Lifting The Ground - Radial Engineering HEADLIGHT Manual

lIFTING THE GROUNd

When more than one amp is connected, you can sometimes encounter excessive noise, commonly
referred to as a ground loop. The best way to prevent hum and buzz in your system is to connect
all of your amps and pedals into a single power bar. This helps prevent problems due to improper
household electrical wiring from causing problems. You do, however have to keep in mind that most
electrical power circuits are limited in the available current. Exceeding the current demand may cause
the breaker to blow. Driving three or four 100 watt amps at the same time along with a bunch of pedals
may exceed the limit– so you may need to connect to two circuits if playing loud.
To help eliminate noise, the Headlight is equipped with isolation transformers and ground lift switches.
Output-1 is the default amp and should always be connected to an amplifier that is equipped with a
proper U-ground. The other 3 outputs are transformer isolated to block stray DC voltage and are very
effective at reducing noise. These 3 outputs are also equipped with ground lift switches that lift the
audio ground without affecting the safety of the electrical ground. Never cut or disconnect the electri-
cal safety ground from your amplifier as this is there to protect you.
IMPORTANT SAFETY NOTICE: As you are the sole user of the Headlight, you are entirely responsible for using ampli-
fiers, power supplies and effects that are electrically approved by your local authority and are safe for use. If you are
unsure of the status of your equipment, please contact the manufacturer or dealer for details. As Radial Engineering Ltd is
unable to control what is being connected to the Headlight, you agree to take full responsibility for its safe use and agree
that Radial Engineering Ltd. along with its staff and directors shall not be held responsible in any way for damages of
any kind other than those clearly detailed in the Radial Warranty. Should you for any reason feel uncomfortable with the
above statement, you should return the Headlight, before use, to the dealer in the original packaging for full credit within
7 days of purchase.
Radial Engineering Ltd.
8
Headlight™ User Guide