Dynaudio 9S - Refurbished

A modern subwoofer designed to complement the LYD series and succeed the BM 9S II

The Dynaudio Pro 9S was designed as the natural partner for the brand's studio monitors, especially the LYD series, while remaining perfectly suited alongside older setups like the BM range. Visually and in terms of footprint, it retains a compact format close to the BM 9S II it replaces, but its goal is clear: to offer a more ambitious foundation and better control of low frequencies, approaching the performance level of a larger model like the BM 14S II.
Its sealed enclosure architecture favors precision and clarity over a "boom" effect. Combined with a dual front baffle and a thick front panel, this design helps reduce unwanted vibrations and maintain a clean response, useful when making reliable decisions about the low-end balance.

Who is it for and what are its studio applications?

The 9S is aimed at producers, engineers, and creators who want to secure the low end of their mixes without changing their monitors. By adding a calibrated subwoofer, your main speakers work more comfortably: they focus on the upper bass and midrange while the 9S handles the most demanding frequencies. The result: less distortion, more headroom, and a more stable image when the mix gets dense.
It integrates well in both stereo and surround setups. In small to medium-sized studios, its compactness facilitates placement, and its controls allow adaptation of the crossover to your room acoustics. The crossover filter, adjustable over a wide range, lets you target a typical crossover around 80 Hz or fine-tune according to your monitors, listening position, and room response.

Control, filtering, and connectivity: a subwoofer designed for clean integration

Deep bass that's usable in production

Thanks to its long-throw driver, the 9S goes very low while preserving useful micro-details: kick attacks, bass sustain, tom resonances, 808 sub, or managing the low end on masters intended for streaming. The specified response of 22 Hz to 175 Hz allows evaluation of what many domestic listening systems mask, and helps avoid unpleasant surprises on more generous systems (club, car, home theater).

Crossover settings and monitor relief

The variable low-pass filter (crossover) lets you set the ideal crossover frequency, typically where your monitors start to lose energy. Meanwhile, the SAT Out outputs offer a selectable (or bypassable) high-pass filter to filter satellites and prevent them from unnecessarily reproducing the low end. This approach improves overall control and clarifies the low-midrange, a critical area for accurate translation on other playback systems.

Master/slave chaining and simple alignment

The master/slave function is ideal if you want to chain multiple subwoofers (for example, to better distribute bass in the room). The 0/180 phase adjustment helps realign the subwoofer with your speakers depending on placement, to minimize nulls at the listening position. Finally, Auto ON/OFF provides everyday convenience in the studio by preventing the system from staying powered unnecessarily.

Technical specifications

System	single loudspeaker, active 9-inch subwoofer	Analog outputs	1 x XLR Slave Out, 2 x XLR SAT Out
Enclosure Principle	sealed	Auto ON/OFF	Yes
Cabinet	Black vinyl	Master/Slave Function	allows several subwoofers to be linked in chain
Front Baffle	37 mm	SAT output high-pass filter	defeatable
Woofer	230 mm MSP	AC power input	100-120 V / 200-240 V 50/60 Hz
Amplifier	300 W Class-D	Power consumption in standby mode	< 0.5 W
Frequency Response (+/-3 dB)	22 Hz - 175 Hz	Maximum power consumption	350 W
Maximum Sound Pressure Level	106 dB	Dimensions (W x H x D)	266 x 276 x 320 mm
Low-Pass Filter	50 Hz - 150 Hz	Weight	10.5 kg / 23.1 lb
High-Pass Filter	Flat / 60 Hz / 80 Hz	Shipping box dimensions (W x H x D)	400 x 430 x 400 mm
Phase Adjustment	0/180 degrees	Documentation	technical data sheet for Subwoofers part 1
Analog inputs	1 x XLR LFE, 2 x XLR Stereo