Omnitronic PAS-181A MK4 Subwoofer

Powerful Bass for Touring and Installations!

The Omnitronic PAS-181A MK4 delivers powerful, full bass for any event — whether it’s a concert, club night, party or DJ gig. This active 18" subwoofer with an integrated digital signal processor (DSP) combines high output with flexible tuning and a rugged, transport-friendly design. It gives you a reliable low-end foundation for both live events and permanent installations.

With its muscular 18" woofer and 4" voice coil, the PAS-181A MK4 produces deep, punchy bass. The Class-D amplifier provides 1400 W program power (nominal 700 W RMS) and up to 129 dB max SPL, so the subwoofer makes even large rooms thump and delivers bass you can both hear and feel. The frequency range spans 35 Hz to 200 Hz — ideal for reproducing deep kick basses or robust low-end sounds cleanly and with impact.

The controls are flexible and practical: the built-in DSP offers three presets (FLAT, KICK, DEEP) so you can fine-tune the bass character to the music style or event. Whether you want a flat, balanced low end (FLAT), a punchy kick (KICK) or deep-reaching subbass (DEEP), the sub adapts reliably. In addition, XLR outputs with a switchable high-pass filter (120 Hz) let you integrate top cabinets or additional speakers cleanly and configure the system optimally.

Built for heavy-duty use, the enclosure is made from multi-ply glued plywood finished in durable textured paint and fitted with a black metal grille and acoustic foam. Two sturdy carry handles and preparation for optional wheels simplify transport and setup — ideal for mobile rigs, DJ gigs or event services. Thanks to its balanced design, the subwoofer suits both touring applications and fixed installations in clubs, bars or event halls.

The PAS-181A MK4 is an excellent choice for anyone who demands powerful, clean bass along with everyday flexibility and durability. It impresses with high-performance engineering, versatile applications and professional sound quality — whether you’re DJing, performing live or installing.