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FLEX 918A

18” Hyper Vented Subwoofer

  • 134dB MAX SPL
  • 30 Hz – 400 Hz frequency response
  • 4-inch Voice Coil
  • 2800W Peak / 1400W RMS
  • Class D Amplifier
  • DSP-controlled input section
  • Multi configurations w/ FLEX
  • Baltic Birch Cabinet
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134dB Max SPL

This level of output is extremely loud — suitable for large venues, outdoor concerts, nightclubs, theaters, or large-scale PA systems. Flex 918A can project low-frequency energy over long distances without distortion or loss of clarity.

 

Frequency Response
30 Hz to 400 Hz

Flex 918A  is tuned for sub-bass and bass frequencies.
30 Hz: Reaches into the sub-bass range — the frequencies you feel as much as hear (e.g., deep rumbles, kick drums).
400 Hz: Covers the upper bass and low midrange, helping to maintain warmth and body in sound systems, but not extending into full vocal intelligibility or treble.

Multiple Configurations

FLEX 918A

Optimize the sound system’s performance for different configurations, venues, and acoustic goals

  • Flexibility: You can tailor the system for indoor/outdoor use, audience size, stage placement, etc.
  • Improved Sound Quality: Better frequency response and coverage patterns.
  • Efficiency: More controlled energy dispersion, reducing wasted power and avoiding noise complaints.

Low-Pass Filter (LPF) Presets

 (1–4: 80Hz to 120Hz)

These control the upper frequency limit that the subwoofers output:

  • Lower LPF (e.g., 80Hz) Useful for systems with larger main speakers that handle more low-end, reducing overlap and potential phase issues.
  • Higher LPF (e.g., 120Hz) Useful when the main speakers smaller and need the subs to cover more of the low-mid range.
  • Helps in achieving better crossover integration between subs and tops.

Preset 5: End Fire

1.2M

  • A subwoofer array configuration designed to increase forward sound projection and reduce rearward energy (cardioid effect).
  • Used to minimize low-frequency spill on stage or behind the array—beneficial in live sound setups.

Preset 6: Inverted Stack

Inverted + Stack

  • Uses phase manipulation and driver orientation to create directional control.
  • Improves bass directivity and cancels out low frequencies behind the stack.
  • Often used in venues where rear noise rejection is important.

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Flex 918A
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Flex 918A

$1,499.99

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Description

Unleash Deep, Thunderous Bass with Precision

Experience unmatched power and clarity with our 18” Hyper Vented Subwoofer, designed to deliver 134 dB Max SPL, and an extended 30 Hz – 400 Hz frequency response for deep, room-shaking bass. Whether you’re powering a live event, a club, or a professional audio setup, this subwoofer ensures a rich, distortion-free low-end that resonates.

Equipped with a 4.0” voice coil and a Class-D amplifier pushing 2800W Peak / 1400W RMS, this powerhousedelivers high-efficiency performance with minimal heat buildup, ensuring reliability even in the most demanding environments. The DSP-controlled input section features selectable presets, including cardioid configurations, allowing you to customize output for optimal sound control and directionality.

Built for flexibility, this subwoofer seamlessly integrates into multiple configurations with FLEX, making it an ideal choice for modular setups. Housed in a premium Baltic Birch cabinet, it offers superior durability, excellent acoustic performance, and road-ready toughness for touring professionals.

Take your sound system to the next level with a subwoofer that combines raw power, precision tuning, and rugged design—ensuring your bass is not just heard but felt.

  • ▸ 134dB MAX SPL
  • ▸ 30 Hz – 400 Hz frequency response
  • ▸ 4-inch Voice Coil
  • ▸ 2800W Peak / 1400W RMS
  • ▸ Class D Amplifier
  • ▸ DSP-controlled input section
  • ▸ Multi configurations w/ FLEX
  • ▸ Baltic Birch Cabinet

Download the Flex 918A Brochure

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