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ok.

I still would like to use 2 of the channels to bridge for a sub which leaves me 2 channels for 8 ohm speakers. I will see how it sounds parallel vs individual wiring.

it sounds like your best bet would be just to bridge it into 2 channels and run just the stereo speakers....you can probably adjust the gain a little higher to make up for some lost volume

[quote="gguymon"]Thanks guys, I dont actually need stereo as I will listening from the wakeboard, 60 to 70 feet out,(the speakers will be on a tower) I am just wanting to hear it. So what I am hearing is that if I run them in parallel it wont increase the wattage that these speakers see (and boost the output level) in spite of lowering the impedance??[/quote]

You are correct, the amplifier should produce approximately twice as much power at 4 ohms versus 8, but you would be using the bridged channel. Instead of 100 x 2 you would be putting out 200 x 1, that would be split b/t the 2 speakers, hence the same amount of power.

There are some products available that you can wire to your amp that will make it appear to be a lower impedence level. Sorry, I don't know what they are called off-hand.

yea you do kinda need stereo or you will only be recieving half the information through your speakers...

Thanks guys, I dont actually need stereo as I will listening from the wakeboard, 60 to 70 feet out,(the speakers will be on a tower) I am just wanting to hear it. So what I am hearing is that if I run them in parallel it wont increase the wattage that these speakers see (and boost the output level) in spite of lowering the impedance??

[quote="smoker"]huh? if you run the stereo speakers off of one bridged channel you will lose your stereo seperation. i would leave the front two channels alone and run the 8 ohm speakers in stereo and bridge the rear two to run a sub.... this will give you the best sound out of your given setup....[/quote]

Very true, the 8 ohm stereo would provide the same wattage per speaker as 4 ohm mono, and you would retain the stereo separation. Good call Smoker :thumbsup

huh? if you run the stereo speakers off of one bridged channel you will lose your stereo seperation. i would leave the front two channels alone and run the 8 ohm speakers in stereo and bridge the rear two to run a sub.... this will give you the best sound out of your given setup....

[quote="gguymon"]I have a pair of speakers I am using in my boat that are 8 ohm (300 watt max) Evid 6.2's, I have a an MB Quartz 4200 amp that does 100 x 4 at 4 ohms. Should I run the speakers in parrallel to get the amp to see a 4 ohm load and minimize work on the amp and or should I bridge the amp down to 2 channels? Ideally I would like to run a sub and the tower speakers off of this singe amp. Im a bit of a newbie so please help and be gentle[/quote]

I think almost everyone is gentle on here :bigwink:

The amp will not work harder at 8 ohms rather than 4 if that is what you meant, actually it will be easier on it. Lowering the impedence will make it work harder.

If the amp is bridgeable I would do what you suggested and run the speakers in parallel at 4 ohms off one bridged channel, and then run a sub off the other bridged channel. You will only be able to give your speakers 100 watt's total (50 each) given their impedence, but that should be pretty good on a boat I'm guessing :)

I'm not sure whether it is bad for the amp to have the two bridged channels working at different impedence levels, maybe someone else can chime in on that.