Can you use a sub channel for a speaker?

[R055]

Hey guys, another audio question for me. I now have all my speakers and here is the set up I'm planning to use with them. 2x50rms inside the boat(replaces the stock speakers). 2x65rms on tower facing wakeboard(kicker bullet speakers). 1x150rms (kicker kmt6) on tower facing forward towards bow.

I'm looking at this amp
https://www.amazon.com/Rockford-P10...&qid=1481991166&sr=8-5&keywords=5+channel+amp
Will the 5th channel that's made for a sub work for my tower forward facing speaker?
Thanks

 

[H20Rat]

Not on that amp. You can't bypass the low pass filter on the sub channel, it goes to 250hz max. I know I've had a couple throughout the years that can, but most 5 channel amps have a built in LPF that can't be completely disabled on the sub channel.

Are you really sure you want a forward facing speaker? You can get much better sound from speakers in the boat. Spread the sound out and run them at lower volume, it will sound better than a single overdriven speaker. If it were me, I'd get another pair of whatever speakers you have in the boat and mount them somewhere in the bow. Run them at 2 ohm, and then run the tower speakers off channel 3/4. You could also just keep the interior speakers at 4 ohm and use a second amp for the tower speakers, which is nice because you can toggle the amp off if nobody is behind.

 

[R055]

Not on that amp. You can't bypass the low pass filter on the sub channel, it goes to 250hz max. I know I've had a couple throughout the years that can, but most 5 channel amps have a built in LPF that can't be completely disabled on the sub channel.

Are you really sure you want a forward facing speaker? You can get much better sound from speakers in the boat. Spread the sound out and run them at lower volume, it will sound better than a single overdriven speaker. If it were me, I'd get another pair of whatever speakers you have in the boat and mount them somewhere in the bow. Run them at 2 ohm, and then run the tower speakers off channel 3/4. You could also just keep the interior speakers at 4 ohm and use a second amp for the tower speakers, which is nice because you can toggle the amp off if nobody is behind.

My boat is only 19.5 feet so can't really put speakers in the bow without it being a distraction/annoying/dangerous.

 

[R055]

New question. If I buy a 4 channel amp and each channel is 75rms. My tower has 2 kicker bullets at 65rms each and 1 kicker dual speaker at 150rms. Can I use the first 2 channels for the 2 bullets and then combine channel 3 and channel 4 for the 150rms speaker?

If this works I can get a head unit with stock higher output for the 2 speakers inside the boat and amp for the tower speakers.