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4 ch amp question

Old 07-14-2005, 08:10 PM
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Default 4 ch amp question

I have a clarion 4 ch amp - speaker outputs for Left and right, Front and rear. each one of these seperate channels is 80 watts per channel.

If I hook 2 sets to the front channels and 1 set to the rear (total of six speakers), and then set the fronts on an a/b swiitch - do the front set that are selected produce better quality sound than when all 4 up front are playing?

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Old 07-14-2005, 08:33 PM
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Default Re: 4 ch amp question

Glen-

I'm no stereo expert but here is my feeling if I understand your question correctly. Sounds like you have a good source of power going to the speakers, which is key. If the 4 speakers up front are of same brand and model (same timber) and they are spaced out properly it should sound "better" with all 4 playing. Should give you a fuller sound and the sound should be well balanced too. Sometimes when you just goto 2 speakers up front and they are targeted right at you, it feels like you are being blasted with sound rather than sound surrounding you. Then again depending on placement it's good to go from 4 to 2 speakers if some someone happens to be sitting right at the second set and is getting blasted.

Is there a reason you want to put an a/b switch on the fronts?

--JK
Old 07-14-2005, 08:45 PM
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Default Re: 4 ch amp question

my boat is set up so that I have 4 speakers in the back/center that keep the sound great for me in the drivers seat when at cruise speed. I also have a set in the fwd seating area for guests when we do family cruises. I guess the better way to explain it is if I turn off the for foward speakers - do I get better power quality out fo the back 4? They are all similar speakers.
Old 07-14-2005, 09:03 PM
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Default Re: 4 ch amp question

Better power quality....no. A 4 channel amp will put out the same signal/power if one set of speakers is shut off like in your case. There are tricks to getting a lot of power out of amps, run them in mono, run speakers in series, etc. For your case the power quality will be same same. It'll be nice to have the option to shut off a pair or speakers.

--JK
Old 07-14-2005, 09:56 PM
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Default Re: 4 ch amp question

It depends. First, if you have all four up front playing at once, there are two ways to wire it - if you wire them in series, 4 ohm speakers will drop it to a 2 ohm load and most likely overheat and then toast the amp.

If you put them in parallel, you wont get the same wattage out of them, but it won't both your amp at all.

As far as sound goes, make sure that you have the polarity right on all speakers - if you have teh polarity crossed on one of them, the sound will be out of phase and your ears will 'hunt' for where the sound is coming from.
Old 07-14-2005, 10:02 PM
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Default Re: 4 ch amp question

they are wired in paralell and my thinking is if I shut off the front two speakers I get better power remaining speakers as they are using the front and rear channels and better to handle bass spikes when they need it.
Old 07-18-2005, 04:54 PM
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Default Re: 4 ch amp question

Some AMPS like JL Audio are 2 ohms stable and wont FRY..... however since electricity take the least path of resistance to ground there will be an differance in power between the front and rear if running 2 ohm's front and 4 ohms rear. This will cause the amps MOSFETs to drive high on the Q point creating allot of heat... if your amp has a power level for each channel you should be able to control sound level and even out your audio system. Your amp class will have allot to do with its ability to accept this kind of configuration..

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