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To accurately reproduce sound, and audio system must cover the entire audible frequency range. It must reach the highest harmonics and the lowest fundamentals. It must convey the delicacy of a brushed triangle as well as the authority of timpani drums.  Size, price and design considerations often compromise the deep bass response of full-range loudspeakers. They lack the bass extension and intensity to correctly duplicate the low frequencies that form the critical foundation of sound. They sacrifice deep bass detail in exchange for midbass or midrange performance.   Vandersteen Model 2W series subwoofers augment the deep bass response of your present speaker. They provide the power, dynamics and low frequency detail required for superlative reproduction of music and film. They assume the responsibility for deep bass
reproduction, improving the mid-bass and midrange response of your system.  The 2W subwoofer series benefits from our years of experience designing and building loudspeakers of unparalleled value and performance. It couples advanced materials, construction and design with innovative technology in a system that is always true to the emotion and content of the original sonic source.  The 2W series is completely upgradeable. As future improvements in technology and/or materials enhance the subwoofers' capabilities, cost-effective updates will be available to upgrade existing units to the latest components, performance and specifications.  

The System
The subtlety of a plucked bass, the complex harmonics of an organ and the incredible power of modern movie sound effects are all beyond the reach of many speaker systems.  Even subwoofers rarely excel at all three, their designers choosing to compromise one in exchange for proficiency at another. Vandersteen Audio refused to compromise. The original Model 2W spent five years in the prototype stage being tested, evaluated, measured and revised before its introduction in 1984.Equal exhaustive attention was paid to the new technology of the 2Wq and V2W.  Vandersteen 2W series subwoofers use three active eight inch drivers rather than a single large woofer. The three eight inch drivers equal the cone area of a fourteen inch woofer, but with much higher motor-to-cone-area ratio. The high ratio improves pitch definition and insures stable frequency and phase responses throughout and beyond the drivers ’ operating range. This allows more crossover design flexibility since a steep-slope, high-order crossover is not necessary when the drivers perform well several octaves past the crossover frequency.  The drivers are downward firing in a front slot-loaded configuration to provide superb bass detail, impact and dynamics while minimizing any potential midrange interference. Each of the drivers uses a heavy duty 1 1/2 inch, four layer voice coil engineered to
withstand high temperatures. Each voice coil is within a massive 40 oz, high gauss magnet structure for increased control and efficiency .Critically damped, long fiber cones with environmentally stable butyl rubber surrounds are used for excellent rigidity and linearity.  The drivers are connected to a built-in 300 watt amplifier with advanced feed-forward error correction. This powerful amplifier provides the benefits of bi-amplification to the system without the additional expense and complexity of an additional separate amplifier.  The cabinets of the 2W series subwoofers are constructed of MDF (Medium Density Fiberboard), a wood product far more dense and acoustically inert than particle board. FFT analysis and listening tests refined both the shape of the enclosure and the placement of the internal braces. The entire structure is carefully designed to minimize cabinet resonances that could affect the system ’s performance. 

Feed-Forward Error Correction
Many subwoofers use a negative feedback or servo control type of error correction that samples the output of the subwoofer amplifier or the movement of the driver and makes comparisons to the original input. When a deviation is detected, a correction signal is generated to counter the error. A shortcoming of these systems is that an error must actually occur before the correction process can begin. The negative feedback and the non-linearity's of the correction create their own audible distortions that compromise the performance of the subwoofer. The 2W series uses Feed-Forward Error Correction (FFEC), which eliminates the errors before they begin. Extensive spectrum, FFT and dynamic analysis of the 2W detected the errors that would occur during normal use. The inverse of these errors was then designed into the integral amplifier to eliminate the errors before they could occur. Errors resulting from coupling, loading, driver phase and frequency non-linearities and thermodynamic box loss are eliminated by FFEC.  

Dedicated Models
Two versions of the 2W subwoofer are available, each engineered and optimized for specific situations. The 2Wq receives its input from the power amplifier and is designed to maintain maximum sonic continuity between the subwoofers and main speakers in all music and home theater systems where a crossover can be inserted between the preamplifier/processor and the main power amplifier. The V2W accepts line-level inputs exclusively and is designed for home theater systems with integrated processor/amplifier units where the bass is handled by a line-level subwoofer channel.  The 2W subwoofer series is compatible with a wide range of main speakers from Vandersteen and other manufactures. Large main speakers with accurate frequency and phase response extending at least an octave below the crossover point will provide optimum blending and linearity through the crossover region. (Basic filter theory dictates that the main speakers must have predictable response at least an octave below the crossover point to insure seamless blending and linearity with the subwoofer.) Smaller, limited-range main speakers will benefit from the 2W series' superior pitch definition and lack of midrange interference which provide better integration and system coherence than is possible with a conventional subwoofer.

• Drivers:
• (3) 8" critically damped, long fiber cones with butyl rubber surrounds. 1.5 inch, 4 layer
• voice coils in 40oz. magnet structures.
• Crossover:
• 6dB per octave at 80Hz. Requires and external high-pass crossover between the
• preamplifier matched to the input impedance of the power amplifier.
• Amplifier:
• 300 watt with no current limiting. Input impedance more than 100,000 ohms. Uses 10
• watts at idle.
• Controls:
• Adjustable sensitivity to match main speakers with efficiencies between 82dB and 100dB
• System Q adjustable from .5 to 1.2.
• Inputs:
• (2) pair of banana jacks accept high-level output from the main amplifier.
• System:
• Second order, slot loaded. Pulse overshoot less the 1/2 cycle. -3dB at 20Hz and 80Hz.
• Physical:
• 18.5" high X 18" wide X 17"deep. 91 pounds gross. 80 pounds net.
• Commitment
• Vandersteen Audio was founded in 1977 with the commitment to offer the finest music
• reproduction products. Company goals of value, reliability and customer support lead us to
• develop new innovative products and improve existing ones. There will always be a high
• degree of pride, love, and personal satisfaction involved in each piece before it leaves our
• facilities.
• Each 2W subwoofer undergoes numerous tests prior to leaving the factory. Each driver,
• crossover and amplifier is tested for proper performance. The completed speaker is highpower
• sweep tested for structural integrity, and FFT analyzed for correct response and
• performance. this intense commitment to product quality and reliability is unsurpassed in
• the audio industry.
• Natural Coherence
• Every aspect of the 2W series, from the dedicated features, to the innovative internal
• amplifier, to the use of feed-forward error correction, enhances the seamless blending
• between the main speakers and the subwoofer. Ultimately, a subwoofer should never
• sound like a subwoofer. It should integrate so well with the main speakers that it is
• indistinguishable in the system. It should never call attention to itself. The bass should
• simply be more detailed, extended and powerful; the sound more open, transparent and
• articulate. This consistency of sound, a natural coherence, is essential to long term
• listening enjoyment.