Owner`s manual

Guitar Amplifier GVT5–110
9
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Important Information About Tubes (continued):
Survival Tips for Tube Amplifiers:
To prolong tube life, observe the following tips and recommendations:
• Matchtheimpedanceofthespeakercabinet(s)totheamplifier.Improperimpedance 
matching will contribute to early tube degradation and may cause premature tube failure.
• Makesurethespeaker(s)areproperlyconnectedpriortoturningontheamplifier.
• Allowsufficienttimefortheamplifiertoproperlycooldownpriortomovingit.Aproperly
cooled amplifier prolongs tube life due to the internal components being less susceptible
to the damage caused by vibration.
• Allowtheamplifiertowarmuptoroomtemperaturebeforeturningiton.Theheat 
generated by the tube elements can crack a cold glass housing.
• Replacetheoutputtube(s)beforetheperformancedegradesorthetubesfailcompletely.
Replace the tube(s) at least once per year or as often as every 4 to 6 months if you play
long and hard every day.
• Ifthelocatingnotchonthebaseofapowertubebreaksoff,replacethetube.This 
significantly reduces the risk of damaging the amplifier by incorrectly inserting the tube.
• Protecttheamplifierfromdustandmoisture.Ifliquidgetsintotheamplifierproper,orif
the amplifier is dropped or otherwise mechanically abused, have it checked out at an
authorized service center before using it.
• Propermaintenanceandcleaningincombinationwithroutinecheckupsbyanauthorized 
service center will ensure the best performance and longest life from the amplifier.
CAUTION: Tube replacement should be performed only by qualified service
personnel who are familiar with the dangers of hazardous voltages that are
typically present in tube circuitry.