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English - 19
Care and Maintenance
Problem What to do
Excessive Noise or System
Hum
• When connecting a microphone to the F1 Model 812 Loudspeaker, make sure the INPUT 1,
SIGNAL INPUT switch is set to MIC.
• Check to make sure that all system connections are secure. Lines that are not completely
connected could create noise.
• If using a mixing console, external source or receiving input from the F1 Subwoofer, make sure
the INPUT 1 SIGNAL INPUT switch on the F1 Model 812 Loudspeaker is set to LINE.
• For best results, use balanced (XLR) connections on the system inputs.
• Keep all signal-carrying cables away from AC power cords.
• Light dimmers can cause hum in loudspeaker systems. To avoid this, plug the system into a
circuit that is not controlling lights or dimmer packs.
• Plug the audio system components into power outlets that share a common ground.
• Check cables at mixing console inputs by muting channels. If the hum goes away, replace the
cable at that mixing console channel.
LED Indicators
The following table describes LED behavior on both the F1 Model 812 Loudspeaker and F1 Subwoofer.
Type Location Color Behavior Indication Required Action
Front LED (Power) Front Grille Blue Steady state Loudspeaker is on None
Blue Pulsing Limiter is active, amplifier
protection engaged
Reduce volume or
source input level
SIGNAL/CLIP INPUT 1/2 Green (nominal) Flicker/Steady state Input signal present Adjust to desired level
Red Flicker/Steady state Input signal too high Reduce volume or
source input level
POWER/FAULT Rear panel Blue Steady state Loudspeaker is on None
Red Steady state Amplifier thermal shutdown
active
Turn loudspeaker off
LIMIT Rear panel Amber Pulsing/Steady state Limiter is active, amplifier
protection engaged
Reduce volume or
source input level
Limited Warranty and Registration
Your product is covered by a limited warranty. Visit pro.Bose.com for warranty details.
Register your products online at www.Bose.com/register or call (877) 335-2673. Failure to do so will not affect your
warranty rights.
Accessories
A variety of wall/ceiling brackets, carry bags and covers are available for these products. Contact Bose to place an
order. See the contact information inside the rear cover of this guide.
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