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Old 06-07-2011, 09:00 AM
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Default JL Audio M600/6 amp....

Anyone using this amp? I just got my entire system from Jim at BOE which consists of two 10" JL woofers and two pairs of the JL M770-CCS.

I also got the Fusion IP600 and the JL M600/6 amp.

This is the same system I had in my last boat with exception of the amp. Before I had an automotive Rockford Fosgate 400/4 (400 watt) amp which was massive compared to this amp.

The system sounded fantastic.

But looking at this JL amp it is tiny in size. Anyone have any experience with this particular amp installed in a similar system? I would hate to install it and be disappointed in the output. On the box they do say "amazing power in a compact unit"

Maybe I'm just used to 600 watt amps looking like surf boards. I guess the technology has improved?
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Old 06-07-2011, 09:14 AM
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Chris - I have this amp installed in my 22 center console and it sounds amazing. Here's my setup:

- 1 JL audio 600/6
- 1 10" JL subwoofer
- 2 6.5" JL coaxals
- 2 7" JL coaxals
- Currently using a Pioneer car stereo with only 1 pair of RCA outputs which i had to use Y splitters on for the coaxals

I'm very impressed with the amp but I have additional plans of using this for 3 pairs of coaxals and then aquiring another JL amp to power 2 subwoofers.

My vote is to go for it!
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Old 06-07-2011, 11:17 AM
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Its is a banging amp...The Alpine PDX's are also very compact compared to competing amps. I just upgraded to one from my pioneer and I can fit 2 amps where 1 was before...
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Old 06-07-2011, 01:58 PM
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Great amp but y didn't u go with the 700/5 left a lot of potential power on the table
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Old 06-07-2011, 02:53 PM
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On my last system with the same speakers and radio it really sounded great with a 400 watt amp.

I figured jumping up another 200 watts was more than enough power. Plus having 6 channels works perfect with the amount of speakers I have.
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Old 06-07-2011, 03:04 PM
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6 channel amp can safely run up to 12 4 ohm speakers. the JL amps are damn near bulletproof and sound great. JL speakers are awesome as well. I think the pricing is a bit high, but you really get what you're paying for...
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Old 06-07-2011, 03:57 PM
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U have 4 speakers and 2 subs. The subs should be on a mono block amp or channel. If each sub is only getting 75 watts or whatever that amp is rms they will suck and be way underpowered. If anything it should be bridged on channel 5 and 6 but u can't bridge and run at 2 ohms....so get the 700/5. 4 main speaker channels and 1 mono block channel that will run at 2 ohms.
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Old 06-07-2011, 06:06 PM
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It's a class D amp and a kicker. I have a 500/1 powering a pair of 10 inch subs and it makes your eye jiggle.

You'll be pushing the same amount of power to the subs as you will be to the 7.7's. IMO they need twice as much power pushing them....but it will sound good either way.
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Old 06-07-2011, 07:47 PM
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Chris,
I got the same speaker set up you did from Jim/BOE but I got the 900/5 amp and it's awesome sounding. I can't comment on the amp you got since I have not run it, but I don't think I would be happy with less than I get from the JL 900/5.
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Old 06-08-2011, 05:50 AM
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I'll give the amp a try and see what happens. Worst case scenario is I will need to change it out.

But I can always run the left 7.7's on channel one and right 7.7's on channel two then use channel 3&4 bridged and channel 5&6 bridged for the two subs. This way the subs will get twice the power.

We will see.....
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Old 06-08-2011, 07:53 AM
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..............or,

Buy another set of 7.7's for channels 5+6. Then buy something like the 500/1 to power the 2 subs!!!
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Old 06-08-2011, 09:36 AM
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Hmmm....trying to keep the system simple with just one amp.
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Old 06-08-2011, 09:58 AM
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Quote:
Originally Posted by ScarabChris View Post
Hmmm....trying to keep the system simple with just one amp.
Just a thought.
A throughly pumping stereo helps the girls forget anyone else is around watching what they are doing. Mix that with a couple drinks and well....you know!!!!
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Old 06-08-2011, 10:01 AM
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Then go 700/5 or 900/5
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Old 06-08-2011, 10:31 AM
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Chris - I have watched you for years get stuff that does not work out because you wanted to make a decision on your own.Remember the jensen?

Just get the 900/5 and be done with it. Based on the way you boat, it is the clear choice that is correct here...
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Old 06-08-2011, 03:00 PM
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The 900/5 is also a class D amp. Can someone tell me what this means?
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Old 06-08-2011, 03:28 PM
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class D amps run cooler and produce more power than their A/B counter parts, basically they are more efficient. While they loose little to no power when the voltage drops, class A/B amps loose alot of their power as voltage drops (EX: from 14.4v running to 12.5v sitting to 11.0v after sitting awhile)
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Old 06-08-2011, 03:32 PM
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Note the specs from the 2 amps......the 600/6 lists power ratings at 14.4 vs 12.5 volts with a 15 watt drop whereas the 900/5 has one power rating regardless of voltage (showing the same power at 11v-14.4v)


M600/6 600W 3/4/5/6 Channel Amplifier Specifications:
M600/6
Rated Power 14.4 V Stereo: 75W RMS x 6 @ 4 ohms
100W RMS x 6 @ 2 ohms
Rated Power 14.4 V Bridged : 150W RMS x 3 @ 8 ohms
200W RMS x 3 @ 4 ohms
Rated Power 12.5 V Stereo: 60W RMS x 6 @ 4 ohms
90W RMS x 6 @ 2 ohms
Rated Power 12.5 V Bridged: 120W RMS x 3 @ 8 ohms
180W RMS x 3 @ 4 ohms
THD at Rated Power: <1% THD, 20 Hz - 20 kHz




HD900/5 Five-Channel Class D Marine System Amplifier Specifications:
MHD900/5
Rated Power: 750 W RMS @ 1.5 ohm - 4 ohm (11V-14.5V)
Rated Power Front Channels: 100W RMS x 2 @ 4Ω (11V - 14.5V)
75W RMS x 2 @ 1.5-3Ω (11V - 14.5V)
Rated Power Rear Channels: 100W RMS x 2 @ 4Ω (11V - 14.5V)
75W RMS x 2 @ 1.5-3Ω (11V - 14.5V)
Rated Power Subwoofer Channel: 500W RMS x 1 @ 1.5-4Ω (11V - 14.5V)
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Old 06-08-2011, 03:37 PM
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BTW: My 500/1 is a class D amp and although that suggests its a 1 channel amp it does provide outputs for 2 subs...putting a true 250w to each sub. I suspect the sub channel of the 900/5 works the same way.
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Old 06-08-2011, 03:47 PM
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Well you guys convinced me. Jim from BOE is going to exchange the 600 for the 900 for me.
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