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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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Crossover Tuning
Mushrooms
Description Active closed-box subwoofer system
Drive unit ø250mm (10 in) paper/Kevlar® cone long-throw
Frequency range -6dB at 18Hz and 25/140Hz adjustable (EQ at A)
Frequency response ±3dB 25Hz – 40/140Hz adjustable (EQ at A)
Bass Extension -6dB at 18Hz (position A)
-6dB at 23Hz (position B)
-6dB at 28Hz (position C)
Amplifier Power output: 500W
Rated power consumption: 98W / 1W standby
Input impedance: 33kΩ
Signal / noise: >90dB
Functions: Input level (line in)
Input level (speaker in)
Low-pass filter frequency (line in only)
Low-pass filter bypass
Bass extension
Bass roll-off alignment
Auto sense on/standby
Phase switch
Inputs: Line In (RCA Phono)
Speaker in (Binding post)
12v trigger (3.5mm jack)
Low-pass filter
Active 4th-order, variable cut-off frequency
Dimensions Height: 325mm (12.8 in) not including feet
Width: 325mm (12.8 in)
Depth: 375mm (14.8 in) including grille and controls
Net weight 15.5kg (34.4 lb)
Finishes Matte Black
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Pressure vessel enclosure
500W ICEpower® amplifier
Switch mode power supply
Description Active closed-box subwoofer system
Drive unit 2x f200mm (8 in) mica / aluminium diaphragm long-throw
Frequency range -6dB at 18Hz and 40/140Hz adjustable (EQ at i)
Frequency response ±3dB 21Hz – 31/110Hz adjustable (EQ at i)
Power output: 500W
Rated power consumption: 110W (105W - 100V version)
Input impedance: 100kΩ
Signal / noise: >90dB
Functions: Volume level
Low-pass filter frequency
Bass roll-off alignment
Auto sense on/standby
Phase switch
Inputs: Line In (RCA Phono)
Speaker Level In (FCC68 4/4)
| Amplifier Output: 500 Watts (RMS) 1000 Watts (Peak)
Low Frequency Limit 27Hz (EQ1) 21Hz (EQ2)
Upper Frequency Limit 40 - 120Hz Variable
Variable Low Pass Filter Alignment Active 4th order 24dB/octave (two-stage filter)
Cabinet Specification: Sealed Cabinet with 25mm M.D.F construction and internal bracing.
Amplifier Classification: Class-D amplifier
Driver Compliment: 1 x 12" C-CAM® sub-woofer driver featuring triple suspension and 3" long throw voice coil.
Dimensions:
(H x W x D) 340 x 340 x 410 mm
(13 3/8 x 13 3/8 x 16 1/8 inch)
Weight: (unpacked) 22.56Kg (49.63lbs)
Mains Input Voltage: 100 - 120 Vac, 220 - 240 Vac, 50/60Hz
Input Impedance 20Kohms
User's Manual
ΔΙΑΤΙΘΕΤΑΙ ΣΤΑ ΠΑΡΑΚΑΤΩ ΧΡΩΜΑΤΑ
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Technical features 500W class 'D' power amplifier
Description Active closed-box subwoofer system
Drive unit 1x f250mm (10 in) paper / Kevlar® cone long-throw
Frequency range -6dB at 18Hz and 40/140Hz adjustable (EQ at A)
Frequency response ±3dB 25Hz – 40/140Hz adjustable (EQ at A)
Power output: 500W
Rated power consumption: 94W
Input impedance: 33kΩ
Signal / noise: >80dB
Functions: Input Level (line in)
Input Level (speaker in)
Low-pass filter frequency
Low-pass filter bypass (line in only)
Bass extension
Bass roll-off alignment
Auto sense on/standby
Phase switch
Inputs: Line In (RCA Phono)
Speaker Level In (Binding post)
Low-pass filter Active 4th-order, variable cut-off frequency
Height: 325mm 12.8 in)
Width: 325mm (12.8 in)
Depth: 362mm (14.3 in)
Net weight 15.5kg (34.4 lb)
Cabinet Gloss Black
AVAILABLE IN gloss black,wenge,rozenut COLORS
| 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) |
|
-6dB at 28Hz (position B) |
|
-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 |
|
Volume level – speaker in |
|
Low-pass filter frequency – line in only |
|
Low-pass filter bypass |
|
Bass extension |
|
Bass roll-off alignment |
|
Auto sense on/standby |
|
Phase switch |
| Inputs: |
Line In (RCA Phono) |
|
Speaker in (Binding post) |
|
12v trigger (3.5mm jack) |
|
Low-pass filter |
|
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 |
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