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  1. #11
    Join Date
    May 2018
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    Quote Originally Posted by Kelsupra View Post
    That’s ok Larry, I’m leaning towards 4 towers.
    For reference Supra uses an 800/8 to drive 4 jl8.8 towers.


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    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  2. #12
    Join Date
    Aug 2020
    Location
    Kelowna, BC
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    21

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    Wow that's a lot of power for 4 towers!
    2015 Supra SG 550

  3. #13
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
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    2,467

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    Its only 200W rms to an 8", thats a good spot. However, the M800/8 is a poor way to go IMO. 1) you end up running all 8 chnl at their minimum load, just to get that 200W from each pair of bridged chnls. 2) in order to configure this setup correctly, You have to populate all 8 inputs. The DSP MVi series is a different scenario.

    Now, before someone pops in to say "the amp works with only a single pair of RCA", yes it does, but its less then ideal. And "Supra only used a single pair of RCA" yep, and Nautique also ran this amp setup poorly. JL's own literature outlines it.

    For the money, there are 2 chnl marine amps with more wattage output that are not going to require a pile or RCA Y cables to make it right.

  4. #14
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    May 2018
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    Quote Originally Posted by MLA View Post
    Its only 200W rms to an 8", thats a good spot. However, the M800/8 is a poor way to go IMO. 1) you end up running all 8 chnl at their minimum load, just to get that 200W from each pair of bridged chnls. 2) in order to configure this setup correctly, You have to populate all 8 inputs. The DSP MVi series is a different scenario.

    Now, before someone pops in to say "the amp works with only a single pair of RCA", yes it does, but its less then ideal. And "Supra only used a single pair of RCA" yep, and Nautique also ran this amp setup poorly. JL's own literature outlines it.

    For the money, there are 2 chnl marine amps with more wattage output that are not going to require a pile or RCA Y cables to make it right.
    I am not sure why JL does this for Supra and Nautique as they are the ones designing and tuning these systems for each model boat.

    But JL is using the mvi amps now.

    Supra currently uses the following.....

    M800/8mvi for 4 8.8 towers
    M800/8mvi for 2 8.8, 2 7.7 and 2 6.5 in boats
    M1000/1mvi for 2 12” subs.

    JL personnel are supposed to custom tune each boat at Skier’s choice.


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    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  5. #15
    Join Date
    May 2018
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    4,920

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    I thought the RCA’s were for zone control.

    1) Bow
    2)dash
    3)cockpit
    4)tower
    5)sub


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    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  6. #16
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
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    2,467

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    But JL is using the mvi amps now.
    JL still offers the M-Series M800/8, as well as the new MV800/8i. Prior to the MVi series, the M-Series was used bridged into 4 chnl mode. Its important to make the distinction between the M and MV since there are two 8 chnl amps available. One is good, one is less then ideal due to how its has to be configured with RCA.

    I thought the RCA’s were for zone control.
    My post refers to the RCA inputs on the amp, not media unit's RCA output.

  7. #17
    Join Date
    Aug 2020
    Location
    Kelowna, BC
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    21

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    Guys, what do think about jl mdh600/4 to run jl tower speakers? That is the amp I'm looking at now. My old amp is the Polk Pad400.4
    2015 Supra SG 550

  8. #18
    Join Date
    Oct 2010
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    Lake Wylie NC Area
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    If you are going to drive 4 of the same speakers, the MVi MV600/2i would be my choice over the MDH600.4. The MV600/2 is easier to wire, but the trade-off is the DSP tuning is WAY more involved compared to the MDH amp.

  9. #19
    Join Date
    Aug 2020
    Location
    Kelowna, BC
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    21

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    Just had time to check out the setup as it is now. This is what I have:

    1) Polk PAD4000.4 - one of the wires says "top" so assuming its powering the Roswell towers
    2) Polk PAD4000.4 - running Polk towers/polk bows?
    3) Polk PAD5000.5 - cabins/Polk sub

    Is this correct?

    Do I have enough to power JL m6 6.5 speakers in cabin and bow?
    2015 Supra SG 550

  10. #20
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
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    2,467

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    I have not run across a Supra Polk setup that had two (2) PAD40004 amps, but just one, and then a 50005.

    The 5 chnl 50005 will power all the in-boat speakers.............. main cabin and bow.

    A single 40004 will power 4 coaxial tower pods or can be made into a large 2 chnl amp and power a single pair of large, high power handling HLCD tower speakers.

    To four speakers, the polk 40004 is going to deliver 125W rms to each speakers. Volume wise, thats no different then the Jl MHD600/4's 150W rms x 4.

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