Yes you can bridge this amplifier to a 2 channel at 4 ohm per channel for 200 watts out of each channel.
The Kicker 4-channel Car amp has the Kicker logo on it.
90 watts X 4 channel output
a channel refers to the speakers or subs. for example a 2 channel amp can power 2 subs or speakers. a 4 channel will power 4.
Your 4 channel amplifier has neither a 4 ohms nor a 8 ohms output impedance. The output impedance will be smaller than 0.5 ohms. In audio we only use amplifier and loudpeaker bridging. Don't believe the myth of matching. Scroll down to related links and look at "Impedance bridging - Wikipedia".
This is an amplifier that has 4 sperate channels and can be wired in various ways. Usually you would have 1 channel per speaker so you could do 4 speakers with this. However, sometimes it is possible to join the channels together and get more power out of fewer channels - you can get anything from 2-4 channels out of a 4 channel amp.
One can purchase a 4 channel amplifier from any local music supply store as well as some local department stores. One can also purchase these from online retailers such as Amazon.
It could be a 2 channel stereo amplifier.
The ratings for the speakers will depend upon what '300 watts' means. If the amplifier develops 300 watts RMS total across 4 channels, this would indicate 75 watts RMS per channel. Speakers rated at 100 watts should suffice for this amplifier.
A mono amplifier. You need two for stereo.
One can find a four channel car amplifier from many different stores. These stores include Best Buy, Walmart, K-Mart, or any store that sells electronics.
It has 2-, 3-, or 4-channel output, easy connect with RCA patch cords.