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PSW4000 



manufacturer KEF 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductSerious stuff. No less than 500 Watts of high efficiency Class D amplifier power, with a 300mm (12") long-throw driver in a hand finished MDF cabinet. As you would expect, bass extension is more than generous - but what's really impressive is the way the LF response is immaculately controlled. Output level, phase (infinitely variable) and the low pass filter frequency can be adjusted via radio remote control from anywhere in the home, so the unit can be concealed wherever you please. Model PSW 4000 Design Bass reflex, downward firing Drive unit LF: 300 mm (12") long-throw Frequency response at 15° horizontally off axis ±3 dB 25 Hz - 250 Hz LF Corner -6 dB 22 Hz Amplifier requirements 500 W built in Sensitivity (2.83V/1m) Active system Maximum output 113 dB Impedance Active system Weight 38 kg (83.6 lbs) Dimensions (H x W x D) 465 x 495 x 495 mm 18.3 x 19.5 x 19.5 in. Finishes Black Ash, Maple or Cherry wood veneer  
 
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PSW5000 



manufacturer KEF 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductThe ultimate powered subwoofer - as it would have to be in order to match the awesome performance standards set by the new Reference Series for which it was designed. How does a 1kW Class D amplifier with a 380mm (15") long-throw woofer sound? Simply devastating is the answer. The subwoofer can be adjusted via radio remote control from anywhere in the home, so the unit can be concealed wherever you please. From the furniture quality real wood enclosure in Black Ash, Maple or Cherry to the tips of its gold plated terminal block, PSW 5000 includes performance without compromise. Model PSW 5000 Design Bass reflex, downward firing Drive unit LF: 380 mm (15") long-throw Frequency response at 15° horizontally off axis ±3 dB 18 Hz - 250 Hz LF Corner -6 dB 16 Hz Amplifier requirements 1000 W built in Sensitivity (2.83V/1m) Active system Maximum output 118 dB Impedance Active system Weight 60 kg (132 lbs) Dimensions (H x W x D) 545 x 590 x 590 mm 21.5 x 23.2 x 23.2 in. Finishes Black Ash, Maple or Cherry wood veneer  
 
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PV1 



manufacturer B&W 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductAt one time, subwoofers that had any pretentions to good performance were big and ugly. Later, as engineers got to grips with designing robust drivers that could withstand high levels of electronic equalisation, they became small and a little less ugly. Yes, there were subwoofers that paid lip service to styling, but generally their performance was compromised. No more. The PV1, although elegant and stylish, owes its curved shape to sound engineering principles - those of a pressure vessel, from which the initials in the name derive. From a simple bubble to a sophisticated deep sea diving bell, a spherical form is the ideal shape to accommodate pressure differences between the inside and outside of the enclosure - and there can be considerable pressures generated inside compact subwoofers. The strength of the form enables a relatively thin wall construction to the aluminium enclosure, maximising the internal volume.Twin 200mm (8-in) drivers operate back to back to minimise pressure differences throughout the internal volume, which increases the spherical form's ability to withstand vibration and reduce coloration. The driver diaphragms too are built to withstand pressure, being a three layer construction of mica cone, expanded polystyrene filler and concave aluminium outer skin.Coupled to 500 watts of ICEpower® amplification, the drivers have the dynamics and control to deliver all a subwoofer should, from the loudest movie effect to the delicate portrayal of the acoustic of a large concert hall. For the largest installations, multiple subwoofers can be daisy chained for higher output levels.The subwoofer accepts both line level and speaker level inputs, the input panel being hidden discreetly in the base, and the flush controls at the side provide the flexibility to marry the subwoofer to a wide variety of speakers, from our FPM Series to more conventional designs. The PV1 is available in a choice of finishes - silver with mid grey trim, or gloss black with dark grey trim Description Active closed-box subwoofer Dimensions Height: 335.5mm 13.2 in) Width: 289mm (11.4 in) Depth: 347mm (13.7 in) Net Weight 20.5kg (45 lb) Freq. Response ±3dB 21Hz – 31/110Hz adjustable (EQ at i) Freq. Range -6dB at 18Hz and 40/140Hz adjustable (EQ at i) Drive Units Unit 1: 2x ø200mm (8 in) mica / aluminium cone long-throw Unit 2: Unit 3: Finish Gloss silver with grey trim Gloss black with anthracite trim Gloss white with chrome trim Sub Woofer Amplifier Description: Class-D ICEpower® Power Output: 500W Input Impedance: 100k ohms 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) 10m cable with FCC68 4/4 plug supplied Outputs: Link Out (RCA Phono) Low Pass Filter Active 2nd -order, variable cut-off frequency (applies only to speaker level input  
 
