Omnitronic PAS-181 MK4 Subwoofer

Solid Deep Bass for Professional PA Systems!

The Omnitronic PAS-181 MK4 is a passive 18" bass-reflex subwoofer that delivers powerful, deep bass for clubs, events or mobile DJ setups. With 700 W RMS and a high sensitivity of 97 dB, it ensures efficient operation — ideal as a reliable bass foundation for your tops or as a compact sub in a PA system.

Performance And Sound Quality

The PAS-181 MK4 features an 18" woofer with a 4" voice coil and a ferrite magnet, reproducing low-frequency bass content cleanly and precisely. The frequency response spans 37 Hz to 200 Hz — perfectly suited to reproduce punchy kick and deep bass. With a maximum sound pressure level of up to 129 dB, the subwoofer provides ample headroom for club and live use.

Efficient And Flexible Operation

Thanks to the high sensitivity of 97 dB (1 W/1 m), the PAS-181 MK4 works efficiently with suitable amplifiers — you get loud, clean bass without excessive amplifier power. With an 8 ohm impedance it integrates flexibly into common PA setups. Its passive design gives you freedom of amplifier choice and lets you tailor modularity and system configuration yourself.

Robust & Transport-Friendly Build

The multi-ply glued plywood enclosure with black textured finish and black metal grille with acoustic foam makes the PAS-181 MK4 durable in everyday use — whether in clubs, events or mobile shows. Two recessed handles ease handling during setup and teardown; optional caster wheels can be retrofitted to simplify transport and storage. The bass-reflex design keeps the sub relatively compact and space-saving.

Whether as the sub foundation of a PA system, as a complement to tops, or as a powerful foundation for DJ or live sets — the PAS-181 MK4 impresses with its combination of powerful bass, efficient operation and rugged construction. It’s a solid choice for anyone seeking reliable low-frequency reproduction and professional performance.