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Old 04-07-2014, 11:53 PM
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JL 900/5 Amp question

Does anyone have any experience with running this amp? I am considering running the four 100w channels to each in boat speaker and using the 500w sub channel to power two 10" IB JL's. I typically like to run my subs off of their own amp but can get a good deal on this particular amp. The boat has an existing 200/2 JL amp that I was going to just run to the two tower speakers.

Any thoughts?
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Old 04-08-2014, 10:16 AM
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Bueller....Bueller....
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Old 04-08-2014, 10:30 AM
ol1970 ol1970 is offline
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My friend does exactly that in his X15...made a HUGE difference. Do it!
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Old 04-08-2014, 10:36 AM
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Budmanv24 has a 900/5 in his boat. Pretty loud! Is upgrading his system to 2 900/5s to double the wattage.
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Old 04-08-2014, 10:59 AM
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Any issues with running two 10" JL's off of the one channel?
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Old 04-08-2014, 11:32 AM
ol1970 ol1970 is offline
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I'd say you are getting very limited return by adding just one JL 10" infinite baffle sub. I'd suggest either just doing the 900/5 and being content, or open a whole can of worms and go crazy like me : 200 watts to each of the (10) JL 7.7 speakers, and a 13W7 (or equivalent you prefer) properly powered...1200/1 in my case. But then be aware you are opening up battery/alternator/charger issues. It is a slippery slope!
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Old 04-08-2014, 11:56 AM
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Boat has zero subs currently so I am actually picking up two subs vs none.
I have gone the "full boat" way in the past and loved it but isn't practical for me anymore. I would love to hear yours though ^^^
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Old 04-08-2014, 12:06 PM
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David Analog David Analog is offline
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The sub section of that amplifier perfectly hits the sweet spot for two 'M' series IB 10" subs. The 900/5 has two power supplies so it is like two (sub and satellite) amplifiers in one chassis. It's also strictly regulated so it is more robust than unregulated amplifiers boasting the same power. The only thing you need to avoid with this particular amplifier is running a different impedance load on the front and rear channels.

Just make sure that both subs are tightly collected and oriented exactly the same versus in two different locations because the later is usually a sure way to kill the benefits of a second subwoofer.
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Old 04-08-2014, 12:31 PM
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Thanks David. My install of the subs will look exactly like the below pic at the drives footwell so they should be very similar. I just planned on direct wiring each in boat speaker to each of the 4 channels on the amp so should be no issue with impedance. Hoping this will wake everything up!

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Old 04-08-2014, 01:28 PM
ol1970 ol1970 is offline
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What you are doing there in the photo would not be bad and an economical way to up the bass without going nuts. Honestly the base in the boat from the factory is pretty darn good as is. I was worried you were going to place one behind the seat and then one in the footwell...that is not a great idea to do.
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