CX360.4 4 channel amplifier. Any opinions on the the CX360.4? I can upgrade the woofers to 4 ohm. What would happen to 2 ohm upper door speakers?
How many channels does an amp need to power all the speakers? 10 speakers in a business CD SAV, right?

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'06 X5 3.0i - bought @143,123 miles (12/26/20)