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KEF R400b Subwoofer
At just 14 inches square, the KEF R400b may be compact, yet it packs an incredible punch. With a reinforced and braced sealed cabinet, the R400b houses twin 9-inch LF drivers powered by twin 250W class-D amplifiers. The drivers are mounted back-to-back, to create ʽforce cancellingʼ. This means the opposing reactive forces are nullified, resulting in no cabinet agitation and a clean, fast, powerful bass performance – perfect for any serious home theatre system.
| Model | R400b | Design | Powered Subwoofer (Sealed)
| Drive Units | Bass units:
LF: 2 x 225mm (9in.) | Frequency range (-6dB) | 26Hz - 140Hz | Maximum output | 111dB | Amplifier | 2 x 250W (500W)
built-in Class-D
| Low pass filter Variable | 40Hz - 140Hz, 4th-order | Low level signal inputs | RCA phono sockets
Speaker level inputs | Internal volume | 22 litres | Power requirements | 100V - 120V / 220V - 240V
~ 50 / 60Hz | Power consumption | 600VA | Weight | 21.5kg (47.4lbs.) | Dimension (H x W x D)
(with terminal & plinth) | 365 x 330 x 351 mm
(14.4 x 13 x 13.8 in.) |
| For big sound in smaller spaces, you canʼt beat the ASW608, the most compact of the 600 Series subwoofers.
Its long-throw 200mm driver allows the ASW608 to move the large volumes of air needed for high-quality low-frequency output, and its audiophile-standard 200W Class D amplifier keeps the unit running cool, even when the music or movie action is whipping up a storm.
In all of the 600 Series subwoofers, the bass driver diaphragms are constructed from a rugged, finely-tuned mix of paper pulp, Kevlar® fibres and resin, which provides the stiffness needed to withstand the tremendous physical forces exerted by the voice coil and pressures inside the cabinet.
Ultra-solid construction delivers slamm
Description |
Active closed-box subwoofer system |
Drive unit |
ø200mm (8 in) paper/Kevlar® cone long-throw |
Frequency range |
-6dB at 23Hz and 25/140Hz adjustable (EQ at A) |
Frequency response |
±3dB 32Hz – 40/140Hz adjustable (EQ at A) |
Bass Extension |
-6dB at 23Hz (position A) |
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-6dB at 28Hz (position B) |
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-6dB at 36Hz (position C) |
Amplifier |
Power output: 200W |
Rated power consumption: |
40W/ 0.5W standby |
Input impedance: |
33kW |
Signal / noise: |
>90dB |
Functions: |
Volume level – line in |
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Volume level – speaker in |
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Low-pass filter frequency – line in only |
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Low-pass filter bypass |
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Bass extension |
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Bass roll-off alignment |
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Auto sense on/standby |
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Phase switch |
Inputs: |
Line In (RCA Phono) |
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Speaker in (Binding post) |
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12v trigger (3.5mm jack) |
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Low-pass filter |
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Active 4th-order, variable cut-off frequency |
Dimensions |
Height: 260mm (10.2 in) not including feet |
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Width: 260mm (10.2 in) |
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Depth: 330mm (13 in) including grille and controls |
Net weight |
8.85kg (19.5 lb) |
Finishes |
Black Ash Vinyl |
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Red Cherry Vinyl |
