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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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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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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
![acrobat_reader_logo.]( "acrobat_reader_logo.") User's Manual AVAILABLE IN THESE COLOR FINISHES ![colors2]( "colors2")
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Length No
Accessories Mic, mic stand, remote control
Amplifier 390 watts Dynamic/195 watts RMS Power
Auto On/Off Yes
Cabinet Design Extended Excursion Down-firing port
Color Black Ash Wood Grain
Dimensions: (H/W/D) 16.75” x 15.25” x 17” (includes feet and grille) (42.5 x 38.7 x 43.1 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 39 lbs. (18 Kg)
Size Large
Voice Coil 2-Layer copper
Warranty (N. Am.) Two years (electronics & drivers - parts & labor)
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With the down-firing port on the Impact-10, you get more bass output with less distortion than other companies' subwoofers that cost about the same. With its 250 Watts of amplifier power generating bass in the 32 Hz to 140 Hz spectrum, you get powerful output even in our entry-level subwoofer. Using the adjustable low-pass crossover frequency feature, you can blend the Impact-10 with your home theater satellites, gaming system or music speakers. The Impact-10's attractive black ash wood grain colored cabinet with black gloss trim complements your decor.
Features
Compact, stylish cabinet; high-value subwoofer
10" forward firing coated fiber woofer
Down-firing port minimizes distortion
2" copper-wound voice coils for exceptional reliability
"Green” MDP amp rated at 250 watts Dynamic power
![acrobat_reader_logo.]( "acrobat_reader_logo.") User's Manual ![acrobat_reader_logo.]( "acrobat_reader_logo.") Specifications ![]()
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Type Advanced YST II and QD-Bass Subwoofer
Driver 25cm(10'') cone
Dynamic Power 250 W
Frequency Response 20-160 Hz
Advanced YST Advanced YST II
QD-Bass Technology Front-firing
High-Efficiency Power Amplifier Yes
Linear Port Yes
BASS (Bass Action Selector System) Yes
Standby Power Consumption 0.3 W
Dimensions (W x H x D) 380 x 368 x 420 mm
Weight 18.5 kg
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