Im working on my next project. Adding a new sound with all Alpine marine components.

Head unit - iDA-X100M
Speakers 4 pr - SPR-M700 7"
Subs 2 - SWR-M100 10"

I am still trying to figure what amps I want.
Do I get 3 amps?
1 amp for subs -PDX-1.600M
2 amps for speakers - PDX-4.100M

or do I go with 2 amps? - PDX-5M and split the subs? What is the right way? 1 amp for each - 2 pr of speakers and 1 sub.

I still have to work on the battery configuration. Any suggestions or advice is appreciated.

I would go with two amps pushing everything. I am not an alpine fan but not bad stuff. Using two will make a more compact set up and easier sys to drive with your head unit. Plus you are using tens so it will sound good. Use a Deka group 31 batt they will let you playtime setup for at least 6 hours. One will be enough and can be purchased at batt plus store for 100 bucks. Don't buy a optima or other styles like that trust me they wont last.

Is the Deka a deep cycle battery?

A guy I know has the same setup. It sound great! He is using 3 amps. He also has 2 optimas/blue just for stereo. Seems like a over kill. But I want to do it right.

I have used optimas forever in competition stereos and they are the bomb... Have 2 on my current boat setup and it will play all day on the beach. Went 2 days without ever even running and fired right up. As far as amps I would use 2. One for subs and one for highs and mids. IMO 3 would be overkill

How do you go about having more speakers than channels? I will have (2) 10" subs, that is one amp. Then I will have (8) 7" 2 way speakers.

Two speakers each channel =2ohm load. Make sure the amps are rated for 2 ohms. I'm running all my stuff off a DEI 2205 5channel amp.

Each channel of the amp is 100 watts and each speaker is 50 watts norm. The speakers peak at 150 watts. So will the amp be enough to push the speakers to the ability?

Are the components seperate tweeter/woofer style? or are they "all in one"? If the tweeters are seperate I would mount them higher up on the gunnel than the woofers, but, if they are combined, then you are pretty limited.

I have heard good things about the PDX amps, the only negative I have heard is that they run HOT, so, make sure they have lots of air around them, or better yet, a fan or two. Alpine also make a 4.150, dont know if its marine rated or not, but, you could use 2 of them to drive all the components you have, and then some.

JL Audio make some REAL nice marine stuff too, if you dont have your heart set on Alpine

Michael

Those Amps are two ohm stable so double up 2 pairs of 7in on each amp and bridge the subs on the other channel. So 2 pairs and one sub per amp.
Not to get into a battery arguement but the DEKA are the way tpo go. You will need only one to run the system not two, and will play at full volume for hours. And I mean pushing in excess of 3000 watts. They are deep cycle with 250 reserve cap and 150amp/hours. Plus they will fit in a standard Batt box no need for a special one. Plus they are 100 bucks not 300x2. I am not saying optimas are bad they are just not as good.
Your amps will actually push your speakers better with that load as well. You will be able to leave the gains down and that in theory will keep temps down of the amps. Make sure they are well ventilated or have a fan to help if they get hot.

[QUOTE=
JL Audio make some REAL nice marine stuff too, if you dont have your heart set on Alpine

Michael[/QUOTE]

I run all JL....stuff sounds sick