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The Antennas Direct DB8 is a direct competitor to the CM-4228.
The CPA-19 is not restricted to use with the CS series antennas, it is an excellent amplifier, capable of fine performance in wide range of applications. The CPA-19 is capable of handling strong signals. The CM-7777 is a weak signal amplifier, much easier to overload. Consider the Winegard HDP-269 and the Channel Master CM-7778 as substitutes/competitors to the CPA-19. The CPA-19 would be my choice.
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