07162002, 05:49 AM  #1  
Wiring speakers "in series" and "in parallel?"
Quote:
Speakers that are wired in parallel are all connected to the positive and negative terminals of the amplifier. So, when two speakers are wired in parallel, you'll connect each speaker's positive lead to the amplifier's positive terminal, and you'll connect each speaker's negative lead to the amplifier's negative terminal. Be careful when wiring multiple speakers in parallel or series so that you do not exceed your amplifier's rating. To calculate the effective impedance of a number of speakers, use the following formulas: Series Connections: Z(t) = Z(1) + Z(2) + Z(3) + ... + Z(n) That is, add up all of the impedances for each speaker to get the total impedance. For example, with 3 4ohm speaker in series, the total impedance is 4 + 4 + 4 = 12 ohms. Parallel Connections: 1/Z(t) = 1/Z(1) + 1/Z(2) + 1/Z(3) + ... + 1/Z(n) That is, add up the inverse of the impedance of each speaker and invert the sum to get the total impedance. For example, with 3 4ohm speakers in parallel, the total impedance is 1 / ( 1/4 + 1/4 + 1/4) = 1 / (3/4) = 1.33 ohms. 

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