Dual 12-in sub bass cones in a "clam shell" configuration, vented

SB730 Subwoofer


The SB730 is designed to be flown as a companion to KF730 Line Arrays, but is suitable for other applications requiring high output at low frequencies in a highly compact format. Used in arrays of two or more, the SB730s couple to extend the low frequency response.

The unique enclosure shape both enhances the acoustical performance and serves to provide a solid base for a ground-stacked KF730 array. The SB730 enclosure is 1.5 times the height of a KF730, which allows attractive KF730/SB730 arrays to be assembled in a 3:2 ratio.

The “clam shell” arrangment of its two, advanced design, 12 inch woofers provides tighter driver coupling to increase output and maximize LF “punch”. A massive port radiates the considerable energy needed at the enclosure’s tuning frequency to complement the KF730s output at other frequencies.

Several different wiring configurations are permitted. In addition to Neutrik® NL4 input and loop-through connectors, an NL8 connector accepts amplifier outputs for both SB730s and KF730s using a single amplifier rack cable. Additional SB730s and KF730s are then daisy chained from one SB730. This allows powering up to eight KF730s and four SB730s with just four amplifier channels.

The enclosure features integral skids and companion recesses so that enclosures interlock to stabilize stacked SB730s. Heavy duty handles and an optional caster pallet facilitate transporting.

Six year warranty.

  • Engineered to complement flown or stacked KF730 arrays
  • High output to size ratio from custom-designed 12 in drivers
  • Extended response to 33 Hz
  • Integral lightweight fly hardware of 6061-T6 structural aluminum



Transducer: SUB 2x 12 in. cone

Loading: Vented

Amplifier Channels: Single-amp Sub1/2; Dual-amp Sub 1, Sub 2

External Signal Processing: DSP w/1-way filter


Operating Range (-10 dB, Hz)

33 – 155

Axial Sensitivity (1W @ 1m, dB SPL)

Sub: 96 (Whole space)

Power Handling / Impedance (Watts @ Ohms)

Sub – Single Amp: 1200 @ 4

Sub – Parallel: 600 @ 8 (2x)

Calculated Maximum Output Peak (dB SPL)

Sub (whole space): 133

Calculated Maximum Output Long Term (dB SPL)

Sub (whole space): 127





SB730 Black 0006279

Accessories Part Number
KF730/737 Caster Pallet [PLT73K]
KF730/737/SB730 Fly Bar [FB173]
KF730/737 Pull Bar [PB173]
KF730/737/SB730 Spare Pin [QRP2

Dimensions (inches/millimeters)

Height: 19.50/495.3

Width: 28.50/723.9

Depth: 27.25/692.2

Weights (pounds/kilograms)

Net: 111/50

Shipping: 124/56