Reflex Loaded Subwoofer


High power compact reflex subwoofer

Incredible power density
Exceptional frequency and impulse response ensure fast, accurate low frequencies
2 x 15″ neodymium LF drive units
The S-215 is a compact high power subwoofer, intended to support any product within the EM Acoustics range but is an ideal companion to the HALO-B medium format line array.
  • Mechanically and acoustically compatible with HALO-B for ground stack
  • Impact and weather resistant black, and textured white finishes as standard
  • RAL colour and weather protection option
  • Protective floor runners and matching stacking recesses
  • Tour-grade castors included
  • Protective cover accessories available

The S-215 is a compact high power subwoofer, and whilst derived from the flyable ST-215 it is a standalone product in its own right and can be used to support any EM Acoustics product in a ground stack configuration.

The compact enclosure houses a pair of 4” voice coil, 15” (381mm) neodymium drive units, in an optimally-tuned reflex design with a single low-velocity port to minimise distortion generated by turbulence. The drive units’ high motor strength gives the S-215 excellent transient response, and the moving area of the two high-excursion 15” drive units generate significant low frequency extension and overall subwoofer output. The enclosure is symmetrical, so in ground stacked configurations one enclosure in every three can be rotated to point physically backwards to create a cardioid array. Such arrays offer exceptional low frequency directivity control and significantly reduce the energy radiating to the rear of the subwoofers.

The robust enclosure is constructed from premium 18mm (¾”) multi-laminate Birch plywood – rebated, screwed and glued together for maximum strength. The enclosure is finished in our 3-step polyurethane coating, which as well as being far tougher than conventional water-based paints used on other products offers the S-215 a significant level of weather resistance without any further treatment.

The mechanical package is completed by a mesh-backed steel grille, eight recessed bar handles (four per side), protective stacking runners and mating recesses for use in both portrait and landscape orientations, and two M20 threaded pole adapters. The S-215 is supplied with castors for the rear as standard.  Three M8 threaded fittings are provided on the top of the enclosure for attachment of the GS-HALO-B ground stack frame, and assembly of HALO-B ground stack systems.  Inputs are provided on a pair of Neutrik speakON NL4 connectors for input and enclosure link.

The S-215 requires a single amplifier channel and an active crossover to function correctly – as such it is recommended to be used with the DQ10 or DQ20 advanced system amplifiers. Using these amplifiers a maximum of eight S-215 subwoofers could be driven from a single DQ20 amplifier. For cardioid arrays, separate amplifier channels are required for the rear-firing subwoofer(s) due to the different processing needed.

Enclosure Type High power reflex loaded subwoofer
Components 2 x 15″ (381mm) high excursion neodymium LF drive units
Dimensions (HxWxD), mm/(ins)  550 (21.7) x 772 (30.4) x 752 (29.6)
Net/Shipping Weight 62/66kg (136/141lbs)
Frequency Response 40Hz – 150Hz ± 3dB
Maximum SPL 133dB continuous, 139dB peak
Loudspeakers per amplifier DQ6*: 1 per channel, DQ10*: 1 per channel, DQ20: 2 per channel
Power Handling 2000W RMS, 4000W program
Nominal Impedance 4 ohms

* Whilst the DQ6 and DQ10 will operate the S-215, they will not allow the subwoofer to reach its full potential and as such should only be used in low SPL environments.







Case Studies using this Product

Case Studies using this Product