OPERATING THE MULTI .AMP SYSTEM
o Multi-amp systems have more controls than conventional
systems and require more careful adjustments. Perform-
ance varies considerably with the pre-amplifier, power
amplifiers and speakers used, as well as with the acoustics
of the room, and final adjustments must be made while
you are actually listening to the sound.
o Before operating the SF-500, first check all connections
correctly. When re-setting the selector switch, first turn
off the power amplifiers or turn the volume fully down.
3. WAY SYSTEM
1. Turn the LEVEL MID and LEVEL HIGH knobs fully to
the left (i.e. set the levels to the lowest position).
2. Set the crossover frequency selector switch (located on
the bottom of the SF-500) to 3 CH.
3. Turn the pre-amplifier output level knob fully down and
turn on the power to all amplifiers.
4. Turn up the pre-amplifier output level halfway and, also,
the level controls on the SF-500. Play a record or tape.
5. Gradually turn up the pre-amplifier output level until the
desired volume is attained.
6. Adjust the level controls on the SF-500 and the volume
controls on all amplifiers until the sound quality is ideally
suitable to the acoustics of the room.
PIONEETT
2. WAY SYSTEM
1. Check the crossover frequency best suited to your
speakers and set the selector switch on the bottom of the
SF-500 to 2 CH.600Hz or 2 CH.5kHz.
NB. When setting the selector switch to 2 CH.5kHz, first
check that nothing is connected to the MID jacks.
Otherwise the MID range speaker may be damaged.
2. Proceed as explained in steps 3 - 6 for a 3-way system
above.
SPEAKER PHASING
o Since the signals in multi-amp systems are separated by
L2dB /oct. filters, correct phase adjustment of the speak-
ers results in more natural sound. Where the MID range
and HIGH range power amplifiers are fitted with speaker
phase selector switches, set these so that the sound is as
natural as possible, during actual listening. If there are no
switches on the polser amplifiers, try changing the
connections to the speaker terminals.