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YST-S225B 



manufacturer Yamaha 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductYamaha’s YST-SW225B subwoofer combines 150W of dynamic power with exclusive QD Bass and Advanced YST II technology to provide top-class sound quality. QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions. The reflective plates (not used in competitors’ down-firing subwoofers) negate any effects caused by the floor surface and reduce resonance between sound waves reflected from the floor and the unit. Unlike most other systems, QD-Bass reduces turbulence by radiating in four directions to avoid reflection from the legs of the cabinet. This means that the YST-SW225B generates extraordinary power and smooth frequency response from an extremely compact unit and allows greater freedom of placement because the sound radiates with equal effectiveness in all directions. Advanced YST II Yamaha's newly developed Advanced YSTII (Yamaha Active Servo Technology II) combines negative impedance and constant-current principles to drive the speaker cone with even tighter control than in previous models. Using Advanced Negative Impedance Converter (ANIC) circuits, this system dynamically optimises effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound pressure levels, for more natural and energetic bass reproduction. PWM Digital Drive high efficiency amplifier The YST-SW225B has a highly efficient power amplifier, enabling it to deliver high power outputs at deep bass levels, with excellent stability and low power consumption. It also delivers stable power output with high efficiency while minimising power consumption and heat production. Because it does not require an output filter coil, both noise and distortion are extremely low. New linear port The linear port provides smooth bass response during playback and minimises extraneous noise. BASS The BASS (Bass Action Selector System) function lets you switch between Movie and Music modes, providing the optimum frequency response in each case. Environmentally friendly The internal parts and circuit boards of the YST-SW225B do not contain lead, which is often used in other subwoofer brands, and is harmful to the environment. It also has a low-power standby mode, in which power consumption is only 0.5W. Other notable features: 20cm (8inch) multi-range driver with magnetic shielding 28-200Hz low frequency reproduction Auto Standby with sensitivity selector (HIGH, LOW and OFF)  
 
