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10K Used Gear supplies used audio equipment including consoles, amplifiers, speakers and system components with live listings and enquiry options.

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Professional sound equipment is built for long service life. As used stock, cosmetic condition may vary and pricing reflects that.

Do you provide warranty on used audio equipment?

Yes. Eligible products include a 21-day warranty covering major malfunctions. It should be expressly noted that warranty does not apply to auction items.

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Used d & b Audiotechnik C4 Series for Sale

Used d & b Audiotechnik C4 series is a professional loudspeaker system comprising the C4-TOP coaxial horn-loaded mid/high frequency cabinet and the C4-SUB double bandpass subwoofer, engineered for high-SPL, long-distance sound reproduction. Available second-hand through sellers worldwide, scroll down to browse current used C4 series listings.

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d & b Audiotechnik C4 series specifications

Brand	d and b Audiotechnik
Segment	Audio

About the d & b Audiotechnik C4 series

The d & b Audiotechnik C4 series pairs two complementary cabinets. The C4-TOP is a 2-way coaxial horn-loaded loudspeaker featuring a 12-inch driver and 2-inch compression driver, with narrow dispersion characteristics of 35° x 35° above 700 Hz for clear, intelligible sound over long distances at very high SPLs. This focused dispersion is particularly suited to acoustically critical environments. The C4-SUB is an 18-inch double bandpass subwoofer designed to match the C4-TOP, extending system frequency response down to 50 Hz, with cabinet dimensions and flying arrangements compatible with both the C4-TOP and the C3. Both cabinets are constructed from marine plywood with an impact-resistant paint finish.

d & b Audiotechnik C4 series — buyer FAQs

What is the d & b Audiotechnik C4 series and what are its two main components?

The d & b Audiotechnik C4 series is a professional loudspeaker system built around two complementary cabinets: the C4-TOP, a 2-way coaxial horn-loaded mid/high frequency loudspeaker with a 12-inch driver and 2-inch compression driver, and the C4-SUB, an 18-inch double bandpass subwoofer. Together they form a full-range system covering down to 50 Hz, intended for high-SPL, long-distance sound reproduction.

What makes the C4-TOP suited to acoustically difficult venues?

The C4-TOP has narrow dispersion characteristics of 35 degrees by 35 degrees above 700 Hz, which focuses sound into a tight beam rather than spreading it into reflective surfaces. This allows clear and intelligible reproduction over long distances at very high SPLs, making it particularly useful in environments where room acoustics would otherwise blur or colour the sound.

How does the C4-SUB extend the system and what other cabinets is it compatible with?

The C4-SUB is a bandpass subwoofer specifically designed to pair with the C4-TOP, extending frequency response down to 50 Hz. Its cabinet shape, dimensions and flying arrangements are fully compatible with both the C4-TOP and the C3, which allows mixed configurations and stacking or flying alongside those cabinets without additional hardware complications.

Who makes the C4 series and where does it sit in the d & b Audiotechnik range?

The C4 series is made by d & b Audiotechnik, a German professional audio manufacturer founded in 1981 and based in Backnang, Germany, producing loudspeakers, subwoofers, amplifiers and system control software for the rental, touring and installation markets. The C4 series sits within the company's range of high-SPL, long-throw loudspeaker systems, and shares cabinet compatibility with the C3.

What should I check when buying a used C4 series system?

Check whether a listing covers the C4-TOP, the C4-SUB or both, as the series is sometimes sold as individual cabinets. Inspect the marine plywood construction for damage, confirm the impact-resistant paint finish and steel handles are intact, and verify that rigging stud plates and hinge plates are undamaged if flying is intended. Used listings on this page carry a 21-day warranty covering major functional faults; full detail is in the buying guide at 10kused.com/used-av-equipment-guide/.

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d & b Audiotechnik C4 series specifications

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