Originally Posted By: mlord
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The pre-amp for this antenna appears to be a little rectangular box integrated within the antenna "box" itself. As such, it does not appear to be removable at all. There is an extra "in-line" gizmo which serves as a DC power injection module, to supply remote power to the antenna.

... it is possible to remove the power-injector from the setup, but the pre-amp itself seems to be hardwired into the antenna (that little rectangular box) and probably cannot be removed.

Some pre-amps still pass signal when not powered, though at a significant loss. Others cease to pass any meaningful amount of signal unless powered.

It is possible they have provided mis-information (aka. "they lied") in the description though, and the entire pre-amp circuitry could instead reside within the "power injection" module. Dunno.

Cheers
The product description mentions a Smart Switch with Long Range and Short Range modes. Unclear if that is a way of adjusting the amplifier gain or perhaps bypassing the amplifier built into the antenna unit, but it would seem to explain why it works with and without.