Grand Class Speaker System SB-G90
Unwanted vibration of the speaker units and enclosure has been thoroughly eliminated. The floor-standing speaker achieves clarity in sound imaging and fullness in spatial expression.
Features
Point Sound Source Speaker System
Phase Precision Driver
(Coaxial 2-way Speaker Unit)
As with the tweeter, the mid-range also uses an anodized, lightweight, high-rigidity aluminium cone diaphragm. The magnetic circuit achieves low distortion and enhanced drive power by using large magnets, copper caps, and high-linearity-drive underhung voice coils. Also, the support structure provided by the tough die-cast frame has resonance-dispersing arms, thereby thoroughly eliminating even the slightest unnecessary resonant sound. These features enable mid-range reproduction with excellent precision and response.
In addition, the mid-range diaphragm uses a cone shape in which its sound generation centre in the axial direction is closer to the sound generation centre of the tweeter, and the position of the axial direction of the dome tweeter placed in the centre of the mid-range diaphragm is precisely adjusted, thus achieving linear phase reproduction by integrating the sound in each range without time lag. Also, the inside end of the mid-range diaphragm has a smooth shape so there is no deterioration of tweeter sound characteristics, with the diaphragm being constructed to deliver the sound emitted from the tweeter directly to the listening space. This reproduces mid-range and highs with superb precision and response, as well as excellent clarity in sound imaging.
BDMA (Balanced Driver Mounting Architecture)
With Balanced Driver Mounting Architecture, the speaker unit is mounted to a sub-baffle installed inside the cabinet at the speaker unit's centre of gravity, suppressing vibration of the speaker unit. Also, because the speaker unit is not mounted to the baffle on the front, transmission of unwanted vibration from the speaker unit to the baffle is suppressed. This makes it possible to reduce distortion in the sound waves generated from the diaphragm and reduce unwanted vibration sound from the baffle, for reproduction of a sound field with excellent sound imaging featuring impressive realism and clarity, allowing visualization of the fine details of each and every sound.
16cm Low-distortion Long-stroke Woofer
These features reproduce robust, powerful bass.
High-quality Network Circuit
In order to prevent sound vibration emitted into the cabinet by the speaker units from affecting the network, the network is installed in its own compartment separated from the speaker units, thereby achieving reproduction of sound providing an atmospheric feel.
High-rigidity Cabinet
Cabinet strength is ensured inside the cabinet by using a cross construction with sub-baffles to which the speaker units are mounted and horizontal reinforcing panels. A separate sub-baffle is used for each speaker unit, which minimises sympathetic vibration between speaker units. In addition, differentiated use of two kinds of absorbent acoustic materials with optimal placement inside the cabinet suppresses internal standing waves and reduces incidental sound due to reflection in the cabinet.
Also, multiple polyurethane (PU) coatings on the cabinet surface dampen cabinet vibration, thereby thoroughly suppressing the production of unnecessary sound. These features reproduce a vast sound field with excellent sound imaging.
Specs
Point Sound Source Speaker System
Phase Precision Driver (Coaxial 2-way Speaker Unit)
Balanced Driver Mounting Architecture (BDMA)
16-cm Low Distortion Long Stroke Woofer
High-quality Network Circuit
High-rigidity Cabinet
Size and Weight
- Height 1114mm - Width 302mm - Depth 375mm - Weight 32kg
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Emotive Acoustic Technology
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Point Sound Source Speaker System
Wide Range & Low Distortion Reproduction
Phase Precision Driver (Coaxial 2-way Speaker Unit)
16-cm Low Distortion Long Stroke Woofer
High-quality Network Circuit
Balanced Driver Mounting Architecture (BDMA)
High-rigidity Cabinet
Technics Definitive Design
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Black High Gloss Finish
Magnet Fixed Fabric Grille
Type
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3-way 4-speaker Bass Reflex (including 2-way coaxial cone units for mid-range and tweeter)
Speaker Units
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Woofer: 16 cm (6½") Cone type x 2
Midrange / Tweeter: Coaxial, 16 cm (6½")
Cone type x 1 and 2.5 cm (1") Dome type x 1
Crossover Frequencies
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480 Hz, 3.2 kHz
Frequency Range
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27 Hz - 100 kHz (-16 dB), 32 Hz - 85 kHz (-10 dB)
Sound Pressure Level
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88 dB /2.83 V (m)
Impedance
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4 Ω
Input Power (IEC)
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100 W (Rated), 200 W (Max)
Recommended Amp Power
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40 - 200 W (Speaker tested by IEC60268-5 Short Term Max Test)
Dimensions (W x H x D)
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302 x 1114 x 375 mm (including fabric grille, terminals and spikes)
(11 7/8 x 43 27/32 x 14 3/4 in.)
Weight (per unit)
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Approx. 32 kg
(Approx. 71 lbs)
Accessories
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Spike x 4, Spike shoe x 4, Spacer x 4, Base plate x 4, Base plate screw x 12, Rubber foot x 4, Operating Instructions x 1, Speaker net x 1, Cleaning cloth x 1
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