| Hxείο Sub, high Fidelity, 300 Watts Continuous Program Power (2 hrs) 150 Watts ContinuousPink Noise (2 hrs)200 Watts Continuous Program Power (100 hrs) 100 Watts Continuous Pink Noise (100 hrs), 115dB average, 121dB peak (near corner) 109dB average, 115 dB peak (center of wall) 32 Hz ? 200 Hz +-3dΒ Eπιλογή λειτουργίας 70/100v/, 80W, 40W, 20W, (& 10W @ 70V), 8 ohm bypass/thru, με 1 woofer 200 mm (8 in) με polypropylene cone, ανάρτηση butyl rubber, με πηνίο φωνής 38 mm (1.5 in) 4-layer copper-clad, και αεριζόμενο former αλουμινίου. Διαστάσεις: 356 x 391 x 203 mm. Περιέχεται βάση στήριξης. Χρώμα Μαύρο-Λευκό. Μπορεί να λειτουργήσει με 2 ή 4 δορυφόρους ?ηχεία, και σε συνδυασμό με ηχεία οροφής της σειράς 40 της JBL. Βάρος 9kg. |
Amplifier Output: 1000 watts (RMS) 2000 watts (Peak) Frequency Response: 16Hz to 40/160Hz variable Crossover (Low Pass): 40Hz - 160Hz Variable slope characteristic from 12 - 36dB/Octave Sub-Sonic Filter (High Pass): 16Hz - 31Hz EQ: 4 x Presets 1 x User Setting Equalisation: Graphic 9 band Equaliser ±6dB in 0.5dB steps Volume Level: -80 - 0dB (1dB increments from 0 to -30dB & 2dB increments from -31 to -80dB) Auto Sensing Input Requirements: Line Level>5mV (RMS) Variable delay time 5, 10, 15, 20, 25 & 30 minutes Variable Phase Control: 0. 45. 90, 135, 180, 225, 270 & 315º Internal Memory: 3 Independent memory locations Cabinet Specification: Sealed Cabinet with 25mm thick M.D.F construction with critical internal bracing Amplifier Classification: Class-D amplifier with DSP control Driver Complement: 1 x 15" C-CAM long throw sub-woofer driver featuring triple suspension and a 4" long throw voice coil External Dimensions - Excluding Plinth: Width: 485mm (19 inches) Height: 455mm (18 inches) Depth: 475mm (18 3/4 inches) Weight: 50 Kg (110lbs) Mains input Voltage: 100 - 240 Vac 50/60Hz (Factory Set) Trigger Input: 3.5mm Jack input, +12Vdc = On State User's Manual AVAILABLE IN THESE COLOR FINISHES
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System Format: Sealed Cabinet. 25mm M.D.F construction with internal bracing. Sealed amplifier compartment Low Frequency Limit: 18 Hz Upper Frequency Limit: 40 - 120 Hz Variable Low Pass Filter Alignment: Active 4th order 24dB/octave (6/12/18/24 dB user adjustable) Amplifier Power Output 650 watts Continuous. 1200 watts (peak) Amplifier Classification D2AudioTM* DSP controlled, Class-D amplifier system. High current switch mode power supply (smpsu) Equalisation 4 Settings (Off/Music/Movie/Impact) Phase Control 0-90-180-270 degrees Auto Sensing Input Level Requirements Line Level > 2mV. Standby after 10 minutes if no signal sensed Digital Volume Level -60 to +10dB in 1dB increments Drive Unit Complement 1 x 15” C-CAM® sub-woofer driver featuring triple suspension 3” long throw voice coil 12V Trigger Input 3.5mm mono jack socket Connections Stereo RCA in/out LFE in/out 12V Trigger in (3.5mm mono jack) LEO* - 3.5mm Microphone input jack (microphone supplied) Input Impedance 20 kohms Dimensions (H x W x D) 430 x 400 x 400 mm (16 15/16 x 15 3/4 x 15 3/4 Inches) Grille Depth 28 mm (1 1/8 Inches) Weight (unpacked) 35.3 kg (77.6 lbs) Mains Input Voltage 100 - 120 Vac / 220 - 240 Vac 50/60 Hz (Factory preset) Electrical Certifications CE/CB/ETL/Fcc/ErP (Energy saving compliant) Power Consumption Maximum 1000W. Standby Fuse Type 20mm UL/VDE (Value is region specific) IR Remote Control Code NEC SH6122 AVAILABLE IN SIX COLOR FINISHES
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Description Active balanced-drive closed-box subwoofer system
Drive units 2x Ø300mm (12 in) Rohacell® cone long-throw
Frequency range -6dB at 15Hz and 250Hz
Frequency response ±3dB 17Hz - 145Hz
Power output: 1000W
Rated power consumption: 135W
Standby power Consumption: 100dB
Functions: 5 Presets
Input sensitivity
Gain
Low-pass filter
Graphic equalisation
Room compensation
Auto on/standby
Trigger on/standby
Trigger preset switching
RS-232 automation control
Inputs: Stereo Line In (2x RCA Phono)
Mono (LFE) Line In (RCA Phono)
Mono (LFE) Line In (XLR balanced)
Dimensions Height:490mm (19.3 in) not including feet
Width: 460mm (18.1 in) including grilles
Depth: 410mm (16.2 in) including controls
Net weight 44kg (97 lb)
Cabinet finish Gloss Black
Cherrywood
Rosenut
Grille Black cloth
ALSO AVAILABLE IN Cherrywood, rosenut
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