![]() for a series config (8 ohm) then connect the two +ve terminals together and then connect the amp to the -ve terminals of the speakers. If your speakers are set up like mine, then you'll need to connect them out of phase (i.e for a parallel config connect the +ve of one to the -ve of the other and the -ve of one to the +ve of the other). You want the drivers moving in opposite directions, mabybe in your 2ohm (parallel config) you had them moving in the same direction and therefore cancelling each other out?. I suspect what has happened in your case is that you have the polarity of one of the drivers wrong. If it works for you though, and your amp isn't getting too hot, then you'll probably be ok. (isn't there always!!) Most, but not all amps can drive a 2ohm impedance, because 2 ohms does take more current and therefore power some amplifiers will just cut out, especially at high volumes. Since power is V 2 / R reducing the impedance from 8 to 2 ohms will increase the power 4fold. After a speaker is designed, it is measured. Connecting the same two 4 ohm speakers in parallel will give a 2 ohm impedance. In the world of speaker design, designers use speaker Q, (also known as Qts or Total Q) to define how well damped a speaker is. You see that connecting two 4ohm speakers in series will give you an 8 ohm impedance. What you've described is not normally the case.
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