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Altec Lansing

Altec Lansing ALX-S18P 18" Powered Subwoofer

699.95 $699.95
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Class-D amplification and an 18" driver.

This powerful front-firing active subwoofer is perfect for virtually any performance space—from intimate lounges to high-intensity dance clubs. With onboard Class-D amplification turning out 800W RMS (1,600W peak) output, the ALX-S18P definitely makes its presence known, no matter where you use it. Its massive 18" low-frequency driver incorporates a high-temperature, 3" voice coil, pushing out tons of satisfyingly deep bass at a high SPL.

Nothing can round out your sound system like a subwoofer—especially a subwoofer with an 18" woofer. The ALX-S18P brings out the low end notes in your music that you didn't even realize were there, and gives you the power to penetrate a large, packed dance floor with rich, full music.

Altec Lansing designed the ALX-S18P powered subwoofer to withstand demanding professional use, housing it in a robust, premium-grade, multilayer plywood enclosure.

The ALX-S18P features an integrated adjustable low-pass filter, phase control and output level control, so you can completely customize your sound in any setting.


  • 18" driver with 3" voice coil
  • Robust, dense plywood enclosure
  • Class-D amplifier with 800W RMS output
  • Integrated low-pass filter, phase control
  • Includes Flyware hardware for flown installations

Get some bass in your life—order today.


ALX-S18P 18" Powered Subwoofer Specifications:

Speaker Configuration
  • Active/passive: Active
  • Type: Subwoofer
  • LF driver: 18"
  • MF driver: Not applicable
  • HF driver: Not applicable
  • Amplifier class: D
  • Wattage: 800W RMS/1,600W peak
  • Mixer/preamp: Not applicable
  • Frequency response: Not specified
  • Coverage pattern: Omnidirectional
  • Max SPL: 131dB
  • XLR: Not specified
  • TRS: Not specified
  • TS: Not specified
  • RCA: Not specified
  • SPEAKON: Not specified
  • XLR: Not specified
  • TRS: Not specified
  • TS: Not specified
  • RCA: Not specified
  • SPEAKON: Not specified
  • Cabinet material: Plywood
  • Width: Not specified
  • Height: Not specified
  • Depth: Not specified
  • Weight: Not specified
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  • Orders placed before 5 p.m. ET usually ship the same business day.
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