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JL Audio M770 x 4 w/ M400/4 Amp

Old 06-03-2016, 03:58 PM
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Default JL Audio M770 x 4 w/ M400/4 Amp

So I am replacing my Fusion 7021 speakers with JL Audio's. I have a pair of M770-TCW coming that will go in a very tight space that does not have much open air behind it. I was thinking of putting a pair of M770-CCX in my center console where there is a bunch of open air space behind.

I have a couple of questions regarding the above....

1) First is having 4 M770 too much for one M400/4 amp?

2) Will the above selection of speakers sound well together (provided question 1 is acceptable)?

3) Should I use something other than 7" speakers?


Thank you in advance.
Old 06-03-2016, 04:53 PM
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I think you will be happier with a Wet Sounds HT4
Old 06-03-2016, 05:24 PM
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Thank you for that information; however I already have the JL Audio M400/4; I don't want to purchase a different AMP. If you'd like to exchange it I'd entertain that idea.

The questions I posed were pertaining to the JL Audio speakers paired with the JL amp.
Old 06-03-2016, 05:45 PM
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Originally Posted by InternationalMarineBrian View Post
I think you will be happier with a Wet Sounds HT4
I disagree with you. To me, the JLs have a warmer and cleaner sound overall. Have been on boats with both.
Old 06-03-2016, 05:56 PM
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Originally Posted by jkthree View Post
I disagree with you. To me, the JLs have a warmer and cleaner sound overall. Have been on boats with both.
The HT4 is an amp not speaker's. M770 JL sound great on the Wet Sounds amp. The WS has headroom which the M400 would lack when pushing the M770s
Old 06-03-2016, 05:57 PM
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Originally Posted by AS350Pilot View Post
Thank you for that information; however I already have the JL Audio M400/4; I don't want to purchase a different AMP. If you'd like to exchange it I'd entertain that idea.

The questions I posed were pertaining to the JL Audio speakers paired with the JL amp.
I'm sorry I didn't see that you already had an amp in your original post
Old 06-03-2016, 06:04 PM
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Originally Posted by InternationalMarineBrian View Post
I'm sorry I didn't see that you already had an amp in your original post
No problem.
Old 06-03-2016, 10:00 PM
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While you won't be exploring the limits of those 7.7's it will definitely sound better then a 6.5 set up.
I don't think there is a negative in what your are doing and if later you add more power then your good to go.
Old 06-04-2016, 02:54 AM
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Originally Posted by Dockholiday74 View Post
While you won't be exploring the limits of those 7.7's it will definitely sound better then a 6.5 set up.
I don't think there is a negative in what your are doing and if later you add more power then your good to go.
Thank you for the response, it is greatly appreciated.
Old 06-04-2016, 03:01 AM
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I run 4 M7.7's with a M400/4, it sounds great. Plenty loud, even while running.
Old 06-04-2016, 04:43 AM
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Originally Posted by tdk72 View Post
I run 4 M7.7's with a M400/4, it sounds great. Plenty loud, even while running.
Exact same here. Great sound, and it cuts through the engine sound.
Old 06-04-2016, 06:25 AM
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Talk about headroom!!! Check out this independent review of the JL Audio XD500/3 amplifier from PAS Mag. http://pasmag.com/car-audio/reports/...lifier-review-
As tested, the JL Audio amplifier exceeded its 500 watt 14.4V rating by 35%, producing 673 total watts. It also equaled it's 14.4V rating with a much lower 12.6V supply. And, it maintained 98% of its CEA 1 kHz rating across the entire audio bandwidth. Now that's headroom.
I also like that the JL Audio XD and M series Class D analog switching amplifiers use a very high speed switching frequency & many times above the audio bandwidth, has a cast heat sink, has a sealed chassis and sealed control panel, has all terminals along one side, provides a port for a remote level control, has a truly studio grade front end with very precise crossover selections, to name a few.
So the OP made a good choice IMO.
Old 06-04-2016, 05:37 PM
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Thanks everyone for the posts. I am going with 4 7.7s then. Can't wait to get it cranking.
Old 06-04-2016, 10:41 PM
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Always love David analog responses as they are technical and not subjective. Bottom line in my experience with JL amps ( mostly MHD)
1. Proper power supply (gauge) both pos/neg
2. Proper cooling with fans
3. Metered output for speakers being driven (multi-meter and test tone)
4. Head unit set for approx 75% output (volume limit)

Props to BradV for educating me and trouble shooting my issues with MHD failures.

End result..... Stereo that sounds clean to limit, zero distortion and long term reliability.

👍👍👍👍

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