Bowers and wilkins dm 305

But at least outwardly the system hasn't undergone any significant changes. The rear panel made of acoustically viscous plastic is molded in such way that wedge-shaped structure is formed inside, which increases the efficiency of energy absorption of spurious standing waves.

Rachel Cramond Thursday, October 25, They call this new form of construction the Prism system and it comprises a plastic moulded back panel having many of pyramid-shaped spikes projecting into the cabinet expressly to break up, and hence reduce the undesirable coloration from internal standing waves. However, it should still be seen as a non-luxury loudspeaker in comparison with most systems of similar dimensions. It does not simply have a strong family resemblance to the earlier model, it looks uncannily as if the designers have taken a DM and stuck it on top of a box with a moulded fascia whose angled edges carry the DM's profile down to floor level. Of course there is more to the new model than this. Although the 26mm tweeter is the same wide ranging soft-dome unit as in the DM, the woofer is entirely new. It is larger, at mm, and has a resin-impregnated homogeneous fibre paper coil with internal damping and a stiffened neck for improved stability.

Bowers and wilkins dm 305

The new DM is a relatively small and affordable two-way tower speaker whose performance belies its size, weight, and cost. The center of the woofer cone has a rigid conical dome, and both drivers are normally concealed by a removable plastic-framed grille. In addition to a conventional circular bass duct whose vent is on the rear of the cabinet, there is also a narrow ducted vent across the front of the cabinet below the woofer. The rear of the cabinet presents an unusual appearance. It resembles an egg-crate, with more than fifty square openings. At the center are the input connectors. The input connectors are two sets of recessed binding posts, normally paralleled by removable metal jumpers. They allow the system to be biwired or biamplified, and apparently they are designed for use only with stripped wire ends, which must be passed through holes in the posts and then screwed down; dual banana plugs cannot be used, and even single plugs are extremely awkward to install because of the limited visibility and finger access to the connections. Because the DM is a floor-standing system, it is not magnetically shielded. Our measurement of the external magnetic-field strength at 4 inches from the front panel of the speaker showed a safe flux level of less than 2 gauss, indicating that the DMs could be placed fairly close to a TV if necessary.

The price is about right but its baby brother, the DM now looks like even better value for money at less than half the price.

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Rachel Cramond Thursday, October 25, They call this new form of construction the Prism system and it comprises a plastic moulded back panel having many of pyramid-shaped spikes projecting into the cabinet expressly to break up, and hence reduce the undesirable coloration from internal standing waves. However, it should still be seen as a non-luxury loudspeaker in comparison with most systems of similar dimensions. It does not simply have a strong family resemblance to the earlier model, it looks uncannily as if the designers have taken a DM and stuck it on top of a box with a moulded fascia whose angled edges carry the DM's profile down to floor level. Of course there is more to the new model than this. Although the 26mm tweeter is the same wide ranging soft-dome unit as in the DM, the woofer is entirely new. It is larger, at mm, and has a resin-impregnated homogeneous fibre paper coil with internal damping and a stiffened neck for improved stability. A novel feature, which enables the cone to emulate the smooth response of Kevlar cones, is a series of V-section embossed ribs described as 'wave spoilers'. These run out tangentially from the central former region almost to the cone edge and have the effect of inhibiting standing waves due to transmitted and reflected energy within the cone, including bell-mode or 'lampshade' resonance modes.

Bowers and wilkins dm 305

The new DM is a relatively small and affordable two-way tower speaker whose performance belies its size, weight, and cost. The center of the woofer cone has a rigid conical dome, and both drivers are normally concealed by a removable plastic-framed grille. In addition to a conventional circular bass duct whose vent is on the rear of the cabinet, there is also a narrow ducted vent across the front of the cabinet below the woofer. The rear of the cabinet presents an unusual appearance. It resembles an egg-crate, with more than fifty square openings. At the center are the input connectors. The input connectors are two sets of recessed binding posts, normally paralleled by removable metal jumpers. They allow the system to be biwired or biamplified, and apparently they are designed for use only with stripped wire ends, which must be passed through holes in the posts and then screwed down; dual banana plugs cannot be used, and even single plugs are extremely awkward to install because of the limited visibility and finger access to the connections. Because the DM is a floor-standing system, it is not magnetically shielded.

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Stuffing dusters into the rear vents I'll try anything in the interests of science robbed the loudspeakers of almost all of their warmth and bass extension. There are two pairs of terminals, spikes are attached. However, it should still be seen as a non-luxury loudspeaker in comparison with most systems of similar dimensions. The response has a tendency to be saucer-shaped with some recession in the midrange and a raised plateau at high frequencies. An acoustic resistance partition leads through to the larger lower enclosure which has its own conventional cylindrical port set into the rear panel. Therefore, although the tweeter design and its mounting plate combine to give a good measure of equable dispersion over a wide frontal angle, I angled-in the loudspeakers to put myself almost exactly on-axis. However, I had already established to my satisfaction that the DM has a civilised top end, free of any serious treble edge. Follow us. There is no need to orient the speakers strictly to the listener - the stereo zone is quite wide. But at least outwardly the system hasn't undergone any significant changes. The chassis is a high-rigidity casting. The new DM is a relatively small and affordable two-way tower speaker whose performance belies its size, weight, and cost. A high quality of long-suffering violin sound's transmission is a very serious argument in favor of the tweeter, which supports the image in cleanness up to very high volume levels. Of course there is more to the new model than this.

But at least outwardly the system hasn't undergone any significant changes. The rear panel made of acoustically viscous plastic is molded in such way that wedge-shaped structure is formed inside, which increases the efficiency of energy absorption of spurious standing waves. Paper cone of the woofer is also profiled in a special way.

The new DM is a relatively small and affordable two-way tower speaker whose performance belies its size, weight, and cost. Of course there is more to the new model than this. Rachel Cramond Thursday, October 25, Nevertheless, there appears to be considerably more to this loudspeaker than can be inferred from its plain exterior and modest price — in fact, it must be inferred, since the manual is surprisingly reticent about technical details of its design. It resembles an egg-crate, with more than fifty square openings. Therefore, although the tweeter design and its mounting plate combine to give a good measure of equable dispersion over a wide frontal angle, I angled-in the loudspeakers to put myself almost exactly on-axis. An acoustic resistance partition leads through to the larger lower enclosure which has its own conventional cylindrical port set into the rear panel. It does not simply have a strong family resemblance to the earlier model, it looks uncannily as if the designers have taken a DM and stuck it on top of a box with a moulded fascia whose angled edges carry the DM's profile down to floor level. Fortunately, the speaker speaks for itself with an eloquence rarely associated with products in its price and size range. As this is a moderately tall loudspeaker, I was surprised at its relatively low weight. However, it should still be seen as a non-luxury loudspeaker in comparison with most systems of similar dimensions.