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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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Dimensions | Metric :12” W x 12” D x 12-1/2” H | 30.5 x 30.5 x 31.8 cm
Driver Complement :One high-definition 8" long throw woofer, pressure coupled to two 8” low bass radiators
Frequency Response :14 Hz – 200 Hz
Internal Amplifier Power :1250 watts
Auto On / Off :Signal Sensing (US) | Signal Sensing and Switched (International)
Power Requirements :110 volts Alternating Current (US) | 220 volts Alternating Current (International)
High Level Inputs :Two pairs of 5 way binding posts
High Level Outputs :Two pairs of 5 way binding posts
Subwoofer Inputs :One LFE input (for SW preout only)
Low Level Inputs :Two low level inputs: left and right low level in
Low Level Outputs :Two low level outputs: left and right low level out
High Level High Pass Crossover :Non Variable 6 dB/octave @ 80 Hz: Available only with high level inputs and outputs only
Low Level High Pass Crossover :12 dB/octave continuously variable from 40 Hz to 150 Hz. Available only with low level inputs and outputs
Low Pass Crossover% :24 dB/octave, continuously variable from 40 Hz – 150 Hz: Available only with high level inputs and outputs or low level inputs and outputs
Available Finishes :Piano-Gloss Black
Accessories :Rubber feet; Isolation spikes
Fuse :8 amp 250 volt Slo Blo (US) | 4 amp 250 volt Slo Blo (International)
Weight | Metric :42 lbs | 19.0 kg
Warranty :5 Years; 3 Years for Amplifiers |
Dimensions | Metric :16-3/4” W x 16-3/4” D x 16-15/16” H | 42.5 x 42.5 x 43.0 cm
Driver Complement :One high-definition 14" long throw woofer, pressure coupled to two 14” low bass radiators
Frequency Response :11 Hz – 200 Hz
Internal Amplifier Power :1800 watts
Auto On / Off :Signal Sensing (US) | Signal Sensing and Switched (International)
Power Requirements :110 volts Alternating Current (US) | 220 volts Alternating Current (International)
High Level Inputs :Two pairs of 5 way binding posts
High Level Outputs :Two pairs of 5 way binding posts
Subwoofer Inputs :One LFE input (for SW preout only)
Low Level Inputs :Two low level inputs: left and right low level in
Low Level Outputs :Two low level outputs: left and right low level out
High Level High Pass Crossover :Non Variable 6 dB/octave @ 80 Hz: Available only with high level inputs and outputs only
Low Level High Pass Crossover :12 dB/octave continuously variable from 40 Hz to 150 Hz: Available only with low level inputs and outputs
Low Pass Crossover% :24 dB/octave continuously variable from 40 Hz – 150 Hz: Available only with high level inputs and outputs or low level inputs and outputs
Available Finishes :Piano-Gloss Black
Accessories :Rubber feet; Isolation spikes
Fuse :8 amp 250 volt Slo Blo (US) | 4 amp 250 volt Slo Blo (International)
Weight | Metric :97 lbs | 44.0 kg
Warranty :5 Years; 3 Years for Amplifiers
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Outer Flange Dimensions | (Metric) :15-1/2” W x 21” H | 39.4 x 53.3 cm
Cut Out Dimensions | (Metric) :14-3/8” W x 19-7/8” H | 36.5 x.50.5 cm
Depth from Flange | Metric :3-13/16” | 9.7 cm
Driver Complement :One 10" Long-Excursion Woofer coupled to one 10" infrasonic Radiator
Frequency Response :16 Hz – 200 Hz
Impedance :4 ohms
Required Amplifier :SubAmp 600 (available separately)
Inputs :One pair of gold plated spring loaded posts
Enclosure :Sealed Medite
Available Finishes :Paintable White
Accessories :Paint mask; Cut-out template; Paintable removable all metal grill
Packaging :One to a carton
Weight | (Metric) :30 lbs | 13.6 kg
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Super-compact size
8" custom downfiring woofer
Wireless-ready!
Solid hand-finished, front-ported cabinet
Auto-sleep power saving mode
Dual line-level inputs (RCA and mini-jack)
All cables included
Excellent performance for music, movies,
and videogames
A perfect bass extension for Audioengine
powered speakers or any audio system!
Brand Name: Audioengine
Speaker Type: Subwoofer
Item Display Height: 11.3 in
Depth: 11.3 in
RMS Power Range - Speakers: 125 watts
Peak Power Handling - Speakers: 250 watts
Maximum Speaker Depth (inches): 11.3 in
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Dimensions | Metric :16-3/4” W x 16-3/4” D x 16-15/16” H | 42.5 x 42.5 x 43.0 cm
Driver Complement :One high-definition 14" long throw woofer, pressure coupled to two 14” low bass radiators
Frequency Response :11 Hz – 200 Hz
Internal Amplifier Power :1800 watts
Auto On / Off :Signal Sensing (US) | Signal Sensing and Switched (International)
Power Requirements :110 volts Alternating Current (US) | 220 volts Alternating Current (International)
High Level Inputs :Two pairs of 5 way binding posts
High Level Outputs :Two pairs of 5 way binding posts
Subwoofer Inputs :One LFE input (for SW preout only)
Low Level Inputs :Two low level inputs: left and right low level in
Low Level Outputs :Two low level outputs: left and right low level out
High Level High Pass Crossover :Non Variable 6 dB/octave @ 80 Hz: Available only with high level inputs and outputs only
Low Level High Pass Crossover :12 dB/octave continuously variable from 40 Hz to 150 Hz: Available only with low level inputs and outputs
Low Pass Crossover% :24 dB/octave continuously variable from 40 Hz – 150 Hz: Available only with high level inputs and outputs or low level inputs and outputs
Available Finishes :Piano-Gloss Black
Accessories :Rubber feet; Isolation spikes
Fuse :8 amp 250 volt Slo Blo (US) | 4 amp 250 volt Slo Blo (International)
Weight | Metric :97 lbs | 44.0 kg
Warranty :5 Years; 3 Years for Amplifiers
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