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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 |
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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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Impact Series: High Performance, High Value Subwoofers
The down-firing port on the Impact-12 gives more bass output with less distortion than similarly priced subwoofer from other companies. With its 275 watts of amplifier focused on the 29 Hz to 140 Hz frequencies, you get a ton of bass for you dollar. You can blend the Impact-12 with your satellite speakers using the adjustable low pass crossover frequency feature. All this great sound is wrapped up in an attractive black ash wood grain colored cabinet with black gloss trim.
Features
- Compact, stylish cabinet; high-value subwoofer
- High quality, long throw drivers
- 12" forward firing coated fiber woofer
- Down-firing port minimizes distortion
- 2" copper-wound voice coils for exceptional reliability
- “Green” MDP amp rated at 275 watts Dynamic power
| Length |
No |
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| Accessories |
N/A |
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| Amplifier |
165 watts RMS, 275 watts Dynamic Power |
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| Auto On/Off |
Yes |
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| Cabinet Design |
N/A |
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| Color |
Black Ash Wood Grain |
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| Dimensions: (H/W/D) |
15.1" x 14.2" x 18.9" (38.4 x 36 x 48 cm) |
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| Frequency Response (+/-3 dB) |
29-140 Hz |
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| HiPass Crossover |
Full Range |
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| LoPass Crossover |
50 Hz-200 Hz |
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| Phase Control |
0, 180 Degrees |
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| Removable Grille |
Yes |
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| Shipping Weight |
33 lbs. (15 kg) |
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| Size |
Large |
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| Voice Coil |
2" dual layer copper-wound |
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| Warranty (N. Am.) |
Two years (electronics & drivers - parts & labor) |
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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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Product Series Subwoofers
Speaker Type Subwoofer
Frequency Range (+/-3 dB) [Hz] 28 - 190
Maximum SPL [dB] 112
Crossover Frequency [Hz] 40 - 120 Hz
Low Frequency Driver 1 x 12" long stroke Polymere Aluminimum
Enclosure Type Bass Reflex
Bass Reflex Tuning Frequency [Hz] 36.0
Max. Amplifier Power Output [RMS watt] 220
Continous IEC Power Output [RMS watt] 170
Input Impedance [Ω] 25K
Connection input(s) Mono line level (LFE)
Stereo line level (low pass filtered)
RCA
Magnetic Shielding No
Recommended Placement Floor
Near wall or corner
Recommended Distance From Wall [cm] > 5
Functions Crossover Frequency
Phase Switch
Standby (Auto Power) On/Off Switch
Volume (Gain)
Maximum Power Consumption [W] 250
Max. Dimensions Incl. Base And Grille (HxWxD) [mm] 370 x 340 x 380
Weight [kg] 14.7
Accessories Included Manual
Rubber Bumpers
Spikes M6
Finish Black Ash Vinyl
Light Walnut Vinyl
White Vinyl
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