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    Rockford Fosgate Subs/Amp Question

    New to the site, looking for some help..

    I recently purchased 2 12 inch Rockford Fosgate TI's (dual 4 ohm) and a Rockford Fosgate T1500 amp.

    When hooked up only one will work (either one) but if I do both they are so quiet can barely hear them, but with the one it shakes the neighborhood.

    I wired these like I always have in the past with my systems but never had a dual 4 ohm system. Each sub has a switch like thing on it with an arrow. It points to either 2 ohm or 8 ohm. Right now they are on 2. If I take them out and turn it to 8 will this fix the problem? Do I need to wire these any differently? right now its sub + to port + to amp + and same for negative.







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    Re: Rockford Fosgate Subs/Amp Question

    Your amp probably isn't 1 ohm stable. Switch to 8 and run them parallel to get you 4 ohms.



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    Re: Rockford Fosgate Subs/Amp Question

    the amp should be 1 ohm stable , sounds like they the subs are out of phase




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 mids,cdt es 010 tweets,es 03 Mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
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    Re: Rockford Fosgate Subs/Amp Question

    Are you talking about the T1500bd or bdcp?

    ---------- Post added at 06:14 PM ---------- Previous post was at 06:13 PM ----------

    Quote Originally Posted by mylows10 View Post
    the amp should be 1 ohm stable , sounds like they the subs are out of phase
    Dagnammit...didn't think about that. Good call.



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    Re: Rockford Fosgate Subs/Amp Question

    RMS Power Output:

    4 ohms: 500 watts x 1 channels
    2 ohms: 1000 watts x 1 channels
    1 ohm: 1500 watts x 1 channels

    1-Ohm Mono Stable

    what exactly do you mean run them parallel?




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    Re: Rockford Fosgate Subs/Amp Question

    Look at the subwoofer wiring wizard on Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers you'll see what I mean



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    Re: Rockford Fosgate Subs/Amp Question

    [QUOTE=neo_styles;8256283]Are you talking about the T1500bd or bdcp?

    ---------- Post added at 06:14 PM ---------- Previous post was at 06:13 PM ----------




    t15001bd




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    Re: Rockford Fosgate Subs/Amp Question

    both subs + to + and - to - on both voice coils and both subs ,then + wire to + input on the amp and - wire to - input on the amp should see 1 ohm




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 mids,cdt es 010 tweets,es 03 Mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
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    Re: Rockford Fosgate Subs/Amp Question

    Quote Originally Posted by mylows10 View Post
    the amp should be 1 ohm stable , sounds like they the subs are out of phase
    this......................^^^^^^^^^^^^^




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    Re: Rockford Fosgate Subs/Amp Question

    Thanks for the help. Got them wired properly, upgraded the speaker wire to 12 gauge, power and ground to 2 gauge and working B E A utifully... *thumbsup*




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    Re: Rockford Fosgate Subs/Amp Question

    Did you wire them to 1 ohm?






    REFS alot

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    Re: Rockford Fosgate Subs/Amp Question

    Yup. Turned the switch to 8 ohm on each. Each sub had only 1 + and 1 -.. wired the positives together and the negatives together and ended up with 1+ and 1- wire going to the amp.




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    Re: Rockford Fosgate Subs/Amp Question

    if you switched them to 8 ohms each then you only are getting a 4 ohm load at the amp. they need to be switched to 2 ohms each sub then wired to the amp the same way .you'll get 3 x more power




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 mids,cdt es 010 tweets,es 03 Mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
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    Re: Rockford Fosgate Subs/Amp Question

    dude, it already gives me a headache at volume of 15.. with bass at -6, treble at +6, can barely even hear the music over the bass. dont think I could handle 3x more in my 06 Mazda 3 LOL! Maybe if I was going for competition I would do it.. but for now its good enough




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    Re: Rockford Fosgate Subs/Amp Question

    booo to this op!!!



    Things to look forward to:
    (2) 10" or 12" imperium audio designs subs
    set of PHD MF 6.5" comps
    Completely seal off and deaden my doors
    aquire a 2k amp
    aquire a 2 channel amp for front stage

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