WIRING
Speaker Cable Selection
The quality and type of speaker cable used can
have a dramatic impact on system performance.
However, since it is the
relationship
of the
driving amplifier, cables, and speakers that
determines ultimate sound quality, and because
listener preference is a factor, we cannot offer
any specific cable recommendations.
In general, speaker cables should be of equal
length if possible, and as short as possible. The
following chart may be used to select an
appropriate
minimum
wire gauge given a cable
run length.
Wire Gauge
(AWG)
Length
(feet)
Length
(meters)
8
58
18
10 34 10
12
22
7
14 14 4
16
9
3
18 5 2
Connections
Be sure your amplifier is off before making
connections. This will avoid damage that may
result due to accidental shorting of the speaker
cables.
Be certain to observe correct polarity, or phase,
when connecting any loudspeaker to your
amplifier. The positive (red) terminal on the
loudspeaker must be connected to positive
terminal on the amplifier, and the negative
(black) terminal on the loudspeaker must be
connected to the negative terminal on the
amplifier. Also be sure that you make a very tight
connection between the binding post and the
cable connector. Periodic inspection of all
connections is recommended.
PERFORMANCE
Break-In
For optimum performance, new speakers should
be broken-in prior to regular listening. This may
be accomplished by playing moderately loud,
dynamic music or break-in disc for a total of at
least 50 hours. Make certain your amplifier does
not clip from being overdriven, as the heat
generated will damage the loudspeaker! Please
note that damage resulting from abuse is not
covered in the product warranty, and sustained
excessive volume levels should be avoided!
Signal Purity
The 250AM is optimized for use with high-quality
front-end equipment (including cabling) without
use of extraneous processing. If your audio
system offers any such processing –
equalization, loudness, tone controls, DSP
effects, or other enhancement – it should be
turned
off
for optimum performance. Consult the
instructions supplied with your other equipment
to ensure your audio signal is kept as pure as
possible.
POWER
The recommended power rating is provided as a
guideline. In practice, to prevent damage to any
loudspeaker, avoid volume levels beyond where
the sound is “clear”. If the sound becomes
distorted or strained, immediately reduce the
volume.
Higher-powered amplifiers are actually
safer
for
loudspeakers, all else equal, because insufficient
amplification causes distortion that can easily
damage a loudspeaker.
SPECIFICATIONS
Main Drivers
two 5” Aluminum cone
(12.7 cm)
Tweeter
one ¾” polymer dome
(1.9 cm)
Freq. Response (Hz)
40 (F
b
) to 22k
Sensitivity (2.83V, 1m)
87dB
Recommended Power
50 to 200 W
Impedance (rated, min.)
5-ohm, 4-ohm
Dimensions
19.25” x 8” x 11”
(49 x 20 x 28 cm)
Weight 27
lb.
(12.2 kg)
Specifications subject to change
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