BOSS Audio Systems P65.4C 6.5" 4-Way Car Door Speakers

The BOSS Audio Systems P65.4C Phantom are 6.5-inch, 4-way car door speakers built to deliver up to 400 watts peak power and a full-range soundstage for upgraded factory audio systems.

These coaxial speakers pair a polypropylene cone and rubber surround with a cast aluminum basket and multiple tweeters to improve clarity, midrange presence, and high-frequency detail over standard factory speakers. Designed for door or pod installation, the P65.4C units are sold as a matched pair and can be used with stock head units or an external amplifier for higher output. They include a 3-year platinum online dealer warranty when purchased through Amazon, and BOSS recommends professional installation for best results.

How will these speakers change my car’s everyday sound?

The P65.4C speakers provide clearer highs and tighter mids compared with many factory-installed speakers, reducing muddiness and improving vocal presence. Their 4-way design separates frequencies so instruments and voices sit more distinctly in the mix.

• 400W peak power capability for louder playback without distortion at moderate volumes.
• 84 dB sensitivity for efficient output from most factory radios.
• 4Ω nominal impedance to work with common head units and aftermarket amplifiers.

What are the key specs I should know before buying?

Dimensions and electrical specs determine fit and compatibility. The P65.4C has a 6.54" overall diameter and requires a 5.63" installation hole with a 2.48" mounting depth, so confirm door clearance before ordering.

• Frequency response: 65 Hz–22 kHz (±3 dB) for broad coverage of music content.
• 4-way system with a 1.38" midrange and two 0.60" tweeters for layered sound.
• Includes 6 dB/oct high-pass filter to protect low-frequency drivers when bi-amping or bridged to an amplifier.

Will these speakers work with my factory stereo or do I need an amplifier?

They will play with most factory head units thanks to 84 dB sensitivity, but adding an amplifier unlocks cleaner headroom and higher volume without strain. Use an amp if you expect sustained loud playback or if you want tighter bass control.

• Compatible with stock radios at moderate listening levels.
• Pair with an external amp for improved dynamics and reduced distortion at high volumes.
• 4Ω impedance matches common aftermarket amplifier setups.

How durable and easy to install are these speakers?

Construction choices like a polypropylene cone, rubber surround, and cast aluminum basket balance durability and weight. Installation is similar to standard 6.5" coaxial speakers, but professional installation is recommended to ensure secure mounting and correct wiring.

• Polypropylene cone resists moisture and maintains shape under heat variation.
• Cast aluminum basket provides a rigid mounting platform to reduce resonance.
• Sold in pairs and sized for common door applications; check mounting depth and hole diameter before install.

Who is this for? The BOSS Audio Systems P65.4C Phantom speakers suit drivers upgrading factory door speakers who want clearer highs, better midrange definition, and a tougher mechanical build without committing to component speaker systems. They are a practical choice for owners seeking affordable, plug-and-play improvement with the option to add an amplifier later for greater volume and fidelity. If you need slightly more low-end extension or prefer separate component crossovers, consider a component kit; otherwise, these coaxial 4-way speakers are a strong all-around upgrade for daily driving and casual listening.