Owner's Manual

provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio TV technician for help.
Notes on environmental protection
At the end of its useful life, this product must not be disposed of with
regular household waste but must be returned to a collection point for
the recycling of electrical and electronic equipment. The symbol on the
product, user’s manual and packaging, point this out.
The materials can be reused in accordance with their markings. Through
re-use, recycling of raw materials, or other forms of recycling of old
products, you are making an important contribution to the protection
of our environment.
Your local administrative ofce can advise you of the responsible waste
disposal point.
II. INTRODUCTION
PSB subwoofers are designed to provide the attest possible frequency response, full
bass extension, low distortion and high output. Beyond these characteristics there are
a few other parameters that we feel are very important in the design of a subwoofer.
First and foremost, a PSB subwoofer must be musical. A subwoofer should also have
the ability to play musically even when overloaded or stressed. For this reason PSB
subwoofers incorporate proprietary limiting circuitry preventing audible overload while
remaining true to the dynamics of the music. This circuitry combines peak limiting circuits
that hold amplier signal swing to the point just short of the amplier’s clipping, with
compression circuitry that will reduce the amplier’s gain.
Managing heat dissipation is challenging with today’s greater power demands. Where
suitable, PSB subwoofers use the latest implementation of super efcient Class D power
amplication, featuring an automatically varying switching frequency that maintains
maximum efciency and low THD under all conditions.
PSB woofers are always designed to reduce mechanical noise and prevent harsh
sounds at the excursion extremes. Ports have large radius end ares to reduce noise
from air turbulence. Cabinets and ampliers are designed to prevent air leaks, which can
contribute minute amounts of noise. All of our designs are exhaustively tested to survive
15 continuous hours of being driven to maximum output.
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