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YST-SW1500B/C 



manufacturer Yamaha 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductThe YST-SW1500 uses Yamaha’s Advanced YST as well as brand new technologies such as QD-Bass to deliver exceptionally crisp, clean, powerful bass all the way down to 16Hz. Delivering 1500W of power; the YST-SW1500 has an extremely efficient, high-power amplifier built in, and uses an extra-long stroke, drivers that provide outstanding power with low distortion. The YST-SW1500 also introduces a Dual-Bias system with a 100mm (4") diameter voice coil for the ultimate in power and performance. High-Efficiency Power Amplifier and Power Supply The YST-SW1500 delivers high power outputs at deep bass levels, with excellent stability and low power consumption, even with their compact cabinets. This is made possible by highly efficient power amplifier technology and a new power supply. The power amplifier achieves superior conversion efficiency by supplying maximum power (minimizing power loss) from the power transistors according to the output level. It delivers stable power output with high efficiency while minimizing power consumption and heat production. It does not require an output filter coil, resulting in extremely low noise and distortion. High speed transient response is also excellent. The YST-SW1500 uses a new power supply that features superior load characteristics, minimal noise, higher efficiency and greater stability. Switching power supplies, commonly used in audio and other consumer products are small and efficient, but suffer from noise problems, requiring additional components to solve. This power supply, however, holds the voltage and current levels to zero while the device turns on and off. This reduces noise to 1/30 of conventional switching power supplies. Power loss during switching is also reduced, enabling incredibly high power conversion efficiency. Other advantages of this power supply include superb stability against power load fluctuations, large capacity, low impedance and silent operation. Extra-Long Stroke, Pure Spruce Dual-Bias Drivers These new drivers provide outstanding power with low distortion and are superior to conventional drivers for a number of reasons. Due to the use of a vertically aligned, dual magnetic circuit structure with 100mm (4") diameter voice coils; they are able to handle extremely high input power in a compact unit, with low radial distortion. Additionally, the vertically symmetrical gap magnetic flux density distribution reduces second harmonic (asymmetrical) distortion. Double spider construction also aids in handling high bass inputs without cone deformation. And the strong die cast frame firmly anchors the entire body including the magnetic circuit, guaranteeing a structure that will not fail under powerful forces. YST-SW1500 Notable Features: BASS (Bass Action Selection System) LFE (Low Frequency Effect) input for more faithful reproduction without phase distortion HPF (High Pass Filter, 80 Hz/100 Hz) output for music listening Remote control unit 2-way binding-post speaker terminals (banana-plug compatible) Magnetic shielding Auto Standby with sensitivity selector (HIGH, LOW and OFF) Phase control (normal or reverse) Two input connections: speaker level or line level Ultra-thick (25cm; 1”) real wood cabinet with Yamaha Three-Way Mitered construction for reduced additional resonance Low (1W) standby power consumption  
 
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YST-SW515B 



manufacturer Yamaha 
Price $ POA 
Category Subwoofers 
IMAGE 
Notes on ProductYamaha’s YST-SW515B subwoofer combines 270W of power with advanced technology to provide top-class sound quality, making it an ideal match for your speakers. QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions. The reflective plates (not used in competitors’ down-firing subwoofers) negate any effects caused by the floor surface and reduce resonance between sound waves reflected from the floor and the unit. Unlike most other systems, QD-Bass reduces turbulence by radiating in four directions to avoid reflection from the legs of the cabinet. This means that the YST-SW515B generates extraordinary power and smooth frequency response from an extremely compact unit and allows greater freedom of placement, because the sound radiates with equal effectiveness in all directions. Advanced YST II for awesome bass Yamaha's newly developed Advanced YSTII (Yamaha Active Servo Technology II) combines negative impedance and constant-current principles to drive the speaker cone with even tighter control than in previous models. Using Advanced Negative Impedance Converter (ANIC) circuits, this system dynamically optimises effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound pressure levels, for more natural and energetic bass reproduction. PWM Digital Drive high efficiency amplifier The YST-SW515B delivers high power outputs at deep bass levels, with excellent stability and low power consumption, even with its compact cabinet. This is made possible by a highly efficient power amplifier. The amplifier achieves superior conversion efficiency by supplying maximum power from the power transistors according to the output level. It delivers stable power output with high efficiency while minimising power consumption and heat production. It does not require an output filter coil, resulting in extremely low noise and distortion. High speed transient response is also excellent. New linear port The linear port provides smooth bass response during playback and minimises extraneous noise. BASS The BASS (Bass Action Selector System) function lets you switch between Movie and Music modes, providing the optimum frequency response in each case. Environmentally friendly The internal parts and circuit boards of the YST-SW515B do not contain lead, which is often used in other subwoofer brands, and is harmful to the environment. It also has a low-power standby mode, in which power consumption is only 0.5W. Other notable features 25cm (10 inch) multi-range driver with magnetic shielding 20–160Hz low frequency reproduction Auto Standby with sensitivity selector (HIGH, LOW and OFF)  
 
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