Overview: The Definitive Technology SuperCube III is a
compact, high-quality powered subwoofer intended for use in a music or home
theater system. The SuperCube III powered subwoofer allows for easy, seamless
integration into almost any two-channel or multichannel speaker system;
delivering true, accurate, and extremely deep bass in any room. The
SuperCube III is finished in a piano-gloss black lacquer finish with a black
non-removable cloth grille.
Passive Radiator Design: The
SuperCube III features a 650-watt (RMS) class D amplifier driving
a 7-1/2 inch SuperCube Technology woofer pressure coupled to two side-firing 7-1/2 inch
Ultra Low Bass Radiators. The total piston area is greater than a 12-inch
diameter woofer but with far greater speed, musicality, and control than a
single large diameter woofer could deliver.
PowerField Technology Amplifier: The SuperCube III incorporates
Definitive's proprietary PowerField technology, by which the amplifier is
specifically engineered in conjunction with the driver for optimum load matching
and power transfer characteristics. The SuperCube III is powered by a 650-watt (RMS) class D amplifier. The result is
high-definition bass performance extending effortlessly down to 16 Hz.
High-Definition Subwoofer: The powerful, high-definition
7-1/2 inch long-throw subwoofer driver is specifically engineered by Definitive Technology to deliver rock-solid low distortion bass, reaching down to the lowest subsonic frequencies (16-200Hz), with superior
transient response. The special ultra-stiff, low-mass cone (for super-fast
transient response) is joined to a specially formulated surround and long-throw
voice coil and spider. The ultra-rigid basket is engineered to hold the woofer's
massive magnet structure and large voice coil in absolute alignment. The high
temperature voice coil is made of aluminum wound with triple insulated
ultra-pure copper wire and baked in epoxy for increased power handling.
Non-Resonant Cabinet: The cabinet of a loudspeaker plays a large part in its sonic performance.
Resonance and vibration can add unwanted distortion as well as drain away
important energy from the system. The Definitive Technology SuperCube III
powered subwoofer utilizes a monocoque cabinet, which has been specifically
engineered to be totally inert and vibration free, to ensure you of pure sonic
reproduction. Monocoque means that the cabinet is of a unitized construction
where all panels are permanently joined together into one solid structure. The
cabinet walls themselves are high-density medite fused together by space-age
polymer adhesives. The front and rear panels nearly 2-inches thick and the cabinet,
itself, incorporates multiple internal braces to ensure total solidity.
Protection Circuits: The Definitive Technology SuperCube III features two protection circuits that ensure
that the subwoofer can never be overdriven.
Interchangeable Feet: The SuperCube III comes with 4 rubber feet and 4
spiked feet for safe and secure placement of the powered subwoofer on your
carpet or hardwood floors.
Placement: The Definitive
Technology powered subwoofer has been designed to operate at frequencies
generally below 150 Hz. Because low-frequency information in this range
essentially is non-directional, your subwoofer can be located anywhere in your
listening room that is most convenient. Also the continuously variable low-pass
filter operate at a very fast roll-off, ensuring great performance wherever you
place the subwoofer. There are, however, some general rules that you should bear
in mind when locating the powered sub.
Subwoofer Controls: A complete
array of controls allow the SuperCube III to be perfectly integrated with any
stereo or multi-channel audio system, and tuned for optimum performance in any
Volume Control: The SuperCube III features a rear-mounted volume control.
This control is used to raise or lower the output level of the subwoofer in
relation to the other speaker in your system.
Variable Low-Pass Crossover: The Definitive
Technology powered subwoofer features a continuous variable low-pass filter
control on the back-panel. This filter is continuously variable between 40
and 150 Hz. It "rolls-off" (24dB/oct) the high-frequency response of your
subwoofer so only low-frequencies below the desired setting will be heard.
This low-pass filter control is used to obtain the optimum transition
between the subwoofer and your main speakers.
Variable Phase Alignment: The powered subwoofer features a
rear-panel variable phase control dial with a range of 0-180 degrees. This
control is used to perfectly blend the output of your subwoofer with your
main speakers to compensate for any possible problems due to placement
Auto Turn-On Circuit: The powered subwoofer has a special power
circuit which automatically turns the powered subwoofer on when a signal is fed
to the loudspeaker and turns it off when there is no signal present, so it does
not require an on-off switch.
LED Indicator: The red LED on the back panel of the powered subwoofer
will light up when a signal is sensed and the amplifier turns on. It will
automatically turn off with the powered subwoofer, a little while after the
signal is discontinued.
Line-Level & Speaker-Level Connections: The
Definitive Technology SuperCube III powered subwoofer has a complete range of
inputs and outputs to allow easy and effective hookup to any system. Both (high)
speaker level and low-level inputs are provided in case you do not have a
subwoofer output. In addition, the SuperCube III has a separate direct-in LFE
low-level input (which bypasses the crossover network).
Low Level Inputs: This input is an RCA type LFE/Stereo
input. If you are connecting your subwoofer to an A/V receiver with an LFE
or Subwoofer preamp output, connect a single RCA cable to the LFE input. If
you are connecting your subwoofer to an AV receiver without a dedicated
subwoofer or LFE preamp output, but does features a stereo RCA output, use a
stereo RCA cable for connection.
Speaker Level In: The Speaker Level inputs (binding
posts) are designed to be used on receivers or amplifiers that do not
incorporate any RCA type subwoofer outputs. If your receiver is equipped
with an RCA type subwoofer outputs, these speaker level inputs should not be
Speaker Level Output: The
SuperCube III also features speaker level outputs (binding posts), so you can
connect your front (main speakers) through the powered subwoofer. The
SuperCube III has a built-in speaker level high-pass crossover preset at 80 Hz
- For maximum output the subwoofer should be placed in a corner or
against the wall; leaving roughly 2- to 4-inches of clearance between the
subwoofer and the wall(s).
- Corner placement will increase the
subwoofer's efficiency, which in turn will increase your system's maximum
output and improve the dynamic capability of the subwoofer.