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    Under powered?

    So I have an old Alpine MRP-F300. (50 watts RMS x 4 @ 4 ohms or 75 RMS x 4 @ 2 ohms)

    I am looking to buy:

    A pair of Infinity Kappa 62.9I 6.5"s. (75 RMS @ 2 ohms each)

    A pair of Infinity Kappa 693.9I 6x9"s. (110 RMS @ 2 ohms each)

    Would I be under powering the 6x9"s even with proper gains or is this setup okay?







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    Re: Under powered?

    You should be fine, Alpine makes good equipment.



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    Re: Under powered?

    That being said I should be fine with 6.5"s rated at 110 RMS too correct? Like all four speakers rated at 110 RMS on the same 75 RMS x 4 amp?




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    Re: Under powered?

    You will only run into issues when you overpower a speaker (or send it a very dirty signal) so yes, you'll be fine.



    01 Lincoln Continental - Mary

    XFL 12" on a VFL150.1, 4.5 cubes net @27Hz
    Powerware 150ah monster, SHCA 1/0 & 8ga
    Pioneer D Series 6.5" and 6x8" on a VFL150.4

    References: mylows10, 2000LaDe , VWGolfMKVI, Garcia915, UnderFire, joeybutts
    Quote Originally Posted by Beatin' View Post
    You HAVE to look.

    If after 5 wipes you're still getting mega shit on the paper, it's shower time.

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    Re: Under powered?

    yes you would be sending them less than recommended pwr, don't go for 6x9's n e ways they ****, get a sub and some splits for the front




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    Re: Under powered?

    Are 6x9"s really that bad? Thats what fits in the rear deck of my car 6.5s seem too small for back there. I was considering going with some components (if thats what you mean by splits?) for up front; even tho I already have a pair of tweets with their own amp I was planning on using. Got any recommendations that would accommodate my amp nicely? I do not want a sub in this car for right now at least.




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    Re: Under powered?

    Quote Originally Posted by kjearl View Post
    Are 6x9"s really that bad? Thats what fits in the rear deck of my car 6.5s seem too small for back there. I was considering going with some components (if thats what you mean by splits?) for up front; even tho I already have a pair of tweets with their own amp I was planning on using. Got any recommendations that would accommodate my amp nicely? I do not want a sub in this car for right now at least.
    6x9's are good speakers, just not for bass. You'd be much better off throwing a 10" sub in a sealed box if you're looking to add a little bass.



    01 Lincoln Continental - Mary

    XFL 12" on a VFL150.1, 4.5 cubes net @27Hz
    Powerware 150ah monster, SHCA 1/0 & 8ga
    Pioneer D Series 6.5" and 6x8" on a VFL150.4

    References: mylows10, 2000LaDe , VWGolfMKVI, Garcia915, UnderFire, joeybutts
    Quote Originally Posted by Beatin' View Post
    You HAVE to look.

    If after 5 wipes you're still getting mega shit on the paper, it's shower time.

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    Re: Under powered?

    I have a Memphis 16MCD-1000 (1100 RMS @ 1 ohm) that I am saving for maybe an SA-10. Just trying to upgrade the speakers in the car right now and do the sub later down the line if ever.




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    Re: Under powered?

    As long as you don't crank your amps thinking that they won't blow your speakers, you'll be fine. You can always upgrade.



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    Re: Under powered?

    Quote Originally Posted by jrdnhsnbrg View Post
    6x9's are good speakers, just not for bass. You'd be much better off throwing a 10" sub in a sealed box if you're looking to add a little bass.
    Should I consider 6.5's for the rear? Ditch 6x9s all together?




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    Would this setup work?

    Okay after some research I think I'm gonna go with:

    Front.
    Image Dynamics CTX-6.5cs components (100 RMS @ 4 ohms each) and bridge an Alpine MRP-F300 to give them 150 RMS each @ 4 ohms.

    Rear.
    Image Dynamics CTX-69 6x9's (100 RMS @ 4 ohms each) and power them with an old school Alpine 3523 I have lying around puts out ~40 RMS x 2 @ 4 ohms (from the 80s some people say it puts out more, I don"t know)

    I might add a sub later, I just wanna upgrade speakers now and get the best sound without buying any more amps.

    Would I be okay powering this setup like this with proper gains? Would I have too much front stage? I don't like the idea of completely ditching rear speakers which is what I found a lot of people suggesting. My car is huge and I don't think front speakers alone will fill the cabin with sound.




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    Re: Under powered?

    If your not going to do a sub then definately go for 6x9's they will get you a lower frequency response than 6.5's. If your planning on a somewhat simple system I would consider something more like your original post, 2 ohm speakers all around. powerbass L2 lineup is all 2 ohm stuff as well. Contemplate sound deadening while you do the speakers if your not going to be adding a sub.




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    Re: Under powered?

    i am sorry to interrupt your discussion but i hope to receive your advice for my gear as i am now facing similar problem with you

    mine include Alpine MRX-F35 with 55W x 4 at 4Ohm, but i chose Morel Tempo 6 which capacity is rather high at 90Rms (maximum 120Rms).

    I am just afraid the difference capacity between amp and speaker. I intend to make the bridge in my amp for 170W x 2, but then i cannot use this amp for the rear speaker.

    Someone says that the capacity of speaker and amp sometimes differents and 55w still can work well with my Morel even it is 90W.

    pls give me your advices

    tks




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    Re: Under powered?

    if your going to put a sub in later on, i'd suggest 6.5"coax speakers for the rear. I've found 6x9's and a sub in the same system makes it sound muddy or sloppy...




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    Re: Under powered?

    Quote Originally Posted by Hoangvoila View Post
    i am sorry to interrupt your discussion but i hope to receive your advice for my gear as i am now facing similar problem with you

    mine include Alpine MRX-F35 with 55W x 4 at 4Ohm, but i chose Morel Tempo 6 which capacity is rather high at 90Rms (maximum 120Rms).

    I am just afraid the difference capacity between amp and speaker. I intend to make the bridge in my amp for 170W x 2, but then i cannot use this amp for the rear speaker.

    Someone says that the capacity of speaker and amp sometimes differents and 55w still can work well with my Morel even it is 90W.


    give me your advices

    tks
    it is better to over power a speaker than to underpower one, whats the peak on your morels? do they have a max rms rating?




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