Closed Thread
Results 1 to 6 of 6

Reload Thread: who knows rms math?

  1. #1
    TDot's Avatar
    TDot is offline Member



    Join Date
    Oct 2012
    Location
    Bronx
    Posts
    148
    Post Thanks / Like
    Mentioned
    0 Post(s)

    who knows rms math?

    from what i understand rms has a lot to do with the freq range, so if the speaker's bottom end is currently 60Hz, how much more rms. can I get if I cut the speaker off at 200Hz? ...roughly. or is it not that simple?







  2. #2
    goingdef's Avatar
    goingdef is offline CarAudio.com Veteran



    Join Date
    Jan 2008
    Location
    Norfolk VA
    Age
    33
    Posts
    2,827
    Post Thanks / Like
    Mentioned
    11 Post(s)

    Re: who knows rms math?

    It's not that simple and it's ok to slightly overpower a sub/speaker as long as the power is clean.



    electrical: Optima yellow top, big 3 in stinger 1/0g
    HU: JVC AVX-77 touch screen
    Front stage: RE XXX 6.5" comps
    front stage amp: Rockford T600.2
    subs: 2 Rockford T1 12's,
    sub amp: Rockford T1500.1BDCP
    Enclosure: center port(designed&built by JayDubb757)

  3. #3
    maylar's Avatar
    maylar is offline Electrical Weenie



    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,372
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: who knows rms math?

    Unfortunately there are no standards for speaker power ratings. Usually it's a thermal limit on the voice coil, not the mechanical limit at the lowest stated frequency. Some manufacturers actually spec at some low freq (like "XX Watts hipassed at 150 Hz) but most don't say. You'll be able to give them more at 200 than at 60 Hz but how much more depends on a lot of variables.



    dave
    ----------
    1999 Buick Park Ave Ultra
    Head Unit: JVC KWHDR720
    EQ: Audiocontrol EQL
    Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
    Sub Stage: Boston G3 10", 0.5 cu ft sealed
    Amp: PPI Phantom 900.4
    Rear Fill: Boston SE953 6X9's

  4. Thanks trumpet thanked for this post
  5. #4
    TDot's Avatar
    TDot is offline Member

    Threadstarter


    Join Date
    Oct 2012
    Location
    Bronx
    Posts
    148
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: who knows rms math?

    Ok, I understand. If you believe I can get at least another 10-15wrms out of it, that will be good enough.

    Next question...I hope I'm clear on this. I had/have the Focal 165 ca1 rated 60wrms. I went ahead and got the hertz hsk 165 rated 125wrms because I wanted louder. The tweeters on the Focal's are 15wrms. I don't understand exactly how that works...if I pour 60wrms worth of voltage into the speakers only 15 gets distributed to the tweeter...respectfully. The reason this is a concern or a curiosity, is because I want to put the focal tweeters back in...but I want to pour 100wrms into the speakers do to the hertz woofers I'm leaving in. Can I do this?




  6. #5
    Vincer77's Avatar
    Vincer77 is offline Member



    Join Date
    Feb 2013
    Location
    Near Nashville, TN
    Posts
    58
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: who knows rms math?

    Why do you want to mix the focal tweeters with the hertz woofers?




  7. #6
    maylar's Avatar
    maylar is offline Electrical Weenie



    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,372
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: who knows rms math?

    Quote Originally Posted by TDot View Post
    Ok, I understand. If you believe I can get at least another 10-15wrms out of it, that will be good enough.

    Next question...I hope I'm clear on this. I had/have the Focal 165 ca1 rated 60wrms. I went ahead and got the hertz hsk 165 rated 125wrms because I wanted louder. The tweeters on the Focal's are 15wrms. I don't understand exactly how that works...if I pour 60wrms worth of voltage into the speakers only 15 gets distributed to the tweeter...respectfully. The reason this is a concern or a curiosity, is because I want to put the focal tweeters back in...but I want to pour 100wrms into the speakers do to the hertz woofers I'm leaving in. Can I do this?
    If you use the crossover that the tweeters were designed for you'll be fine. Component tweeters are often much higher than 4 ohms and draw less power than the mids with the same voltage.



    dave
    ----------
    1999 Buick Park Ave Ultra
    Head Unit: JVC KWHDR720
    EQ: Audiocontrol EQL
    Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
    Sub Stage: Boston G3 10", 0.5 cu ft sealed
    Amp: PPI Phantom 900.4
    Rear Fill: Boston SE953 6X9's

Closed Thread

Similar Threads

  1. Lanzar Amp Vibe Series. Who knows about them!?!
    By gator4thehaters in forum General Discussion
    Replies: 10
    Last Post: 04-07-2005, 04:15 PM
  2. HELP! Anyone who knows! please
    By Wonderbread in forum Subwoofers
    Replies: 2
    Last Post: 04-02-2002, 07:18 PM
  3. Replies: 13
    Last Post: 03-25-2002, 07:20 PM
  4. need to talk to some 1 whos know alot about auto charging systems
    By Bangin-Contour in forum General Discussion
    Replies: 1
    Last Post: 02-27-2002, 02:43 PM
  5. Who knows the direct line!!!!!
    By quoiry in forum General Discussion
    Replies: 2
    Last Post: 12-23-2001, 06:25 PM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum