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True to the Music
Radial Engineering Headbone Owner’s Manual
10
from electrical shock. Most amplifiers have been subjected to safety tests
from authorities like UL or CSA. Amplifiers that have passed these tests
are safe to use with your Headbone. If you intend to use the Headbone
with amps that only have 2-prong AC plugs, such as old vintage amps,
you are doing so at your own risk. Please consult a qualified technician
if you are not sure how to establish a safety ground connection.
Safe Mode™ Operation
One of the really smart features in the Headbone is a function called Safe-
Mode. Should the Headbone’s DC power supply be disconnected, the
system will ‘default’ to Safe Mode, whereby AMP-1’s input and output will
automatically connect to the speaker cabinet. This simple, yet extremely
important safety feature, will ensure that the active guitar amp always
“sees” a load and that the standby amp is muted.
Slingshot Remote
The Slingshot feature allows you to position the Headbone adjacent to
the guitar amplifier setup and remotely control it from a distant footswitch.
With Slingshot you can avoid a mess of spaghetti by keeping the cables
between the Headbone, amps, and speaker short. This also improves
amplifier efficiency and reduces system noise.
The Headbone’s Slingshot Remote is a simple contact closure that al-
lows a standard ‘latching’ footswitch to remotely toggle the Headbone’s
status from amp-1 to amp-2. Most standard ¼” mono-style footswitches
will work. The Headbone may also be used with Slingshot equipped
pedals such as the Radial Loopbone. Other pedal-switching devices or
MIDI controllers that are equipped with a contact closure output will also
be able to toggle the Headbone.
Remote Footswitch Schematic
Use this drawing for making your own remote footswitch.
Use a SPST push-on/push-off type footswitch. If you wish, an optional
LED can be included in the circuit. Any standard size ( T-1 or T-1 3/4 )
red LED with forward voltage between 1.6 & 2.2 volts (current = 20ma)
will work. The LED will light when AMP-2 is active. Connect the switch
to the Slingshot Remote input on the Headbone with a two conductor
cable. Connecting a remote footswitch to the Headbone will disable the
onboard footswitch. If you are unsure of these requirements, please refer
to a qualified electronic technician.