Installation Guide English 25
Technical Information
pro.Bose.com
Troubleshooting
Problem What to do
No power • Turn on power. Green LED on front panel will be visible when power is on.
• Make sure the power cord is plugged in.
• Try a dierent AC outlet that is working with another piece of equipment.
Power is on, but no
sound
• Make sure the input source is turned on.
• Verify that there is an input signal from the source.
• Check the cable connections from the source to the amplifier.
• Make sure the OUTPUT ATTENUATION controls are not turned down to mute.
• If a CC-1 zone controller is connected to the ControlCenter connector on the rear panel, make sure
the volume control on the zone controller is turned up.
• If a contact closure is connected to the MUTE connector on the rear panel, check the switch to
ensure the mute function has not been triggered.
• Make sure that loudspeaker taps are set correctly.
• Check that the amplifier has adequate ventilation. Improper ventilation could cause the amplifier
to go into thermal protection mode and no audio will be heard.
• Ensure that the output wiring is correct. A short circuit will cause the amplifier to go into
protection mode and no audio will be heard.
Power is on, but
sound is low
• Verify that the audio input source output is turned up to a nominal level.
• Check the cable connections from the source to the amplifier.
• Make sure the OUTPUT ATTENUATION controls are not turned down too low.
• If a CC-1 zone controller is connected to the ControlCenter connector on the rear panel, make sure
the volume control on the user interface is turned up.
• Make sure that loudspeaker taps are set correctly.
Sound is distorted • Verify that the SIGNAL LED on the front-panel is not red, indicating clipping. If it is red, reduce
the source output level, or increase the amplifier sensitivity to 12 dBu.
• If the input source signal is clean, verify that the loudspeakers are not overdriven or damaged.
Check the loudspeaker tap setting.
Unnatural sound • Verify that the proper EQ preset is selected for the loudspeakers being used.
Additional Information
Refer to the owner’s guide (online at pro.Bose.com) for more information about your product (including accessories and
replacement parts). To request a printed copy, use the phone numbers provided.
Limited Warranty
Your product is covered by a limited warranty. Visit pro.Bose.com for warranty details.
The warranty information provided with this product does not apply in Australian and New Zealand. See our website at
www.bose.com/au/warranty or www.bose.com/nz/warranty for details of the Australian and New Zealand warranty.
Date of Manufacture
The eighth digit in the serial number indicates the year of manufacture; “6” is 2006 or 2016.
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