SoundXtreme 7-Band Passive Stereo Graphic Equalizer

The ST-EQ-180 gives you tactile slide controls and a simple fader layout to sculpt mid, low and high frequencies without adding active coloration. This passive design maintains the character of your source while providing up to ±12 dB of boost/cut at seven musical center frequencies. Built for inline use in car audio or compact rigs, it includes a selectable subwoofer crossover and level/fader adjustments so you can tune balance and low-end response from the dash or rack.

How will the seven bands change my system’s sound?

Each slider targets a defined center frequency so you can attenuate or accentuate specific tonal areas — from deep bass to shimmering highs. Because the unit is passive, it reduces the risk of adding unwanted distortion, preserving the original sonic signature while giving control over problematic or desirable ranges.

• Center frequencies: 60, 150, 400, 1k, 2.5k, 6k, 15k Hz for musical precision
• Equalization range: ±12 dB per band for subtle to dramatic shaping
• Passive circuitry avoids extra coloration and keeps dynamics intact

What do the fader and subwoofer controls let me do?

The integrated fader lets you shift output balance between left and right channels, useful for front/rear or side adjustments in vehicles or compact venues. The dedicated subwoofer crossover and switch allow you to route and tame low frequencies, making it simpler to integrate an external subwoofer without additional modules.

• Fader control for left-right level tuning and seating-balance correction
• Subwoofer crossover with selectable rolloff to protect mids from bass bleed
• Subwoofer on/off switch for quick A/B listening or bypass

What are the technical specs and installation needs?

The ST-EQ-180 works across the audible spectrum and accepts typical car audio voltages, making it compatible with most aftermarket setups. It’s engineered for a straightforward inline connection: set input sensitivity and power it from 11–16 V DC for reliable operation in vehicles and small systems.

• Frequency response: 20 Hz–20 kHz with stated EQ accuracy
• Input impedance: 100 ohm; input sensitivity: 4 V for 500 mV output
• Power requirement: 11–16 V DC; crossover slope: 12 dB/octave

How does passive design affect performance and compatibility?

Passive equalizers shape signal without active amplification, which means they rely on the source signal level and downstream gains. This results in lower noise and minimal signal coloring, but requires proper gain staging to retain headroom and prevent level loss in some installations.

• Low noise and natural sound due to absence of active circuitry
• Requires proper gain staging to avoid level reduction in long signal chains
• Ideal for systems where preserving source fidelity is a priority

Who this is for: The SoundXtreme ST-EQ-180 suits installers, car audio enthusiasts and small-system engineers who want precise manual control over seven musical bands plus fader and subwoofer management. Choose this unit if you prefer a hands-on graphic equalizer that preserves your source tone, simplifies sub integration, and fits into 11–16 V DC installs where tactile sliders and clear frequency targets make fast, repeatable tuning easy.