Customers are frequently asking us for advice on the best mounting location for a radar detector. Unfortunately, there is not an easy answer. Choices usually come down to either mounting the detector high on the windshield or visor or low on the windshield or dashboard, and there are advantages and disadvantages to both.
Positioning a radar detector high on a windshield, such as by the rear-view mirror or clipped to a visor gives you better protection against police radar. A detector that is mounted high will catch some radar signals sooner than with a lower mounting. This is particularly true in more hilly terrain, or when your vehicle is travelling up a hill and a police officer is targeting traffic from the other side. A high mounted detector will encounter the radar signal sooner, providing you with more time to adjust your speed.
With a high mounting, however, you risk missing a laser alert. At 1000 feet, the light from a police laser gun is only around 2 feet wide, and this light has to hit your radar detector before you will get an alert. Since the officer is aiming the laser at a front license plate or a headlight, there is a good chance that a high mounted detector this narrow beam.
A radar detector mounted low on the windshield or attached directly to the dash (with Velcro or a dash pad) will provide the best all-around solution. You will lose a little in radar range, but will gain a lot in the ability to detect laser. Of course, a radar detector alone is not enough to guarantee protection against police laser, so if laser is used in your area be sure that you have a passive solution like Laser Veil or a laser jammer.
We recommend you mount high if laser is not used in your area, or if you have an active laser jammer installed.
We recommend you mount low if laser is used in your area and you are using only a passive laser defense product (or no specific laser defense product).