Sentry Wireless Headphones Troubleshooting

By Daniel Barrows

Sentry Wireless Dynamic Headphones allow you to enjoy the audio output from your computer, stereo or MP3 player without being tethered to the device by cables. While the headphones are simple to install, you may encounter issues during operation that affect the device's sound quality or ability to function.

The Basics

Sometimes, the problem can be as simple as a missed button press or an improperly set dial. Confirm that you have pressed the “ON” button on both the transmitter and the headphones and that the power light on each is illuminated; if you see no such light, this indicates that the batteries may be dead. The battery compartment on the headphones is located on the outside of one of the earpieces (you may wish to use a small flathead screwdriver to aid you in removing the compartment cover). On the transmitter, the battery compartment is located on the side of the device and the cover slides right off. The headphones require two AAA batteries, while the transmitter uses a single 9V battery. Once you are certain that both components are receiving power, confirm that the volume settings on your audio device are at an audible level. If you have access to an alternate set of speakers or headphones, plug them into the audio device's output jacks and check if they work. This can help you determine whether the problem lies with the Sentry headphones or your audio device.


Begin by tracing the cable leading from the transmitter to the connected audio device. If you have a loose connection point, it can affect the quality of sound output. Make sure that the cables are plugged into the right ports; look for ports labeled “AUDIO OUT” or use the packaged adapters to connect your transmitter via a headphone jack. If you are using the optional AC adapter, confirm that it's properly connected to the transmitter and plugged into a powered electrical outlet.


In order to work properly, the transmitter's antenna must be fully extended and within 100 feet of the headphones. If you experience significant sound distortion or static, try moving and reorienting the transmitter to see if that alleviates the problem. Minimize the number of physical obstructions between the transmitter and the headphones and try to keep the transmitter away from other electrical devices, as they can cause interference. If all else fails, plug the transmitter AC adapter into a different electrical outlet; problems experienced on one circuit may not carry over to another.