The 600 Series 3 includes a choice of three ded- icated subwoofer speakers, each one tailored to the bass power handling requirements of different home cinema applications.
The cabinet is the bedrock and ours employ extensive internal bracing to minimise panel vibration. Joints are double-sealed to prevent air leakage. The drive units use cones of thick fibre pulp reinforced with Kevlar fibres and heavily impregnated with resins to be ultra- stiff. Overlarge dust caps further strengthen the cone and minimise flexing. Dynamic performance is ensured by generous magnet assemblies and large-diameter voice coils that comfortably handle the power of the dedicated, custom-matched amplifiers. All three subwoofers incorporate special Bass Overload Suppression System circuitry to avoid the irritating distortion that can occur if either the driver or amplifier approaches its limits.
point at which cabinets simply become too bulky and obtrusive for domestic settings.
The ASW675 packs the punch of a larger subwoofer from a compact cabinet. A sub- woofer for the largest domestic installations, the ASW675 is visually very much part of the 600 Series family. But behind the familiar moulded baffle are an amplifier and drive unit that are all its own.
What it loses in volume it makes up for by other means: a higher power amplifier than normal with enough output capacity to produce the necessary low-frequency equalisa- tion needed to overcome the restrictions of the compact cabinet, and a drive unit with extra long throw, capable of moving the required volumes of air with low distortion.
A large magnet ensures high efficiency and control of the massive voice coil which, with its high thermal mass, runs cool even with
The drive unit’s cone, dust cap and carbon fibre coil bobbin are bonded together in our unique second-generation ‘mushroom’ construction, giving 3-ring girder (1) rigidity. Predicted by Finite Element Analysis and verified by laser measurement, this construction helps to produce the ‘slam’ and speed of impulsive bass.
Distortion is lowered by the T-shape centre pole (2), which improves field symmetry, and an aluminium ring (3), which reduces
flux modulation. A triple suspension system (4) handles the high shear forces generated and keeps the coil perfectly aligned throughout its 50mm maximum throw.
Despite its high 500 watts output, the amplifier in the ASW675 is relatively compact and runs reliably cool, thanks to optimisation using thermal modelling software and
two highly energy-efficient features: Class D operation and a switch mode power supply eliminates mains interference with the rest of your equipment.
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Technical features | Paper/Kevlar® cone drive unit | Paper/Kevlar® cone drive unit | Composite aluminium/paper/Kevlar® |
| 150W Amplifier | | 150W Amplifier | | cone drive unit | |
| | | | | 500W Amplifier | |
Description | Active closed-box subwoofer system | Active closed-box subwoofer system | Active closed-box subwoofer system |
Drive units | ø250mm (10 in) paper/Kevlar® cone | ø300mm (12 in) paper/Kevlar® cone | ø250mm (10 in) composite |
| | | | | aluminium/paper/Kevlar® cone long-throw |
Frequency range | -6dB at 22Hz and 180Hz adjustable (EQ at A) | -6dB at 20Hz and 180Hz adjustable (EQ at A) | -6dB at 17Hz and 40/140Hz adjustable (EQ at A) |
Frequency response | -3dB 26Hz–150Hz adjustable (EQ at A) | -3dB 25Hz–150Hz adjustable (EQ at A) | -3dB 22Hz–31/110Hz adjustable (EQ at A) |
Amplifier | Power output: | 150W continuous | Power output: | 200W continuous | Power output: | 500W continuous |
| Input impedance: | 22kΩ | Input impedance: | 22kΩ | Input impedance: | 33kΩ |
| Signal / noise: | >90dB | Signal / noise: | >90dB | Signal / noise: | >90dB |
| Functions: | Output level | Functions: | Output level | Functions: | Output level |
| | Low-pass filter frequency | | Low-pass filter frequency | | Low-pass filter frequency |
| | Low-pass filter bypass | | Low-pass filter bypass | | Low-pass filter bypass |
| | Bass roll-off alignment | | Bass roll-off alignment | | Bass roll-off alignment |
| | Auto sense on/standby | | Auto sense on/standby | | Auto sense on/standby |
| | Phase switch | | Phase switch | | Phase switch |
| Inputs: | Line In (RCA Phono) | Inputs: | Line In (RCA Phono) | Inputs: | Line In (RCA Phono) |
| | Speaker level (binding | | Speaker level (binding | Outputs: | Line Out (RCA Phono, |
| | posts) | | posts) | | high-passed) |
| Outputs: | Line Out (RCA Phono, | Outputs: | Line Out (RCA Phono, | | Link Out (RCA Phono) |
| | high-passed) | | high-passed) | | |
| | Link Out (RCA Phono, | | Link Out (RCA Phono, | | |
| | parallel to Line In) | | parallel to Line In) | | |
Ideally suited to small to medium-sized installations using the DM601 S3, DM602 S3 or DM602.5 S3 in the main speaker positions, the ASW600 is large enough to deliver rich, deep bass but, being a closed-box system, does so only from its front face, which allows plenty of flexibility in positioning.
The ASW650 goes louder and lower. Equipped with a 200W amplifier and a 50-litre cabinet, it supplements set-ups that include the DM602.5 S3, DM603 S3 or the DM604 S3 as main speakers. Movies in particular can be very demanding of subwoofers and some special effects can test them to the limit.
Conventional subwoofer wisdom says, the bigger the sound, the bigger the box. But as one climbs the output scale, there comes a
the extra bass boost. And don’t even worry about exceptional signals: the epoxy adhesives of this 76mm diameter voice coil can withstand temperatures of over 300C.
For the ASW675, Kevlar® fibres and resin impregnation add strength and stiffness to the pulp cone, which has an additional layer of aluminium bonded to the front surface. This composite construction further increases resistance to deformation under the high surface pressures generated within the cabinet. The open design of the driver’s die-cast aluminium chassis and the thorough venting of the various cavities behind the diaphragm reduce both viscous drag and turbulence noise.
| Speaker level out | Speaker level out | |
| (high-passed) | (high-passed) | |
Low-pass filter | Active 2nd-order, variable cut-off frequency | Active 2nd-order, variable cut-off frequency | Active 2nd-order, variable cut-off frequency |
High-pass filter | Line level: Active 3rd-order at 80Hz | Line level: Active 3rd-order at 80Hz | Line level: Active 3rd-order at 80Hz |
| Speaker level: Passive 1st-order at 80Hz | Speaker level: Passive 1st-order at 80Hz | |
| (into 8Ω load) | (into 8Ω load) | |
Dimensions | Height: 365mm (14.4 in) not including spike feet | Height: 417mm (16.4 in) not including spike feet | Height: 340mm (13.4 in) not including spike feet |
| Width: 365mm (14.4 in) | Width: 415mm (16.3 in) | Width: 340mm (13.4 in) |
| Depth: 450mm (17.7 in) including grille | Depth: 495mm (19.5 in) including grille | Depth: 411mm (16.2 in) including grille |
| and controls | and controls | and controls |
Net weight | 19.5kg (43 lb) | 25.5kg (56 lb) | 25.5kg (56 lb) |
Cabinet finish | Black Ash or Light Oak Sorrento Vinyl | Black Ash or Light Oak Sorrento Vinyl | Black Ash or Light Oak Sorrento Vinyl |
Grille | Black cloth | Black cloth | Black cloth |
