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Voice Coil – The construction of the voice coil is designed to
maximize the speaker's power handling. The wire used is high
temperature copper, wound in multiple layers on a black, anodized
aluminum former. The wire will withstand high temperatures while
the former conducts heat away from the coil.
Powder Coated Basket – The stamped steel baskets of the Punch
Audiophile woofers are finished with a powder coat process. This
good looking finish damps the basket resonance, preventing basket
vibration from coloring the sound. Unrelated to the sonic perfor-
mance of the speakers, but equally important, the powder coating
used is environmentally friendly since no toxic chemicals are re-
leased into the atmosphere during the process.
Epoxy Filled Inverted Dust Caps – The inverted dust cap provides a
flatter power response and rigidity to the cone. Epoxy filling adds
mass, to ensure the high performance in small, sealed boxes.
Dual Input Terminals – To facilitate hook-up in multiple driver
configurations, each positive and negative terminal has two connect-
ing lugs. The positive terminal is identified by a dot which also
indicates the speaker's impedance. A red dot is used on an 8Ω
speaker, a violet dot on a 4Ω speaker.
LOW FREQUENCY SPEAKER SYSTEMS
The Punch Audiophile woofers require an enclosure to achieve
optimum results. The enclosure allows the speaker to operate at lower
frequencies with improved power handling. The two most commonly
used types of low frequency speaker systems are acoustic suspension
and bass reflex. The acoustic suspension enclosure, commonly
referred to as a sealed box, relies upon the changing air pressure in a
tightly sealed chamber of its operation. The bass reflex, commonly
referred to as a ported enclosure, uses a vent inserted into the box
which takes over for the speaker at a desired frequency which is
determined by the internal volume of the enclosure and the size of the
vent used. The Punch Audiophile woofers will yield optimum perfor-
mance in a small, sealed enclosure.