NVX XQW102 User manual
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The X-Series
Thank you for choosing the NVX X-Series. Our X-Series is a crowning achievement of modern loudspeaker
engineering – decades of research, development and installation experience have combined to create a truly
remarkable subwoofer. Our uncompromising approach to manufacturing is unique in the industry, and shines
through brightly in the quality and performance of the X-Series. We are proud to build the nest subwoofers
on the market today, and we are condent you will soon be proud to own one.
Great loudspeakers begin with great engineers, and for the X-Series we partnered with the very best, bringing together
experts from around the world. The X-Series began in Denmark as a vision of our extraordinary engineers who
transformed decades of knowledge and experience into a state-of-the art subwoofer with accuracy, transient response,
and tonal quality that is stunning. To mold our woofers into high delity bass machine, we brought them home to the
United States. We refused to compromise the sound, output or durability, so we assembled a team of engineers who
have designed some of the most groundbreaking and celebrated products in subwoofer history. Our US team added
patented technologies to dramatically increase our subwoofers’ output potential without sacricing the sound accuracy
we worked so hard to capture.
Read on to learn about the features incorporated into our X-Series subwoofers that separate them from the competition.
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Cone
After testing scores of different cone materials, we decided on a custom blend of nely milled pulp & Egyptian Papyrus
bers. This stiff yet lightweight material produces spectacularly accurate bass with a rich, natural tonal quality prized by
audiophiles. The smooth matte nish of the cone offers a sleek, modern accent to the interior of any car.
Surround/Suspension
The X-series include oSd surround technology (U.S. Patent #7,031,487 B2) which is an innovative design where
the surround is attached vertically. As a result, the X-Series have an extra 8-12% more surface area than competing
subwoofers with the similar mounting dimensions. The surround itself is constructed with a multi-radius elliptical edge,
which keeps the inward movement of the surround perfectly symmetrical with the outward movement. This contributes
to a more predictable and consistently linear cone movement for smooth, even bass every time.
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Aluminum Shorting Ring
Perhaps the most distinguishing component of the X-Series subwoofers is the innovative aluminum shorting ring sys-
tem. This technology prevents a rise in inductance caused by the movement of the driver, which has several positive
impacts on the subwoofers’ performance:
1. Improved power delivery to the voice coil
2. Decreased inductive distortion
3. Improved cone linearity
4. Improved high-end extension
5. Decreased risk of overheating
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What is this shorting ring?
The shorting ring is a conductive aluminum ring placed in the air gap between the pole piece and the voice coil former
to reduce inductance. Inductance can best be understood as the change in magnetic energy that occurs as the voice
coil moves in and out of the air gap. In most subwoofers this energy is absorbed by the voice coil, causing impedance
rise, introducing distortion and reducing the woofer’s ability to play at the top of the bass spectrum. In the X-Series
subwoofers, the shorting ring simply absorbs changes in inductance, optimizing the sound quality, output potential
and frequency response of the woofer.
AB
A.
B. Aluminum Shorting Ring
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So why does it work?
●Improved power delivery to the voice coil
►Any increase in inductance correlates to an increase in voice coil impedance, meaning increased resistance to
the input power. By preventing inductance rise, we effectively increase the amount of power carried to the voice
coil, increasing the output potential of the woofer with each given watt.
●Decreased inductive distortion
►When inductive energy is introduced into the motor structure, it causes the subwoofer to produce sounds and
artifacts at higher frequencies around the 500-1,000 Hz range. Our aluminum shorting ring absorbs these changes
in inductive energy, resulting in crisp, distortion-free bass.
●Improved cone linearity
►A great deal of care was taken during the research and development process to ensure that the movement of the
cone is as linear as possible. Since inductance is a change in magnetic energy, it’s easy to see how undesired
inductance can alter the movement of the cone. By using our shorting ring, we absorb these changes in magnetic
ux and prevent modulation of the cone resulting in tighter, more accurate bass.
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● Improved high-end extension
►The low-pass lter in a standard crossover network is basically just a coiled conductive wire with an iron core
very similar to the design of a voice coil. When the inductance of the voice coil increases, it begins to lter out notes
at the top of the woofer’s frequency range. Our aluminum shorting ring eliminates these variations in inductance,
allowing the woofer to play as it was intended.
●Decreased risk of overheating
►In addition to the positive impact the shorting ring has on the subwoofer’s sound quality, it also acts as an effective
heat sink to carry heat away from the voice coil, which contributes to improved performance and durability.
If it’s so great, why don’t others use it?
Where we see an opportunity to build a better product, other manufacturers see an opportunity to maximize prots.
Shorting rings require additional materials and add complexity to the manufacturing process. Rather than skimp on the
shorting ring and make inferior woofers, we ultimately decided to create a masterpiece. The most experienced engi-
neering team in the industry has painstakingly designed our X-Series subwoofers, and we rmly believe that you will
hear the difference.
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Optimized for Small Enclosures
While the NVX X-Series are not the only subwoofers on the market that thrive in small enclosures, they also offer an
unparalleled combination of deep bass and shallow mounting depth. The truth is, while some competitive woofers may
work well in small volume enclosures, they require as much as 8-inch of depth, far too much to t behind a truck seat
or in a small trunk. Our subwoofers produce deep bass and sound great in enclosures as shallow as 5-inch. The NVX
X-Series is the discerning listener’s alternative to anemic shallow-mount subwoofers and costly vehicle-specic
solutions.
3-inch High Temperature Voice Coil
The X-Series subwoofers are capable of handling a robust amount of wattage (500 watts RMS for the 10-inch and
600 watts RMS for the 12-inch) due in large part to the 3-inch voice coil. The voice coil is composed of an oxygen-free
copper coil wrapped around a high-temperature aluminum former for maximum conductivity and heat dissipation. This
coil is large enough to drive the cone with strict control and impressive linearity, yet efcient enough to permit a compact
magnet structure for increased installation exibility.
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Custom Low Turbulence Cast Aluminum Basket
Our custom basket offers several distinct advantages over traditional designs. We purposefully chose an especially
open basket to improve airow to reduce compression of the motor structure for both improved cone control as well as
reduced back-wave interference. The 3-dimensional cast design dramatically increases the strength and rigidity of the
basket while simultaneously reducing resonance. We chose aluminum, the industry standard for cast speaker baskets,
as it offers an exceptional strength-to-weight ratio and is non-ferrous, thus eliminating risk of magnetic interference with
the motor structure. The unique cast aluminum mounting ring offers a sleeker and more modern aesthetic than typical
bulky rubber or plastic designs.
A
B
C
A.
B.
C. High Temperature Voice Coil
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High-Excursion Strain-Relieved Tinsel Leads
There is perhaps no better example of our relentless attention to detail than the unique attachment method of our tinsel
leads. Whereas the leads of most subwoofers are simply glued atop the spider, ours are glued at the basin of each
fold in the spider with enough slack on top for unrestricted excursion. This prevents damage to the leads as there is no
tugging or pulling from the movement of the suspension, while keeping the leads anchored to prevent cone slap and
mechanical noise.
Installer-Friendly Terminals
The X-series subwoofers were optimized for both sound quality and ease of installation. The subwoofers feature dual
voice coils, and we placed all four terminals on one side for simple and hassle-free wiring. To solve complex wiring
challenges, a pair of jumper cables is included to allow the subs to easily be congured in parallel, series or any
combination necessary.
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