SoundXtreme ST-EQ-180 7-Band Car Audio Equalizer

The SoundXtreme ST-EQ-180 is a 7-band passive stereo graphic equalizer designed for vehicle audio systems. It adds hands-on tonal adjustment between the audio source and the rest of a compatible car audio setup. This is a signal-control component rather than a head unit, amplifier, speaker, or subwoofer.

Its seven slide controls let the listener adjust selected bass, midrange, and treble areas of the audio spectrum. Each band provides up to ±12 dB of adjustment, allowing measured corrections for the vehicle cabin or personal listening preferences. A front-to-rear fader control is also included for systems using separate front and rear speaker channels.

The ST-EQ-180 covers center frequencies from 60 Hz through 15 kHz, providing adjustment across low-frequency impact, vocal-range presence, and high-frequency detail. An adjustable gain control and output-level display support level matching during system setup. These controls help the installer set the processor appropriately before making final amplifier adjustments.

A dedicated subwoofer section includes selectable crossover points and a subwoofer switch. The listed crossover rolloff is 12 dB per octave, helping route the low-frequency portion of the signal for a subwoofer-equipped system. This makes the equalizer suitable for adding tonal control to a system with front, rear, and bass amplification.

The equalizer operates from an 11-16V DC vehicle electrical system and is specified with a 100-ohm input impedance. Its compact listed dimensions make it practical for custom dash, console, or equipment-panel installations where appropriate mounting space is available. It is intended for shoppers who want manual equalization and fader adjustment without replacing their existing audio source.

Key Features

• Seven-Band EQ: Slide controls adjust seven selected audio frequency ranges.
• ±12 dB Adjustment: Provides substantial cut or boost at each band.
• Front/Rear Fader: Adjusts the balance between front and rear channels.
• Subwoofer Section: Includes crossover-point selection and a subwoofer switch.
• Output-Level Display: Gives a visual indication of output level.
• Vehicle Power Range: Operates from 11-16V DC electrical systems.

Design & Installation

The ST-EQ-180 is listed in black and has a compact 4.5 x 7 x 1.4-inch product size. Its front-panel layout combines seven EQ sliders with gain, fader, subwoofer, and output-level functions for direct access during tuning. The manufacturer listing does not specify chassis material or panel construction.

Install the equalizer securely in a dry location that remains accessible for adjustment, while keeping it clear of vehicle controls and the driver’s view. It requires an 11-16V DC supply and should be integrated by a qualified installer or a user familiar with vehicle audio wiring and gain staging. Begin with conservative EQ settings and make small adjustments after matching levels with the connected audio system.