Page 2 of 2 FirstFirst 12
Results 11 to 19 of 19

Thread: Speaker and Amplifier Matching

  1. #11
    Maximum Bitrate Sidewalksalvage's Avatar
    Join Date
    Mar 2006
    Location
    NJ/RI
    Posts
    826
    Quote Originally Posted by scott_fx View Post
    i just picked up a w7 myself
    REALLY thats awsome man... thats exactly the sub i was thinking of too...
    Brown 2010

  2. #12
    Maximum Bitrate Sidewalksalvage's Avatar
    Join Date
    Mar 2006
    Location
    NJ/RI
    Posts
    826
    Okay so I now know plenty about subs...

    But what about component systems?
    If i have clean signal 150w RMS it wont hurt speakers rated for 75W RMS

    I really dont want to damage the speakers especially if im going to invest a pretty penny on them....

    What would be too much for them
    For example JL's Evolution XR653-CS They are rated at 70W RMS if i put four sets on a Alpine PDX 4.150 (which puts out 150RMS per channel) would I be at risk for blowing the set?

    Granted I never put my volume maxed out but i dont want to be in a situation where i have to fear putting the volume too high

    btw thanks scott!
    Brown 2010

  3. #13
    Maximum Bitrate Sidewalksalvage's Avatar
    Join Date
    Mar 2006
    Location
    NJ/RI
    Posts
    826

    Exclamation The Verdict?

    Alright Well tons of research later.....

    Ive been checking out page after page on amplifier and speaker power matching and now to share with all:

    There are 2 main ways to damage your speaker.

    1. Underpower
    2. Overpower

    Seems basic and obvious but what you may not know is that underpowering is probably worse than overpowering.

    If you play a speaker overpower, unless its like 1000W to a 25W speaker, overpowering isnt the most critical problem. A speaker can usually handle twice its rated power coming from the amp (ie a 75W speaker will operate well with a 150W amp) Its actually suggested to run a setup as such because overpowering is less of a problem than underpowering. Even that 1000W amp can drive that 25W speaker forever as long as you dont pump the volume over 2% (and the speaker will even operate at peak efficency).
    If you run the speaker to long at too high a wattage what will happen is mechanical falure the cone will bust out of the speaker.

    Underpowering is much worse. If you have an amp that puts out say 50W per channel and you hook a 200W speaker to it and pump up the volume what will happen is the amp will be pushing itself past its limit and sound clipping will occur. A clean signal moves fluidly in a occilating manner. When you have clipping its like an on off switch (take a light for example if you dim it on and off over and over it will be fine but flick it on and off to its extremes over and over and the thing will bust) the same is true for a speaker when you send it distorted clipped signal the cone will pop in and out the wiring will likely melt or fry and the cone can potentially rip. Not good at all.

    This is why the recommendation is for greater watts from the amp than the speaker can handle. This way whe the speaker trys to pull its maximum power to reproduce your loud volume the amp will have plenty of headroom to provide you with clean sound. Granted go to high and the distortion will start on the speaker end and you will have crap sound.

    Now remember something else here when i say watts i mean RMS or continuous power (RMS actually means Root Mean Square but you dont really need to know that) 'Peak' Power is this imaginary number that are given just to make the amps look good. Its a "potential" number that for over less than a moment the amp can put out. Also remember that IMPEDENCE (or resistance) IS VERY IMPORTANT!!!!! I cant stress that more.

