That is usually an amplifier for 5.1 surround sound signals. Just a little extra info: With 5 channels you'll have 2 for the front left and right, 2 for the rear left and right with 1 being the center channel speaker. Most often seen in home theaters with a sub woofer out but increasingly seen in cars.
It could be a 2 channel stereo amplifier.
A mono amplifier. You need two for stereo.
Yes you can bridge this amplifier to a 2 channel at 4 ohm per channel for 200 watts out of each channel.
That is usually an amplifier for 5.1 surround sound signals. Just a little extra info: With 5 channels you'll have 2 for the front left and right, 2 for the rear left and right with 1 being the center channel speaker. Most often seen in home theaters with a sub woofer out but increasingly seen in cars.
go ask a mechanic idiot
To bridge a Carver GA-250 power amplifier, connect the positive terminal of the output from one channel (e.g., the left channel) to the positive terminal of your speaker. Then, connect the negative terminal of the output from the other channel (e.g., the right channel) directly to the speaker's negative terminal. Ensure the amplifier is set to "bridge" mode, if applicable, and check the speaker's impedance to ensure it matches the amplifier's bridged output specifications. Always consult the amplifier's manual for specific instructions and safety precautions.
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The Kicker 4-channel Car amp has the Kicker logo on it.
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.
Connecting speaker leads to both right outputs, A&B, will only play the right channel of the sound (in mono) when both pairs of speakers, A and B are turned on. This won't damage the amplifier or speakers, but you won't be listening in stereo.
90 watts X 4 channel output
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".