The following troubleshooting tips can help diagnose and correct most concerns with the A5+ Classic. We have attempted to make this list as comprehensive as possible, so some of these may not apply to your issue, but please go through each tip.

If the power indicator on the A5+ front panel is not illuminated, then try these tips:

1. Verify that the AC power cord is connected to the speaker rear panel and to a working AC power outlet.
2. Check that the speaker’s power switch is in the ON position.
3. Check that the rear panel voltage selector matches the operating voltage in your country or region.
4. If there is still no power, check the fuse in the rear panel.  If the fuse is blown and needs to be replaced it is important to replace with same fuse type and value.

If the front panel indicator light is on but you are experiencing an audio-related or other issue, try these tips:

1. Power-cycle the speakers by switching them off and back on using the power switch on the rear panel.
2. Be sure the speakers are not in MUTE or SLEEP mode (if so, the front panel indicator light will be flashing).
3. Check that the cables from your audio sources to the speaker are properly connected.  Confirm by unplugging the audio cables and then reconnecting.  Try using as many different inputs and input sources as possible to see if the problem follows.
4. Check speaker wire connections from the left (powered) speaker to the right (passive) speaker.  Confirm by removing the speaker wire from on each speaker and reconnecting.  Also check speaker wire polarity by verifying that the wires are going to same terminals on both speakers.
5. Verify that your audio input source components or devices are all powered on and the volume levels are turned up.
6. If using a computer, verify that the audio output balance setting is centered for the OS and all apps.
7. Make sure the speakers are not too close to a wall or other obstruction, which could limit bass output.
8. Decrease the volume level of the audio input source and increase the volume of the speakers.
9. If you are using a wireless adapter, preamp, or external DAC with these speakers, remove these (temporarily) and connect the audio source directly to the speakers.
10. If your input source has its own EQ or other sound settings, make sure they are all temporarily turned off.
11. Also try moving the speakers to a different location to see if something is causing interference in the current location.  Something as simple as a wireless internet router, cordless or mobile phone, or halogen lamp near the speakers can all cause interference.

A5+ troubleshooting tips - remote control

Remote control is not working or remote range is reduced.

1. Make sure nothing is blocking the remote control receiver, which is in the left powered speaker.
2. Check the remote battery to be sure it is installed correctly.
3. Replace the battery with another CR2025 battery

The following troubleshooting tips can help diagnose and correct most concerns with the A2+ Classic. We have attempted to make this list as comprehensive as possible, so some of these may not apply to your issue, but please go through each tip.

If the power indicator on the A2+ external power supply unit is not illuminated, try these tips:

1. Make sure the AC power cord is connected to the power supply unit and to a working AC power outlet.
2. Check that the cable at the other end of the power supply is correctly connected to the rear panel of the left speaker.

If the power supply light is on but you are experiencing an audio-related issue, try these tips:

1. Verify that the volume/power control on the rear panel is not turned all the way down or powered off (we recommend setting the volume to at least the 10 o’clock position).
2. Check that the volume level of your audio source components or devices is not set to minimum volume or powered off.
3. Check speaker wire connections from the left (powered) speaker to the right (passive) speaker. Confirm this by removing the speaker wire from on each speaker and reconnecting.  Also check the speaker wire polarity by verifying that the wires are going to same terminals on both speakers.
4. Check that the cables from your audio sources to the speakers are properly connected. Confirm this by unplugging the audio cables and then reconnecting.
5. Decrease the volume of the input audio source and increase the volume of the speakers.
6. Try using different audio input sources and/or devices to see if the problem follows.
7. Try swapping your left and right speaker via the RCA left and right inputs to see if the issue remains in the same channel or follows the speaker.
8. If you are using a computer with your A2+, make sure the volume is up on your media players, internet radio, master control, device volume, etc. and the balance control is centered.
9. If your input source has its own EQ, please make sure the low end is at a moderate level, as having too much bass can cause distortion.
10. If you are using a wireless adapter, preamp, or external DAC with these speakers, remove them (temporarily) and connect the audio input source directly to the speakers.
11. Move your speakers to a different location to see if something is causing interference in the current setup.  Something as simple as a wireless internet router, cordless or mobile phone, or halogen lamp near the speakers can cause interference.

A2+ troubleshooting tips - internal USB digital-to-analog converter

Try these tips if your computer is not recognizing the speaker through your computer’s USB input or the sound through USB isn’t functioning correctly.

If you are using a Windows computer, uninstall the USB driver from your computer.  Then disconnect the USB cable to remove the A2+ from your computer and plug it back in to allow the USB driver to re-install automatically.  You can find complete instructions from Microsoft on how to reinstall a plug-and-play device under Windows here.

If you are using a Mac, try a NVRAM/PRAM reset.  This resets the system configurations for some audio and video related items and can many times help clear up problems related to audio. See Apple’s support page for information on how to do this.