Folded horn supersub

  • 3200 W Peak, 1600 W Programme, 800 W RMS
  • 141 dB Max SPL
  • 8Ω Impedance
  • Folded horn design for long throw low end
  • 30 Hz – 300 Hz Frequency response
  • 2 x Parallel speakON compatible Inputs
  • Textured black paint finish
  • 18mm Plywood construction
  • 4 x 4-way high impact plastic handles
  • Supplied with 4 robust castors
  • Integral 35 mm pole socket


800 watts

18″ folded horn subwoofer

4.0″ voice coil

800 watts AES (RMS)

1600 watts Programme

3200 watts Peak

141 dB Max SPL @ 1 meter



Our passive, single 18″ folded horn subwoofer delivering a massive 141dB (max SPL) .

Delta F18B is supplied with castors so is a surprisingly portable and easily moveable enclosure.  Where significant extension of low frequency output of a sound system is required over middle-long distances the addition of one or more Delta F18B subwoofers will provide high output low frequency enhancement to the overall sound system.

The folded horn design enables the Delta F18B to deliver ground shaking low frequencies over long distances (Unlike direct radiating designs which provide near to middle distance sound).

The Delta F18B is designed to work with an external, active crossover unit. 


Hardware enclosure

The magic of the Delta F18B happens inside with its folded horn design but, externally, the F18B also features practical hardware features.

Delta F18B is supplied with four (4) sturdy and robust castors so is a surprisingly portable and easily moveable enclosure.

There are also 4 carry handles placed top and bottom to help move this subwoofer into the best location.
On the top surface there is even a standard 35mm pole socket allowing for a full range loudspeaker to be placed on a pole.

Check the curves!

Its only a graph but…..  feel it!



Model NameDelta F18B
System TypePassive
ConfigurationFolded horn subwoofer
Frequency Response (+/-3 dB)30 Hz – 300 Hz
Frequency Range (-10 dB)
Sensitivity (2.83 v / 1 m)106 dB
Calculated Maximum SPL @1 m141 dB
System Rated Impedance8 Ω
Low Frequency Transducer
Size470 mm / 18″
Voice Coil Size102 mm / 4″
Rated Impedance8 Ω
LF Power (re:AES2-2012)800 w
System Continuous Power800 w
System Programme Power1600 w
System Peak Power3200 w
Crossover frequency
Input Connector2 x NL4 (speakON Compatible)
Pole Mount35 mm
Handles4 on Sides
Enclosure Material18 mm Plywood
Finishblack paint
Grille Material & Finish
Dimensions – Unpacked
Height914 mm / 36.0”
Width Front609.6 mm / 24.0”
Width Rear609.6 mm / 24.0”
Depth914 mm / 36.0”
Dimensions – Packed
Height1009 mm / 39.72”
Width Front689 mm / 27.12”
Width Rear689 mm / 27.12”
Depth994 mm / 39.13”
Net Weight (kg / lbs)80.5 kg / 177.1 lbs
Gross Weight (kg / lbs)85.2 kg / 187.44 lbs


Delta Media library

(External link to OneDrive library)