Can i double up a 4 channel receiver to 2 speakers?

Question

i have a marine stereo with 4x45 watts, can i put two speakers and double the power to 2x90 watts?

Answer 1

yes, bridge them by using one negative from one side  and one positive from another side. the best would be to tie them together and use one positive and one negative...

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Answer 2

if you do as the previous poster says your on your way to frying that expencive unit. the answer is no. if you need more power buy a small 200 watt amp. also no hu makes 45-55 watts per channel. thats peak and most units only build about 17-20 watt perchannel. which is no where near what folks think they are buying. sorry to ruin your day but your unit wont make 180 watts :( sorry