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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.) |
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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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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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| 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. |
Length No
Accessories Mic, mic stand, remote control
Amplifier 360 watts Dynamic/180 watts RMS Power
Auto On/Off Yes
Cabinet Design Extended Excursion Down-firing port
Color Black Ash Wood Grain
Dimensions: (H/W/D) 14.5" x 13.25" x 14.875" (36.8 x 33.7 x 37.8 cm)
HiPass Crossover 80 Hz*, 6 dB/octave
LoPass Crossover 40-120 Hz adjustable (12 dB octave, 24 dB ultimate)
Phase Control 0, 90, 180, 270 Degrees
Removable Grille Yes
Shipping Weight 31 lbs. (14 kg)
Size No
Voice Coil 2-Layer copper
Warranty (N. Am.) Two years (electronics & drivers - parts & labor)
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With the Impact-Mini you get amazing bass in a tiny cabinet that is almost the same size as the MiniVee-8, but at a very budget-friendly price. This engineering marvel is lightweight with an aluminum cone, furniture-quality cabinet finish and concentrates its 300 watts of output power in the 38 Hz to 140 Hz range. This is Velodyne's lightest weight subwoofer and includes an adjustable low pass crossover frequency so you can easily match the Impact-Mini to your satellite speakers.
Features
Compact, stylish cabinet; high-value subwoofer
6.5" active and 8" passive andonized aluminum woofers
High quality, long throw drivers
2" copper-wound voice coil for exceptional reliability
Down-firing bass radiator for more output, less distortion
"Green” MDP amp rated at 300 watts Dynamic power
User's Manual Specifications
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