Delivering ‘controlled’ bass in new walls or easy bass augmentation in retro-fit situations, Monitor Audio has introduced its new in-wall subwoofer design, an amalgam of its IWS-10 sub-woofer driver, IWA-250 amplifier and IWB-10 back box.
To provide bass depth with maximum installation flexibility, the IWS-10 subwoofer driver is a specialized design employing a rigid, flat 10-inch surface of 10mm (3/8-inch) RDT material devised for Monitor audio’s ‘Platinum’ series of high-end speakers. Rigid Diaphragm Technology is a sandwich of two layers of C-CAM alloy, bonded to a honeycomb Nomex core. The resulting properties of low mass and great strength give the driver the ability to behave as an extremely agile piston, resistant to bending, light enough to deliver an accurate bass response through large excursions, even within a shallow 81mm profile. A large vented pole helps to move air quickly, reducing power compression and improving heat dissipation.
The IWS-10 is sufficiently well specified to generate high bass quality in a range of wall, ceiling, even floor locations, ideally but not exclusively with its IWB-10 back box, providing wider retrofit possibilities. It features Monitor Audio’s patented Tri-grip clamping system which is easier to install and provides three times the surface area of a conventional dog-leg type clamp, offering better overall surface sealing. The IWS-10’s trim-less grille and frame edge are paintable to blend discreetly with décor.
When used with the IWB-10 back box, the IWS-10 return optimum ‘controlled’ performance. The IWB-10 is a sealed preconstruction back box, built from MDF and laminated with a rugged black Sandex vinyl finish. Having an internal volume of 24 litres, the IWB-10 is designed to fit between standard 14-inch stud spacing and comes supplied with adjustable steel fixing brackets. While providing the ideal environment for the driver, the IWB-10 will also reduce the radiation of sound to adjacent rooms. For easier installation, the IWB-10 is pre-wired with external terminals.
Completing the trinity is the IWA-250 switch mode amplifier – a slim, powerful dedicated design in a heavy-duty 1U rack mount case. Delivering up to 250watts into 4 ohms, a single IWA-250 will power single or dual IWS-10s to provide higher power levels for larger rooms or to meet customer demands. The IWA-250 can be configured to switch on automatically using input signal sensing, or by using the preferred 12v trigger link from and AVR or system source. The IWA-250 will then automatically be switched on and off with the AVR, TV or system remote control handset.
The amplifier utilises a cool running Class D power stage driven by a PWM with integrated DSP. All filtering and functionality are controlled in the software for precise and reliable operation. It offers a choice of single LFE, balanced XLR and stereo RCA inputs. Output connection is made via two sets of push type terminals to provide connection to one or a pair of IWS-10 drivers. The front panel provides access to all control features for easy adjustment when fitted into a rack bay. An EQ switch provides a selection of music, movie and impact presets for the ideal response in-room. There is also an enclosure switch to calibrate the drive characteristics when the IWS-10 is used within or without the IWB-10 back box.