STX Audio STX-80PXi 8" Super Midrange Speaker

The STX Audio STX-80PXi is an 8-inch super midrange speaker made for amplified car-audio systems that need strong vocal and instrument output. Its 4-ohm design and high sensitivity make it suited to custom door panels, speaker pods, and other dedicated midrange locations. This is a single speaker intended for installers building or expanding a multi-speaker system.

Rated at 720 watts RMS and 1,800 watts maximum power, the STX-80PXi is designed for systems with substantial amplified power available. Its 97 dB sensitivity rating supports high output while helping it reach useful volume with less power than a lower-sensitivity design. Proper amplifier gain setting remains important for clean, reliable operation.

The speaker covers an 85 Hz to 10 kHz frequency range, focusing on the midrange frequencies that carry vocals, percussion, guitars, horns, and much of a music track's presence. This makes it a practical choice for systems using separate subwoofers for low bass and tweeters for upper-frequency detail. It is not presented as a complete full-range speaker solution by itself.

A black pressed-paper cone supports a natural midrange character, while the reinforced steel basket provides a rigid mounting structure. The motor assembly uses a 40-ounce ferrite magnet for the speaker's magnetic drive system. A 1.75-inch high-temperature voice coil is specified for handling sustained playback demands.

With a listed mounting depth of 3.54 inches, the STX-80PXi can be considered for suitable custom panels, enclosures, and pods after verifying available clearance. Its single-driver format lets system designers select the number of speakers that fits their vehicle, amplifier channels, and installation plan. Pair it with correctly matched amplification and appropriate frequency filtering for the intended application.

Key Features

• 8-Inch Super Midrange: Provides dedicated midrange coverage for custom car-audio systems.
• 720W RMS Handling: Supports use with substantial external amplification when properly configured.
• 4-Ohm Impedance: Works with amplifiers rated to drive 4-ohm speaker loads.
• 97 dB Sensitivity: Helps produce strong output from available amplifier power.
• 40-Ounce Ferrite Magnet: Forms part of the speaker's heavy-duty motor structure.
• 1.75-Inch Voice Coil: Uses a high-temperature design for sustained playback demands.

Design & Installation

The STX-80PXi combines a black pressed-paper cone, reinforced steel basket, ferrite magnet structure, and high-temperature voice coil. These materials are specified for a durable midrange driver intended for high-output car-audio applications. The speaker is sold as one individual 8-inch driver.

Confirm the 3.54-inch mounting-depth clearance and the required mounting opening before installation, as vehicle panels and custom pods vary. Use an amplifier compatible with a 4-ohm load and set gains carefully to match the speaker's 720-watt RMS rating. For a balanced system, use suitable frequency filtering and add separate bass and high-frequency drivers as required by the installation design.