Infinity Primus 693M 6"x9" 3-Way Speakers

The Infinity Primus 693M is a pair of 6"x9" 3-way car speakers designed for replacing factory speakers or building a straightforward vehicle-audio upgrade. They provide a larger-format speaker option for vehicles with compatible 6"x9" mounting locations. With 60 watts RMS power handling per speaker, they can be matched with an appropriate aftermarket receiver or amplifier.

These speakers are intended for listeners who want clearer everyday playback from a full-range speaker pair without adding separate component tweeters and crossovers. The 93 dB sensitivity rating supports useful output from modest-power systems. Their 50 Hz to 20 kHz frequency-response specification covers bass, midrange, and high-frequency playback within a single 3-way speaker assembly.

A 6"x9" polypropylene woofer handles the main low- and mid-frequency range, while a 3/4" silk-dome tweeter is used for high-frequency detail. The speaker's crossover point is specified at 5 kHz with a 6 dB-per-octave slope. This design is suited to a practical replacement upgrade where balanced full-range sound is the goal.

Infinity's Plus One woofer-cone architecture increases usable cone area compared with conventional cones in its class. The manufacturer specifies up to 35% more cone area, which is intended to support sensitivity and low-frequency output. A vented basket frame promotes voice-coil cooling as the speaker operates.

The Primus 693M is a 3-ohm nominal-impedance design, so system matching matters when selecting an amplifier or replacement head unit. Check the vehicle's speaker opening, mounting depth, and the connected source or amplifier's 3-ohm capability before installation. The package includes installation hardware, grilles, foam gasket material, and short speaker pigtail cables for a more complete replacement-speaker installation.

Key Features

• 6"x9" 3-Way Design: Provides full-range sound from a pair of vehicle speakers.
• 60W RMS Handling: Supports continuous power up to 60 watts per speaker.
• Plus One Cone: Uses increased cone area for efficient low-frequency output.
• Silk-Dome Tweeter: Adds high-frequency detail with a 3/4" dome.
• 3-Ohm Impedance: Designed for compatible aftermarket car-audio systems.
• Vented Basket Frame: Helps move heat away from the voice coil.

Design & Installation

The Primus 693M uses a polypropylene 6"x9" woofer, a 3/4" silk-dome tweeter, and a super-rigid vented basket. Its all-black presentation is complemented by included grilles, while the basket ventilation is designed to aid voice-coil cooling. Infinity specifies a frequency response of 50 Hz to 20 kHz and a sensitivity of 93 dB at 2.83V/1m.

Install these speakers only in vehicle locations that accept 6"x9" speakers and provide adequate clearance behind the mounting surface. Use the included screws, speed clips, foam gasket, and 18 AWG pigtail cables as appropriate for the vehicle installation, while observing correct polarity. Confirm the connected receiver or amplifier is suitable for a 3-ohm nominal load and keep continuous power within the 60W RMS rating per speaker.