corolla, Honda Civic/Accord, VW Golf/Jetta, Subaru Impreza/Outback, Nissan Pulsar, and many modern sedans and hatchbacks. Rear deck speakers in coupes and sedans often use 5.25-inch as well. Always measure your specific vehicle's mounting location before ordering.

Do I need an amplifier to power these speakers properly?

Not necessarily. These speakers work well on factory headunit power (15-25W) or moderate aftermarket headunit power (25-40W). However, adding a 4-channel amplifier (50-75W per channel) will unlock their full potential with increased dynamic range, better bass control, and higher clean volume levels for serious listening enjoyment.

Compatible With / Goes Well With

Common Installation Locations:

• Front door speaker positions (most common application)
• Rear door speakers (4-door vehicles)
• Rear deck/parcel shelf installations (sedans, coupes)
• Factory 5.25-inch locations with depth restrictions
• Custom installations requiring shallow mounting

Popular Vehicle Applications:

• Mazda 3, Mazda 6 (front and rear doors)
• Toyota Corolla, Camry (door speakers)
• Honda Civic, Accord (door positions)
• Volkswagen Golf, Jetta (front doors)
• Subaru Impreza, Outback, Forester (various positions)
• Nissan Pulsar, Maxima (door and deck)
• Holden Cruze, Astra (door speakers)
• Hyundai i30, Elantra (door positions)

Essential Installation Accessories:

• 5.25-inch speaker adapter plates (vehicle-specific)
• Speaker wire (16-gauge minimum, 14-gauge recommended)
• Wire connectors or solder/heatshrink
• Speaker baffles or foam gaskets (improved sealing)
• Sound deadening material for door panels
• Panel removal tools for safe disassembly
• Cable management ties

Compatible Headunits:

• Factory OEM headunits (15-25W per channel)
• Aftermarket headunits (22-50W per channel)
• Apple CarPlay/Android Auto headunits
• Classic car radio replacements
• Digital media receivers

System Enhancement Products:

• 4-channel amplifier (50-75W per channel for improved dynamics)
• Component speakers for front stage upgrade (better imaging)
• 6.5-inch speakers for rear if depth allows (fuller bass)
• Subwoofer to extend low-frequency response below 82Hz
• Sound deadening (Dynamat, STP) for tighter bass
• Digital sound processor for tuning and crossover control

Caution: Verify both mounting diameter (133mm) AND depth clearance (41mm minimum) before ordering. Measure carefully—window regulators, door locks, airbag components, and structural bracing can interfere with speaker installation. If depth is insufficient, these speakers won't fit safely. Always test-fit before final installation and verify no interference with window operation.

Weight

0.6kg per speaker.