Is this compatible with spectrum

I assume you mean Spectrum TV? It should be compatible with them yes. Keep in mind a 4 way splitter will take the incoming signal strength and chop it into 4th's so each TV will get a lower signal to them. In most cases that should still work but you may need an amplifier and if you do amp the strongest signal before the splitter. Take care Ron at ron.kipper@idealindustries.com