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Connecting the power:
For lowest insertion noise keep the power supply unit away from any audio connections. Plug the power adapter cord into the
rear 9VDC input on the rear. The JD7 does not have a power on-off switch for two reasons: (a) the Class-A circuit will sound
better once the unit has gained electrical and thermal stability, and (b) on-off transients can devastate speakers down the line if
'popped' by switching on at full volume. Always switch amplifiers on last.
Power supply and DC supply lock: The JD7's power supply input is outfitted with a handy cable lock. Simply unscrew the
lock, pass the DC supply cable through the hole and tighten. This will keep the DC supply jack safely in place and prevent
accidental unplugging.
Connecting guitars and amplifiers:
Make sure all of the channel output switches are set to the 'off' position (LED light out) before making connections. Turn all
guitar amplifier levels down to eliminate connection 'popping'. Caution must be observed when connecting older and non-
grounded (2-prong) amplifiers. Please read the
connection.
Making connections:
A typical routing example.
2
CAUTION
notice at the beginning of this manual regarding equipment
Connections
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