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Reload Thread: Worth the extra $ for higher preamp voltage???

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    Worth the extra $ for higher preamp voltage???

    So I am looking at two units; JVC KD-HDR70 or JVC Arsenal KD-AHD79, both are identical except for the preamp voltage. Arsenal has 5volts and other unit has 2.5volts. Only a $10 difference for the Arsenal unit, which I will prob go with. Is there a noticable difference with going with the higher voltage or not really? Only will be running a mono amp (Boston Acoustics 400m).







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    Re: Worth the extra $ for higher preamp voltage???

    Higher voltage pre-outs are good for longer RCA runs and lower distortion. Since you don't have to crank your amp gains as high, you have less chance of noise. If the power is higher, it will drive a longer run of RCA's without needing more gain.




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    Re: Worth the extra $ for higher preamp voltage???

    ^^^ yea that's pretty much it lol.

    go with the 5v.




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    Re: Worth the extra $ for higher preamp voltage???

    for an extra $10, why the hell not?




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    Re: Worth the extra $ for higher preamp voltage???

    I like my 8V HU.

    IMO it makes a difference.



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    Re: Worth the extra $ for higher preamp voltage???

    Thanks for the info. I was going to go with the Arsenal unit anyways, since its only $10 higher, but I was just curious. Thanks again




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    Re: Worth the extra $ for higher preamp voltage???

    Quote Originally Posted by VWBobby View Post
    Higher voltage pre-outs are good for longer RCA runs and lower distortion. Since you don't have to crank your amp gains as high, you have less chance of noise. If the power is higher, it will drive a longer run of RCA's without needing more gain.
    No, but for 10 dollars why not.



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    Re: Worth the extra $ for higher preamp voltage???

    id save the money and buy a cheap fifth....you can match the amp gains to 2.5 or 5v input....and it will sound the same




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    Re: Worth the extra $ for higher preamp voltage???

    go for the 2.5v, send me the $10



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    Re: Worth the extra $ for higher preamp voltage???

    Get the 5v. I'm actually considering getting a line driver to bump my pre-amp voltage to 8-9v.



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    Re: Worth the extra $ for higher preamp voltage???

    audibly you wont notice any change

    but your mind will constantly think

    "what would it sound like if I had paid $10 more for the 5V"

    trust me, ive been there. Its all in your head and it will drive you crazy




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    Re: Worth the extra $ for higher preamp voltage???

    Quote Originally Posted by blazeplacid View Post
    audibly you wont notice any change

    but your mind will constantly think

    "what would it sound like if I had paid $10 more for the 5V"

    trust me, ive been there. Its all in your head and it will drive you crazy
    Eh, I'd disagree.



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    Re: Worth the extra $ for higher preamp voltage???

    Quote Originally Posted by Buck View Post
    Eh, I'd disagree.
    on high enough quality speakers you may notice more noise on a 2v than a 5v. and also, its nice to have 5v in the case that you need to use an RCA splitter because the voltage still stays reasonably high (>2v)




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    Re: Worth the extra $ for higher preamp voltage???

    Quote Originally Posted by double deez View Post
    on high enough quality speakers you may notice more noise on a 2v than a 5v. and also, its nice to have 5v in the case that you need to use an RCA splitter because the voltage still stays reasonably high (>2v)
    How are you going to hear noise from low preout voltage if you set your gain right?



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    Re: Worth the extra $ for higher preamp voltage???

    Obviously a lot of people in this thread haven't played around with pre-amps and power amp gain settings....
    Anytime you bump up your gain, you are amplifying more noise. Garbage in, garbage out.
    Lets say you have a 15 foot run of RCA's from the front to the back and need to crank up your amp 3/4 of the way to match your front speakers. Usually you will hear a slight hiss. The noise floor is higher and sometimes the sound is compressed or squashed sounding.
    Anyone who's played electric guitar or bass knows all about the noise associated with high gains, cheap cables (microphonics) and change in tone. Same subtle hints happen in car audio if you listen for it.

    In short, there's a reason high quality HU's have 4-8V pre-outs verses the mainstream 1.5-2.5V outputs.




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