AVS Forum Special Member
Join Date: Jan 2000
Location: Salt Lake City, UT, USA
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I would not use both an antenna preamp and a distribution amp together, unless you have some good test equipment and the skills to use it.
A preamp will probably give you plenty of gain (most have far more gain than a typical distribution amp), so you could use standard splitters after that.
A preamp will likely add noise and cause distortion (due to overload) when it feeds another amp.
Most distribution amps are just a combination of a 15 dB amplifier and as many as 4 or 8 outputs from a built-in splitter. So, a one-output DA would give you the same signal boost as a 15 dB preamp, but with a bit more noise than a typical preamp....so, maybe about as good as a 13 dB preamp. A four-output DA is the same 15 dB amp, with a 4-way splitter built-in, so it has a total gain of about 7 dB to each output. Degrade it slightly for the noise figure of a DA, it's like a 5 or 6 dB preamp.
Ken English, Sr. Engineer, KSL-TV.
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