Boulder 508 - User Manual

Questions and Answers

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Peter WhiteJul 27, 2025
How to troubleshoot no power indication on Boulder Amplifier 508?
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  Julia GriffinJul 28, 2025
  If your Boulder Amplifier 508 shows no power indication, first, ensure the power switch is in the ON position. Then, verify the power cord is securely connected to an AC mains outlet. Check the 508's fuse and replace it if necessary. Also, examine your home circuit breaker and reset it if it has tripped. If the issue persists, have the line voltage and power cable tested. As a last resort, it might be a defective 508, return it to the dealer for service.
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Melissa GuzmanAug 4, 2025
Why is the red LED indicator on my Boulder Amplifier 508?
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  Benjamin RiveraAug 4, 2025
  If your Boulder Amplifier 508 shows a red LED indicator, it could be due to several reasons. First, ensure that the 508 is not muted by pressing the Mute button. If that's not the case, the phono preamplifier might be in the process of booting up; wait until this process completes. If the red LED persists, it might indicate a defective power supply, in which case you should return the 508 to the dealer for service.
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Meghan WilsonAug 11, 2025
What to do if there is hum through loudspeakers with Boulder 508?
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  Jessica StevensAug 12, 2025
  If you have hum through loudspeakers with your Boulder Amplifier 508, it might be due to grounding issues. Check for a missing ground connection and install a ground wire if necessary. Alternatively, if there's a duplicate ground connection, use only one ground wire to the turntable or utilize the ground in a balanced cable. Also, the 508 or turntable might be too close to another component's power supply; try moving them away.
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Rebecca MilesAug 19, 2025
What to do if Boulder 508 Amplifier has white power indication, but no sound?
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  Sherri FullerAug 19, 2025
  If your Boulder Amplifier has a white power indication but no sound, the issue might stem from the turntable signal. Check the turntable cables and connections to ensure a signal is being sent from at least one channel. Also, check the cables and connections to the preamplifier to ensure a signal is being sent out.