Self installed about 3 weeks ago, HSI Performance package with SB6121, setup is this:
Tap---(600 ft drop)---->2-way splitter|
Tap to modem is about 650 feet.
Nearest Comcast amp on street to modem about 1200 feet.
My speeds have been consistent, but signals have fluctuated at times, going as low a -16 on downstream and +44 on upstream.
I've thought about putting it on the amp, but if it ain't broke don't fix it, right?
Was in the DSL camp for years. I'm new to cable internet, should I be worried about signal problems in the winter?