Turbosound iQ18B Aktiv subwoofer

Turbosound iQ18B — 3,000W Active Subwoofer with Klark Teknik DSP

This model is a front-loaded 18" powered subwoofer built to anchor portable PA rigs and fixed installations. A 3,000W peak Klark Teknik Class D amplifier drives a high-excursion 18" driver with double suspension, delivering 132 dB SPL from a bandpass birch plywood enclosure. At 39.8 kg with back-mounted 75 mm castors, it stays one-person portable despite the output numbers.

Klark Teknik DSP, Speaker Modelling, and Ultranet Networking

What separates the iQ18B from generic powered subs is Klark Teknik DSP with speaker modelling and Ultranet digital audio networking over standard Cat 5 cable. On the rear panel you'll find an LCD with rotary encoder, a USB-B port for the PC remote app, and dual RJ45 Ultranet links that connect directly to compatible digital mixers. Combo XLR/Jack inputs, XLR link outputs, and chainable Neutrik powerCON connectors finish a back panel ready for touring.

Amplification and Output Power

Power and headroom define a sub's real-world usefulness.

• Amplifier Power: 3,000 W peak Klark Teknik Class D — high output in a 39.8 kg cabinet
• Max SPL: 132 dB — headroom for mid-size venues and outdoor gigs
• With a frequency range of 40 Hz – 130 Hz, this sub focuses the low-end energy where it is most musically useful.

Driver and Enclosure

The acoustic core is a high-excursion 18" driver with a 4" voice coil and double suspension.

• LF Driver: 18" high-excursion with double suspension — tight, articulate low end
• Enclosure: Birch plywood, bandpass — durable, road-ready, acoustically rigid
• The grille is powder-coated perforated steel, providing robust driver protection against impact and transport damage.

Connectivity, DSP, and Control

Modern PA work demands digital integration without extra outboard gear.

• Inputs: Combo (XLR/Jack), USB-B, Ethernet (Ultranet RJ45) — analogue and digital paths in one box
• Outputs: 2x XLR link outputs — daisy-chaining to tops or additional subs
• DSP: Klark Teknik with speaker modelling — EQ, crossover, and voicings via LCD or PC
• Neutrik powerCON in/out delivers locking mains power with link-out for chained cabinets.