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    CDT HD-62's

    Rated 175RMS.

    I have an amplifier, the Precision Power PCX4125.

    Here are my options:

    1. Run the amplifier in two-channel mode. This will supply 500wRMS x 2 at 4ohms. The component set will be running passive.

    2. Run the amplifier in four-channel mode. This will supply 125wRMS x 4 at 4ohms. The component set will be running active.

    let me know what you think I should do.
    Last edited by GCAdidas13; 08-04-2005 at 01:29 AM.







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    Re: CDT HD-62's

    your amp does 500 watts x 4? that's a hell of an amp batman. do you mean 50 x 4? 500 watts seems a little too much.




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    Re: CDT HD-62's

    fixed. 125x4at4




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    Re: CDT HD-62's

    ****!


    I say try them at 125 watts first, then if that's not enough power bridge it and set it for 175 with a dmm, and if that's not enough go up to 200



    Caraudio.com - Where the average member couldn't wire a SPST toggle if they had to.


    More proof.
    Quote Originally Posted by Andrew_as View Post
    I need a program or something that will help me find mounting depth without having to build box and such...
    No, Andy, I'm sure the context is fine.

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    Re: CDT HD-62's

    i would run it stereo off the front 2 channels for 125 watts. 500 is a little too much imo and even if they could handle that, that seems like a lot of wattage in your front stage. if your front stage is properly setup you shouldn't need a lot of watts imo.




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    Re: CDT HD-62's

    i think if i bridge it, i will have a hell of a time trying to keep the volume at a reasonable level. like how much does it take to be like "i really like this song pump it" and turn it up 3 notches higher than it should be at and break the thermal limits of the hd-62 midrange?

    oh and keep in mind that these components will only see >200hz because i have kodas for lower than that.




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    Re: CDT HD-62's

    Quote Originally Posted by GCAdidas13
    i think if i bridge it, i will have a hell of a time trying to keep the volume at a reasonable level. like how much does it take to be like "i really like this song pump it" and turn it up 3 notches higher than it should be at and break the thermal limits of the hd-62 midrange?

    oh and keep in mind that these components will only see >200hz because i have kodas for lower than that.

    you just have to know the limits of your speakers. if you bridge it i would afvice turning the gain all the way down. should still get loud enough without sending too much juice to destroy your speakers, providing you are careful with the volume control.




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    Re: CDT HD-62's

    yeah brian, unless you're running some ungodly high preamp voltage there's no reason that you can't set it lower than that... just use a DMM



    Caraudio.com - Where the average member couldn't wire a SPST toggle if they had to.


    More proof.
    Quote Originally Posted by Andrew_as View Post
    I need a program or something that will help me find mounting depth without having to build box and such...
    No, Andy, I'm sure the context is fine.

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    Re: CDT HD-62's

    ok i think i'll try passive for now, it will be easier to install. if i need to in the future i can switch it up to active when i get bored this winter!




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    Re: CDT HD-62's

    do you have a crossover already?



    Caraudio.com - Where the average member couldn't wire a SPST toggle if they had to.


    More proof.
    Quote Originally Posted by Andrew_as View Post
    I need a program or something that will help me find mounting depth without having to build box and such...
    No, Andy, I'm sure the context is fine.

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    Re: CDT HD-62's

    Yeah, the PG 15 band EQ and crossover.

    It's really detailed on how exactly I'm going to cross everything over for suitable results, when I go active, but it will be possible. It's hairy.

    Tweets - highpassed from amp (4k)
    Midrange - lowpassed from amp(4k), highpassed from eq/xover(200)
    Midbass - lowpassed from eq/xover(200), highpassed from amp(60)
    Subs - lowpassed from amp(60)




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    Re: CDT HD-62's

    Quote Originally Posted by GCAdidas13
    Yeah, the PG 15 band EQ and crossover.

    It's really detailed on how exactly I'm going to cross everything over for suitable results, when I go active, but it will be possible. It's hairy.

    Tweets - highpassed from amp (4k)
    Midrange - lowpassed from amp(4k), highpassed from eq/xover(200)
    Midbass - lowpassed from eq/xover(200), highpassed from amp(60)
    Subs - lowpassed from amp(60)

    I will most likely be selling my coustic soon, I can give you a decent price and meet you 1/2 so no shipping if you're interested that is.



    Caraudio.com - Where the average member couldn't wire a SPST toggle if they had to.


    More proof.
    Quote Originally Posted by Andrew_as View Post
    I need a program or something that will help me find mounting depth without having to build box and such...
    No, Andy, I'm sure the context is fine.

  13. #13
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    Re: CDT HD-62's

    Quote Originally Posted by GCAdidas13
    Yeah, the PG 15 band EQ and crossover.

    It's really detailed on how exactly I'm going to cross everything over for suitable results, when I go active, but it will be possible. It's hairy.

    Tweets - highpassed from amp (4k)
    Midrange - lowpassed from amp(4k), highpassed from eq/xover(200)
    Midbass - lowpassed from eq/xover(200), highpassed from amp(60)
    Subs - lowpassed from amp(60)
    I'd suggest trying the midrange at 200 and up without a lowpass filter on them. My CDT's sound totally different now with this setup. Due to my painted surfaces in my truck I was having "issues" and experimented with this setup...needless to say I will be alowing them to play as high as they want now. I'm currently hitting each channel with about 150 rms and they do well at moderately high volume, but I need to adjust my hp point on them...currently they are at 70...I just can't get the volume I;d prefer out of them and may bring them a bit higher...I understand your Kodas will EASILY take care of the midbass range though.

    Pat




    H/U: Sony CDX-MP80
    Front stage: CDT HD-62EF with image enhancement kit
    Subs: 3--Treo TSX-10
    Front stage amps: 2--MTX 202...one per channel
    Sub amp: Cadence A7-HC
    Equalization: Audio Control 4XS
    Dampening: 3 bulk boxes--Dynamat Extreme
    Alternator: 200a LC Excessive Amperage

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