When do you need to amplify? Proper use of a pre-amplifier can do wonders for an antenna installation. However, you must be careful, because too much amplification can cause overload, resulting in no signal at all. More amplification is not always better. The sole purpose of an amplifier is to offset signal loss due to long cable runs (over 75'), splitters, multiple TVs or other factors. Click the amplifier names below to view specific information for each amplifier. Open them one at a time, or open them all to compare.