Hafler SE240 - Manual (Page 6)

running them parallel to power wiring to reduce the
likelihood of hum pickup.
OUTPUT. The wires which connect the speakers to the
amplifier should be of sufficient size to preserve the SE-
240’s high damping factor.
Standard #18 gauge lamp cord
(zip cord) is satisfactory for up to 15 feet if your speakers
are of 8 ohms or higher impedance. A heavier gauge ( #16
or larger) wire should be used with 4 ohm speakers, or 8
ohm speakers at a greater distance. Special loudspeaker
cables which have adequate thickness to accommodate
long runs are usually available from audio dealers. The
SE-240’s red and black outputs accept standard
banana
plug connectors, including the double ones with 3/4” spac-
ing. These are the most convenient to use if you will be
disconnecting the speakers occasionally. The terminals
will also clamp a spade lug, or a bare wire through the hole
in the center post. Be sure there are no frayed wire ends
which could touch adjacent terminals or the chassis. Tin
bare wire ends with solder to secure all strands.
PHASING. Consistent phase relationships are important
when connecting speakers in order to enable full bass
reproduction as well as mid-range and high frequency time
alignment. To be sure all the speakers in a system are
wired in phase to the amplifier, each ground or ‘-’ speaker
terminal should be connected to its black ground terminal
on the SE-240, and the speaker’s ‘+’ terminal to the cor-
responding red binding post. Speaker connecting cable
identifies one wire from the other by the color of the wire,
or by marking or coloring the insulation. NOTE: In the
special case of monophonic operation of the SE-240,
described later, different speaker connections are
employed.
GROUNDING. The black output terminals of the SE-240
are connected together internally and grounded to the
chassis, This facilitates the use of external devices which
use a common ground connection, such as some head-
phone junction boxes. You must be sure that the ground
or shield connection from such a device goes to a black
terminal on the SE-240. NOTE: No such connection may
be made when the SE-240 is connected for bridged mono
operation.
5
Standard #18 gauge lamp cord
#16
banana