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SubMersive HP+ & HP-Slave Subwoofer


The SubMersive HP+ is a high power subwoofer solution utilizing a pair of 15″ sealed woofers on opposite faces of the enclosure.  Each HP+ unit with its 4,000W amplifier can power not only its own pair of sealed 15″ woofers, but also and additional SubMersive HP-Slave unit.  In-room extension to below 10Hz is possible in the largest to the smallest of spaces.  Slave units can be placed separately from the HP+ unit such as one HP+ in the left front corner, and a connected HP-Slave unit in the front right corner, or units can be stacked for greater headroom from the same footprint.

SKU: F18PA-2 Category:


SubMersive HP+ & HP-Slave Details and Specifications:

Amplifier & Controls:

  • 4000W continuous power amplifier (with slave connected)
    • 2400W continuous power as a single unit
    • Capable of driving our passive SubMersive HP-Slave to the same levels as a single HP+
    • 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 SubMersive maintains composure to much more intense playback levels
    • Smooth power response to 200Hz for seamless crossover with compact speakers
    • Shallow sealed roll off maintained in all LF Adjust settings
    • Shallow low frequency roll off typically yields 8-12Hz in-room extension
    • LF Adjust shelving & room size adjustment allow for a best fit with large to small rooms

Drivers & Design:

  • Dual opposed 15″ sealed subwoofer
  • Same acoustic performance as SubMersive F2+
  • Custom designed 15” woofer with 3” VC
  • Cast 12 spoke basket with large under spider venting
  • Kevlar-reinforced paper cone
  • Extended pole for lower distortion
  • Vented magnetic gap for low operational noise and thermal cooling
  • Made in USA


  • 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 sharp edges and matched wood grain wrapping around the visible front, top, and rear.
    • 1.5” thick driver mounting baffles
    • Full windowed bracing with dual-opposed cabinet to eliminate enclosure vibration
    • Opposed force configuration of drivers insures zero walking or rocking of enclosure
    • 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″ W x 17.5″ D x 25.5″ H (Link to PDF) (including feet & grills)
  • Weight: 120 lbs
  • Shipping Dimensions: 28″ W x 22″ D x 30″ H, 130 lbs


Acoustic Details:

  • Internal 4000W/2400W amplification (with slave/indiviually)
  • Anechoic response:
    • +/-3dB from 19Hz 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

Additional information

Weight 128 lbs
Dimensions 28 x 22 x 30 in
SubMersive HP+(powered) or HP-Slave

SubMersive HP+ with 4000W internal amplifier, SubMersive HP-Slave

Cabinet Veneer

Black Maple, Black Oak, Rosenut, Espresso Cherry, Vintage Cherry, Golden Cherry, Clear Maple


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