BP-SD18, 18″ Band Pass Subwoofer – The 18″ Sub Engine



Our BP-SD18 is the smaller brother of the BP-SD21. It is a passive single 18″ subwoofer with unique design. Similar in appearance and design, being the same height and depth so it can be used together with the 21″ Sub Engine. A beast of a box, it has the low frequency output to match its eye-catching appearance. The BP-SD18 boasts near double 18″ output from a box one half the size of one of a double 18″ box.

System Type4th Order Vented Band Pass
Active or PassivePassive
Program Power ( Watts )1200W RMS / 24000W Program
Bi-ampable Electronic Crossover Recommended 4th Order at 35 Hz to 80 Hz
Nominal Impedance (Ohms)8 Ohms
Sensitivity (dB @ 1Watt/1m)104 dB
Max SPL (dB)136
Frequency Response (Hz +/- 3dB)35 Hz – 400 Hz
Crossover Frequency (Hz)35 – 80 Hz – Recommended
Driver ConfigurationSingle 18″ Woofer
LF Driver(s)Single 18″ Woofer 4.5″ voice coil
LF Program Power ( Watts )800 W Continuous, 1600W Program
LF Impedance (Ohms)8
Inputs – Speakon Neutrik 4-pinDual NL4 Speakon, Paralleled
Wheels4 with a caster board
Bar Handles4 handles
Enclosure Materials3/4″ 18-Ply Birch
16 Ga. Perforated Steel
Finish / CoveringDuraBlast polyurea coating
Optional Finish / CoveringOther colors available
Dimensions (DWH xback W, inches)30″ x 22.5″ x 30″
Dimensions (DWH xback W, cm)76 x 57 x 76
Weight (lbs/kg)107 lbs / 49 kg