Subwoofers — Definitive Technology Descend DN15

The Descend DN15 is an active subwoofer made by Definitive Technology, one of the four Descend models introduced on 13 July 2021. It shares its electronics platform with the DN12, adding more cone area and a larger cabinet. It was listed at USD 1,999 and comes in Midnight Black, with a Glacier White version also offered.

Key specs that matter

The active 15 inch woofer is backed by two 15 inch passive radiators, which Definitive Technology describes as an XBR configuration of its 3XR design. The Class H amplifier, built with sliding supply rails, delivers 500 W continuous and 1,500 W peak, and a 56-bit DSP handles filtering and equalisation. Frequency response is quoted as 20 Hz to 150 Hz within 3 dB, with the low pass point adjustable from 40 Hz to 120 Hz. The cabinet measures about 63.3 x 61.3 x 59.5 cm (height, width, depth), and the packed weight is about 60 kg. Signal enters through an LFE socket or a stereo RCA line pair. It is the only Descend model to go down to 20 Hz, 5 Hz lower than the DN12.

Engineering and use context

Pressure coupling the two passive radiators to the driven woofer is what the maker calls 3XR architecture, and the brand claims it triples the surface that moves air compared with a comparable vented box. Without a port, the cabinet avoids chuffing, and Definitive Technology describes the enclosure as non-resonant. Intelligent Phase Control gives stepless phase adjustment over a full 360 degrees. Three EQ modes are available, named Flat, Deep and Loud. Settings are made with a remote that has its own display, and the current values also appear on an LED panel at the front. A 12 V trigger and an IR pass-through connection let the DN15 fit into installations where the AV receiver or a control system switches the components. Warranty cover is 5 years on drivers and cabinet and 3 years on amplification and electronics.

Pairing

The LFE input is intended for an AV receiver or processor, and the stereo RCA inputs suit a stereo preamplifier with a subwoofer or line output. Given the cabinet size and weight, the DN15 needs a fixed floor position planned in advance, and in a 20 m2 home cinema a single unit can serve a full surround layout of towers or bookshelf speakers.

Alternatives

The Descend DN12 is the smaller Class H model of the series, using a 12 inch woofer with two 12 inch passive radiators and a quoted limit of 25 Hz.