    Im not going into huge detail about how to put your speakers in series and parallel to change impedence well save that for another day. But you want to match your impedence of the speakers at or above what the amp is rated for! If you go below the amp will fry (think of it as short circuiting the amp) and if you put to much your speakers will not get as much power (if you double the impedence, the wattage is cut in half i.e. inverse porportional)

    I think thats all.......

    so in answer to my question if i put 75W speakers on a 150W amp ill be perfect.... i just better not put the volume at max....at least not for too long

    **** thats a long post.
    Brown 2010

  4. #14
    MySQL Error scott_fx's Avatar
    Join Date
    Dec 2004
    Location
    Los Angeles Ca
    Posts
    3,995
    haha. very good. i have 300 watts going to my doors :-O you'll be fine
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  5. #15
    Variable Bitrate
    Join Date
    Nov 2005
    Location
    CT
    Posts
    316
    Looks like you did a lot of good research on your own. One thing to consider especially when overpowering your speakers is the frequency and crossover points. For example the tweeters in my car are rated 15wrms. They should have no problem with 30wrms as long as it is within there frequency range. If I were to send them a 500hz tone at 30wrms they would probably pop. But at 3000hz no prob.

    I'm just learning about this myself so if someone else can explain this better please do.

  6. #16
    Newbie SilverSquared's Avatar
    Join Date
    Aug 2006
    Posts
    39
    I never match. And I mean NEVER. LOL. I got a 2x25w amp on my Punch components, and a 2x100w amp on 3 PowerBass Xtreme 15s. Who needs a match?

    Orion 225 HCCA driving P162s Components.
    Orion 2100 HCCA driving 3-PBX 15s.

    LOL, works for me.
    CarDomain for my Silverado. Updated 2-20-07!!!
    DropJawMag pic #1 of my truck at ShowFest '06.
    DropJawMag pic #2 of my truck at ShowFest '06.
    DropJawMag pic of my truck at Scrapin The Coast '06.

  7. #17
    Maximum Bitrate Sidewalksalvage's Avatar
    Join Date
    Mar 2006
    Location
    NJ/RI
    Posts
    826
    Quote Originally Posted by blkwrx View Post
    Looks like you did a lot of good research on your own. One thing to consider especially when overpowering your speakers is the frequency and crossover points. For example the tweeters in my car are rated 15wrms. They should have no problem with 30wrms as long as it is within there frequency range. If I were to send them a 500hz tone at 30wrms they would probably pop. But at 3000hz no prob.

    I'm just learning about this myself so if someone else can explain this better please do.
    Definatly make sure you are in frequency range!!! I cant believe i didnt mention that. Make sure you use a good crossover as well if you have component coaxial speakers and they only have one imput (i.e. a mini cap possibly before the tweeter) you WILL blow the tweeters with too much power. Trust me ive done it already

    What would you like explained better? The frequency restrictions or amp matching in general? If so im happy to help clarify if i can.
    Brown 2010

  8. #18
    Variable Bitrate
    Join Date
    Nov 2005
    Location
    CT
    Posts
    316
    Quote Originally Posted by Sidewalksalvage View Post
    What would you like explained better? The frequency restrictions or amp matching in general? If so im happy to help clarify if i can.
    Nothing... Personally I understand it I just wasn't sure I did a good job of explaining it

  9. #19
    Maximum Bitrate Sidewalksalvage's Avatar
    Join Date
    Mar 2006
    Location
    NJ/RI
    Posts
    826
    OHHH okay cool. Nah you did a fine job!
    Brown 2010

Page 2 of 2 FirstFirst 12

Similar Threads

  1. 5.1 Amplifiers with Optical inputs
    By RedGTiVR6 in forum Car Audio FAQ
    Replies: 118
    Last Post: 10-21-2011, 03:02 PM
  2. 5.1 Center Channel Speaker Options
    By RedGTiVR6 in forum Car Audio FAQ
    Replies: 3
    Last Post: 05-08-2008, 05:39 AM
  3. Replies: 8
    Last Post: 02-14-2006, 06:43 PM
  4. best low wattage 4 channel amp?
    By megagoo in forum Car Audio
    Replies: 23
    Last Post: 01-02-2006, 02:07 PM
  5. My new speakers sound like crap!!
    By res940 in forum Car Audio
    Replies: 14
    Last Post: 10-28-2005, 12:31 PM

Bookmarks

Posting Permissions

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