good setup?

Gnomez
Gnomez Posts: 15
edited April 2005 in Car Subwoofer Talk
i have 2 polk mm124's with jvc CS-HX6945, and a jvc KS-AX7700 amp. Thanks.
Post edited by Gnomez on
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Those subs need 400-500 watts RMS to make em work right. How much does that amp push?
    polkaudio sound quality competitor since 2005
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    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • neomagus00
    neomagus00 Posts: 3,899
    edited March 2005
    note: RMS values, not peak.
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • Gnomez
    Gnomez Posts: 15
    edited March 2005
    it pushes 900 watts but it can be bridged
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Is that 900 peak?

    Is it a mono amp running 900 RMS at 2 ohms mono?

    I didnt think JVC made a 900 mono amp.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • neomagus00
    neomagus00 Posts: 3,899
    edited March 2005
    yes, i looked it up, and that is peak.

    gnomez: i assume you're running those 4-ways off of the headunit. that amp isn't nearly powerful enough to drive those subs. it makes 150 W x 2 Ch. @ 4 Ohms. Even if you assume it has vast headroom and is 2-ohm stable in its standard configuration, that's only 600 W x 1 Ch. @ 4 Ohms. Those subs want 500 apiece, and they'd be getting about 150 each at most, any way you wire it. a new amp is definately in order, if possible. if you're already set up, it'll work, but not close to full potential.

    2 useful notes: this is how to set the gains for your amp, and those subs need to be broken in very slowly.
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Well I guess my lazy **** couldve looked up the amp but....Im lazy! :p

    If that amp is putting out 150x2 then its WAY underpowering those subs.

    The good news is youre in no danger of hurting your subs cause even in clipping it will never send out enough watts to hurt those subs.

    The bad news is that it will never send out enough watts to make those subs sound as good as they can either.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • Gnomez
    Gnomez Posts: 15
    edited March 2005
    what about the polk c300.2?
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Not enough grunt for 2 2124's. The C500.1 would be a much better choice. It puts out a little over 600 watts and that would be 300 to each 2124 and that would be just fine.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • Gnomez
    Gnomez Posts: 15
    edited March 2005
    ii dont have the 2124's i have the mm124's so will the c500.1 still do er?
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Oops, my bad.

    The MM124's handle 500 watts so the 300.2 would definitley be too small.

    The 500.1 would be ok for them. It would be 300 per sub which could be a little low but we heard a lot of complaints of the MM124's blowing when powered with 500 watts so actually the 500.1 may not be a bad choice.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • neomagus00
    neomagus00 Posts: 3,899
    edited March 2005
    well, as we know, amps are often underrated, so a '500 W' amp could easily push 600 W, which WILL blow a sub, if it's accurately rated at 500 W. Just a thought.

    Although, I don't know how you can blow a sub... wouldn't the awful distortion warn you something's up before the coil actually burns?
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    The 500.1 IS very underrated. It put out over 600 watts in a Carsound test. That would be 300 to each MM124 which are 500 watt subs and so it would be a little on the low side.

    How can you blow subs? Ask Cody.....6 times! :p
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • exalted512
    exalted512 Posts: 10,735
    edited March 2005
    play nice;)
    i think i have number 7 and 8 sold for $215 shipped.
    hopefully...
    considering each sub was $270 + $20 for each grill im getting royally screwed. but since polk cut the price to $200 with the box and the grill i didnt do too bad...
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • Gnomez
    Gnomez Posts: 15
    edited March 2005
    so the c500.1 will do the job? and can i bridge it so i can get more power out of it?
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  • MacLeod
    MacLeod Posts: 14,358
    edited March 2005
    Its a mono amp which means it only has one channel which means you cant bridge it. Youd get a half channel.

    If you hook up a single 4 ohm voice coil, youll get a 4 ohms load. If you hook up 2 4 ohms voice coilc youll get a 2 ohm load and the most power.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • Gnomez
    Gnomez Posts: 15
    edited April 2005
    i think im going to go for the rockford fosgate T10001bd amp. will that be enough power?
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  • MacLeod
    MacLeod Posts: 14,358
    edited April 2005
    That will be plenty of power. The new Power amps by RF are F'ing badass amps.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • Gnomez
    Gnomez Posts: 15
    edited April 2005
    would the kenwood kac8101d amp work for 2 mm124's?
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  • MacLeod
    MacLeod Posts: 14,358
    edited April 2005
    If its an 800 watt amp thatll run 400x2 at 2 ohms then yes it would.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • Joelsbass
    Joelsbass Posts: 637
    edited April 2005
    I can't help but wonder... and maybe Thom, Kim, or Josh can help out on this, but are the subs blowing more from thermal overload or are they bottoming out?
    MacLeod: I guess youre lucky Polk has such lax hiring standards.

    Josh: Damn skippy!
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  • MacLeod
    MacLeod Posts: 14,358
    edited April 2005
    I would guess over extension. Havent most of the complaints been of the leads coming off and such? These arent SPL subs and dont have a great deal of excursion, so if this would be my guess.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • audiobliss
    audiobliss Posts: 12,518
    edited April 2005
    Originally posted by Joelsbass
    I can't help but wonder... and maybe Thom, Kim, or Josh can help out on this, but are the subs blowing more from thermal overload or are they bottoming out?

    I would also like to know this for a fact.
    George Grand wrote: »
    Jstas wrote: »
    Simple question. If you had a cool million bucks, what would you do with it?
    Wonder WTF happened to the rest of my money.
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