The answer to this question will depend on your Cable Service Provider, the channels and services you receive, the strength of the incoming signal from the Cable Service provider, your internal home wiring and distribution, and the inputs available on your TVs. At minimum, you will need a Modulator, a Notch or Low-Pass filter, a 2-way Splitter, and possibly an amplifier like our DA-520A or a Distribution Amplifier like our DA-8200BID.
Please use this link, http://www.linearcorp.com/audio_video_distribution.php#systems, to visit our website for more information on our products.
Please call us at 800-421-1587, then follow the menu options to reach Technical Services and Channel Plus/Open House/Intercom products, or email us at video.audio@linearcorp.com for information specific to your system.