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The HR-218/20 is a high performance passive subwoofer designed to work in conjunction with the full range of the HR series, offering a powerful reinforcement for low frequencies.

Medium power, subwoofer cabinet with dual 18” low frequency transducers in bass reflex, direct radiation configuration. 142dB SPL (4000W Program).

This enclosure offers an excellent power-volume-weight ratio, being a very versatile subwoofer in all types of installation projects.

Perfectly suited for:

→  Club & Bar installations
→  Live Sound
→  Theatres
→  Houses of worship
→  Multi media spaces
→  Public address



The HR-218/20 cabinet is constructed from 13-ply premium birch plywood (18mm thickness) and finished with polyurea coating.

Internal design

The internal structure of the HR-218/20 is heavily braced for greater longevity and all parts are assembled on metal inserts with metric screws.

Rigging HR-18-6
Rear panel

A compact powder coated steel panel contains the connectors.

Grill HR-18-6

The HR-218/20 has a heavy duty, powder coated front grille with a special acoustic rear fabric to protect the transducers against dust and dirt.

Handle HR-18-6

An ergonomic handle is located on each side of the HR-218/20 enclosure to facilitate transport, positioning and loading of the cabinets.


Components 2 x 18″, 3″ copper voice coil
Frequency Range 40 Hz – 200 Hz (-10dB)
Frequency Response 46 Hz – 200 Hz (± 3dB)
Sensitivity 105 dB (1W@1m) π
Max SPL 136 dB – 142 dB Peak
Coverage Omnidirectional
Power 2000 W (4000 W program, 8000 W peak)
Crossover Active
Nominal Impedance 4 Ω
Connectors 2 x Neutrik Speakon NL4MP
Finish Polyurea coating – other colours (RAL) available
Material 18 mm premium birch plywood
Dimensions 585 x 1080 x 624 mm (H x W x D)
Weight 68 Kg (150 lbs)