User guide

<<<<<<< CAUTION >>>>>>>

Please read before connecting

electronic devices to your JX2!

Caution must be used when connecting electronic equipment to

the JX2 switchbone. The JX2 bridges all electronic equipment

connected to it so faulty wiring or incorrect grounding of any of

the equipment may cause a shock hazard to be present and/or

damage to the JX2 or other connected equipment. Because

grounding schemes differ between manufacturers, it is important

to check for correct polarity, in particular with older ampliﬁers

using 2-prong unprotected A/C cords. If the polarity is reversed

on an ungrounded ampliﬁer there may be a potential of 120V

present between the amp chassis and ground. Radial Engineer-

ing takes no responsibility for this or how the JX2 is connected

or used. It is the user’s full responsibility to ensure that proper

electrical polarity is maintained on all equipment connected to

the JX2 and that proper building electrical codes have been fol-

lowed wherever the JX2 is being used.

To reduce opportunity for shock hazard or damage to the JX2 or

connected equipment, plug the ¼” connectors into the ampliﬁers

ﬁrst and then to the JX2. This is especially important when using

old ampliﬁers that do not have 3-prong plugs as the possibility

exists to touch the chassis ground with the connector plug tip

when the plug is inserted into the jack.

Cautions for ampliﬁers with ungrounded 2-prong A/C cords:

Before connecting any input to an ungrounded ampliﬁer, power

the amp up and listen to the residual hum. If the amp has a

two-position ground polarity reverse switch, set the switch in the

position that produces the least residual hum from the speakers.

If there is no polarity switch, reverse the A/C plug at the outlet to

ﬁnd the least residual hum.

To ensure an ungrounded ampliﬁer does not present a

shock hazard: Test for voltage potential by connecting a

voltmeter between the ampliﬁer chassis and the JX2 chassis. If

voltage is present, reverse the ampliﬁer’s A/C supply polarity and

test again.

Note that due to this potential problem, damage to the JX2 or

other connected equipment caused by improper A/C polarity is

not covered by warranty.

Radial Engineering Switchbone Owner’s Manual

True to the Music True to the Music