F18+ & F18-Slave Subwoofer

Description

F18 Details and Specifications:

Amplifier & Controls (F18+):

• 4000W continuous power amplifier (with slave connected)
  • 1400W continuous power as a single unit
  • Capable of driving our passive F18-Slave to the same levels as a single F18+
  • 4 Conductor Neutrik SpeakON connection for powering optional slave unit
  • US designed, high current, high duty cycle, class D amplifier design
  • High efficency of up to 95% for maximum power from available home circuitry
  • Fully Manufactured in the USA (board level up)
  • Nominal 120V operation (HP i+/F2i+ version available for 208-240V operation)
  • IEC Power Cord (10′ length included) – right angle plug available
• Connection options
  • 12V trigger and auto sensing – 3.5mm mini-cable connection
  • LED indicator for power, standby or error codes.
  • XLR -Female input (LFE/mono) with looping, XLR – Male output (internal Y connection)
  • 2 summed RCA inputs for LFE or Stereo inputs
• Digitally programmable, detented, control knobs for precision adjustment and tuning
  • GAIN (volume) control – wide range for matching any system
  • LF Adjust (low shelf/adjust extension/room sizing) enabling adjustment of low frequency extension from 12Hz to 27Hz or +/- 8dB shelf (see graphs).
  • Low pass crossover 30-120Hz + 200Hz, precise, digital, Linkwitz-Riley 4th Order fitlers (24dB/oct)
  • Delay adjustment – 0-20ms for multiple subwoofer blending

• Proprietary DSP performance optimization
  • Smooth anechoic/outdoor frequency response
  • Carefully optimized, proprietary overload protection – never fear for the well being of your subwoofer while the F18 maintains composure to much more intense playback levels
  • Smooth power response to 200Hz for seamless crossover and articulation with compact speakers
  • Shallow sealed roll off maintained in all LF Adjust settings
  • Shallow low frequency roll off typically yields 7-10Hz in-room extension
  • LF Adjust shelving & room size adjustment allow for a best fit with large to small rooms or adjusting to personal preference after room correction.

Drivers & Design:

• 18″ sealed subwoofer
• High excursion 18″ driver with 3” Voice Coil
• Durable and strong inverted dish cone consisting of 2 layers woven fiberglass sandwiching a Nomex honeycomb
• Cast 12 spoke basket with large under spider venting
• Extended pole with dual aluminum shorting rings for low distortion at all power levels
• Under spider venting and large pole vent for low operational noise and thermal cooling

Enclosure:

• Common enclosure to ensure matching in driver output
• Locally produced with custom-tooled lock mitered construction
  • Pre-veneered shell cut by high precision CNC router
  • Pre-veneered sheet is machined pressed for superior veneer adhesion
  • Lock mitered joints insure perfect alignment, increased joint strength, and sharp veneer edges.
  • Matte black, decoupled 1.25” beveled face for woofer protection, baffle damping, and aesthetic appeal
  • Interlocking braces enhance strength and precision of the enclosure while controlling panel vibrations
  • Removable feet with counter-bored, M6 hardware allows for optional spikes or a flat bottom for stacking
  • Selection of available wood species and stain options
• Magnetically secured grills with no pegs to break or see when the grills are off
• Dimensions 24.25″ H x 23.5″ W x 18″ D (including feet and magnetically attached grill)
• Dimension Drawing (link to PDF)
• Weight: 115 lbs (F18+)
• Shipping Dimensions: 28″ W x 22″ D x 30″ H, 128 lbs

Acoustic Details:

• Internal 4000W/1400W amplification (with slave/indiviually)
• Anechoic response:
  • +/-3dB from 18Hz to 200Hz outdoor response (LF Adjust @ 12 o’clock)
  • +/-3dB from 12Hz to 200Hz outdoor response (LF Adjust @ full clockwise)
  • +/-3dB from 27Hz to 200Hz outdoor response (LF Adjust @ full counter-clockwise)
• 24dB/Octave CROSSOVER selectable from 30-120Hz and Bypass
• 0-20ms DELAY adjustment for blending front/rear subwoofer sets
• Typical in-room extension to 7-12Hz