Audio Dynamics ADCX413 4" Coaxial Speaker Set

Technical Specifications

*Power ratings calculated using electronic high pass crossover with minimum crossover point of 120 Hz @ 24 dB/octave, 150 Hz @ 18 dB/octave, or 180 Hz @ 12 dB/octave

Coated Paper Cone Technology in Compact Format

Audiophile-Grade Materials in 4-Inch Size

The ADCX413 represents Audio Dynamics' refusal to compromise on sound quality even in ultra-compact applications. After countless listening hours examining cone materials from glass fiber to Kevlar to carbon fiber, Audio Dynamics chose coated paper for its ability to deliver astonishing realism and detailed timbre across the harmonic spectrum—then successfully miniaturized this technology for 4-inch installations.

• Coated Paper Cone — Purpose-formulated paper material with protective coating eliminates resonance peaks and metallic coloration found in polypropylene or aluminum cones
• Harmonic Accuracy — Reproduces overtones and harmonics with exceptional fidelity despite compact size, preserving natural timbre of instruments and vocals
• Natural Damping — Paper's inherent mechanical damping characteristics create warm, organic sound signature that eliminates listening fatigue
• Moisture Protection — Coating provides environmental protection while maintaining acoustic transparency

The 4-Inch Challenge

Achieving natural tonal accuracy in a 4-inch driver is significantly more challenging than in larger formats. The smaller cone area limits maximum output and bass extension, making material selection and motor design critical:

• 25.4mm Voice Coil — Oversized 1-inch voice coil (relative to driver size) provides adequate power handling and control for 80W RMS operation
• Optimized Motor Structure — 2.75" motor diameter maximizes magnetic force within compact envelope
• High-Pass Filtering Required — 120–180 Hz crossover points protect driver from excessive excursion while allowing full-range midbass reproduction within physical limits

20mm Polymer Film Dome Tweeter

Smooth High-Frequency Extension

The ADCX413's center-mounted 20mm (3/4-inch) polymer film dome tweeter provides clear, effortless high-frequency reproduction without the harshness common in compact coaxial speakers.

• Polymer Film Dome — Lightweight diaphragm material extends high-frequency response while maintaining smooth tonality
• Compact Integration — 3/4" (18.39mm) protrusion minimizes risk of damage in tight installations
• Integrated Crossover — Built-in passive crossover ensures proper frequency division without external components
• Balanced Tonality — Tuned to complement coated paper cone's natural midrange character

Ultra-Shallow Mounting: 1.9 Inches

Designed for Space-Constrained Installations

The ADCX413's 1 15/16" (48mm) mounting depth is one of the shallowest in the 4-inch category, making it ideal for installations where depth clearance is severely limited.

• Dashboard Locations — Fits most factory dashboard speaker locations without modification
• Door Panel Installations — Works in doors with minimal depth clearance (window mechanisms, lock assemblies)
• Kick Panel Applications — Shallow depth allows creative placement in kick panels without intruding into footwell space
• Behind-Grille Fitment — 3/4" tweeter protrusion allows installation flush behind factory grilles

Power Requirements & Sensitivity

Amplification Recommended

The ADCX413's 82.95 dB sensitivity is modest—a compromise necessary to achieve compact size and extended frequency response. While it will function with factory head units (25–35W RMS), amplification (50–80W RMS per channel) is strongly recommended to realize the speaker's full potential.

• Factory Head Unit Compatibility — Will produce sound from factory power, but output will be limited
• Amplified Performance — 50–80W RMS per channel unlocks natural dynamics and detail retrieval
• Compact 4-Channel Amplifiers — Pair with modern micro-amplifiers for space-efficient powered systems

Recommended High-Pass Filtering

Due to the 4-inch driver's physical limitations, high-pass filtering is critical for both sound quality and speaker protection:

• 120 Hz @ 24 dB/octave — Recommended for systems with subwoofers; protects speaker from excessive excursion
• 150 Hz @ 18 dB/octave — Balanced approach for most amplified systems
• 180 Hz @ 12 dB/octave — Conservative setting for maximum midrange focus; ideal when using 6.5" or larger midbass drivers elsewhere

Use Cases & Applications

Ideal For:

• Dashboard Replacements — Upgrade factory dashboard speakers without modifying mounting locations
• Center Channel Applications — Create dedicated center channel for improved vocal clarity and staging
• Multi-Way Systems — Serve as dedicated midrange drivers in complex 3-way or 4-way active systems
• Compact Vehicle Installations — Maximize sound quality in vehicles with severe space constraints (convertibles, sports cars)

Competitive Analysis

Expert Review & Rating

Recommended System Configurations

The ADCX413 works best as part of a multi-way system with dedicated subwoofer and midbass drivers. Contact Audio Intensity for system design guidance and amplifier pairing recommendations.

Warranty & Support

• Manufacturer Warranty: Contact Audio Dynamics for warranty details and coverage information
• Audio Intensity Support: Expert installation guidance and system design recommendations—contact Audio Intensity for assistance
• Manufacturer Resources: Full specifications and technical data available at AD Car Audio
• Purchase: Available at Audio Intensity — currently on sale at $79.99 (33% off)

Final Verdict