Amplifier recommnedations
 

Starting to put together a system for the boat, so far have mtx 7.7's, looking for a decent 5 channel amp to push 4 of the mtx's and a couple 10" subs. any ideas? I do have an old hifonix zues sitting on the shelf but one of the channles has a bit of noise, fixable easily??

Alpine+DP??

JL audio marine only in a boat. You won't be disappointed. Have had mine for 5 years, still sounds like the day I put it in and we push it hard.

Look up wet sounds. Best boat marine products period

JL Audio MHD or HD amps. Marine if in an area that will get wet. Sweet thing about the HD series is they will push their rms rating whether the engine is running and batteries are at 14v or when the boat is off and batteries are down to 12.5 v

I agree with JL or Wetsounds but you should get separate amps for speakers and subs, the combos are always a compromise.

The downside of this is the current rises and rises as the voltage drops, but they are great amps aside from that. Batteries don't stay at 12.5 V for long when you are cranking the tunes.

I have a pair of MHD's pushing 1350 watts total and can run 7-8 hours on 2 standard batteries at max volume.

I would recommend a amp that is efficient. The JL marine amps are designed to not drain the battery. The output goes down with lower battery voltage. As mentioned above the other amps will keep drawing more and more as the voltage drops. Yes you have more power out of the amps but not for long.

I would also look at digital amps. class D amps will be much more efficient then class A/B designs.

MP

I have a Memphis 1100 class D for my subs, (not marine version) kept in cabin. Batteries last alot longer Been great for around 7-8 years pounding 4 subs at 1 ohm. It did start poping the fuses at the end of this season. Im going to send it back to memphis, heard they have a flat rate to repair. Heard the JL are great too.

In the Donzi I have 12 JL M770 (7.7" components) and 4 JL 10" marine subs. I went with 2 900/5 amps for 8 speakers and the subs and a 600/4 for the remaining 4 speakers. It sounds great and is very loud but I do regret not going with separate amps for the speakers/ subs. While my configuration is better on the batteries (I have 2 group 31 Odyssey marine batteries dedicated to the stereo). Looking back, I should have went with 3 600/4 for the speakers and 2 600/4 for the subs. Really really wish JL would come out with a marine HD 6 or 8 channel amp that pushes 150w rms per channel. Would only make sense as boats typically have quite a few speakers.

Im not getting too carried away. The boats only 22 x 7 there is not a lot of room for multiple amps etcs and I don't need to hear it 3 states over. Just need to have decent tunes when cruising.

A 5 channel keeps things simple...Alpine makes a nice one, I have one that came in my boat and it is a very clean amp. A digital amp for your subs would be more efficient but if you have 2 or more batteries does it matter?

Massive

Alpine PDX V9. 4x100 and 1 x500 watts of clean power
Its a class D digital amp.

JL audio 9005!!!! Ftw!!

Memphis marine has been great for me this season so far

What are the RMS ratings on your speakers and subs?

If it's not going to get "wet" then the Alpine PDX Amps are hard to beat, they are compact and reasonable to buy, especially used. JL makes AWESOME stuff, but, it's pricey.

I guess it's all relative, if you have 300-400K in a boat then dropping 10-20K on a stereo is small change, but, in a small boat like mine it would be a bit excessive.