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Thread: Some information for those skeptics

  1. #11
    Variable Bitrate FyreDaug's Avatar
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    I'll let you know when it does break. But for the qualityrice you cant beat it. Even a good HU can hardly compare. Plus find me a 7.1 car audio amp that takes an optical signal.

    I know something will break eventually but I guess only time will tell. So far, not 1 problem

    EDIT: And the way its mounted I like it, its hanging from the top part of the trunk and its not in the way of anything. It sits up nice and high and doesnt block anything. Plus its easily accessable if I need to change settings and stuff with the remote from up front.

  2. #12
    Constant Bitrate cbergeron's Avatar
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    I don't think you'd be able to hear the difference in a car. With road noise and the general acoustics of the car.

    It would also cost a *****load of money to go 8ohm in a car; and it would draw _much_ more power from the vehicle power system.
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  3. #13
    Maximum Bitrate
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    Daug, any noise issues between your power inverter and amp?

  4. #14
    Newbie gmcgann's Avatar
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    Quote Originally Posted by cbergeron
    It would also cost a *****load of money to go 8ohm in a car; and it would draw _much_ more power from the vehicle power system.
    Um, no... it would draw less. That's why we use lower resistance speakers in cars nowdays - they play louder with less current. If you have an amp that puts out 100 watts into 4 ohms it would put out 200 into 2 ohms, assuming the amp could flow that much current. If you went to 8 ohm speakers it would put out 50 watts.

  5. #15
    Nic
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    Quote Originally Posted by gmcgann
    Um, no... it would draw less. That's why we use lower resistance speakers in cars nowdays - they play louder with less current. If you have an amp that puts out 100 watts into 4 ohms it would put out 200 into 2 ohms, assuming the amp could flow that much current. If you went to 8 ohm speakers it would put out 50 watts.
    i was lead to believe lower resistance speakers are used in cars because it is easier to supply more current than increase the voltage, if you compare a car audio amp putting out 4*50w and a home theatre amp at 4*50w i think you will find the home theatre amp uses more electricity, first off theres a lot more **** in a home theatre amp than a car amp, secondly car amps are designed to be efficient because of the limited power in a car.
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  6. #16
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    Power is power,

    P = V^2 / R
    P = I^2 * R

    P = power in Watts
    V = voltage in Volts
    I = current in Amps
    R = resistance in ohms (I = V/R btw)

    Also, there's this thing called a maximum power transfer curve. The maximum amount of power is transferred to any load when the load impedance is equal to the supply resistance, so if the internal resistance of your amplifier is 4 ohms, then the best way to get the most power is to use 4 ohm speakers. There's all kinds of literature on maximum power transfer and how it works.

    It takes at least 50 watts of 12V power to drive your speakers with 50 watts of power, more because of amp efficiency. Power supplies (read: Amplifiers) will always be most efficient when they're operating near their input voltage, so if your amp. output voltage is closer to 12V you'll loose less power to heat.

    Other than that, there's nothing a home stereo amp will do for you, other than be a pain in the ***.

    Another note: going from 12VDC -(inverter)- 120VAC -(home amp)- Speaker power is a really dumb thing to do if you want an efficient system. Going from 12VDC -(car amp)- Speaker power is a much smarter thing to do, and until someone shows me real data to support otherwise i'm going to stick to my 12V amps.

  7. #17
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    hmmm, going by your theory, I can also put a refigerator & a microwave in the back of my van too! why stop there, I can take my 30" picturetube tv from my living room & throw that in there too!

    the idea behind "upgrading" aspects of your vehicle originates from making it "better" & most people would prefer using something that fits the job, both functionally & physically, not to mention astetics. if that wasn't the case then just throw a desktop in the back seat & your old 15" monitor on the frontseat & BAM, instant carputer!!

    the main reasons to not use a home theater amplifier in your car is pretty much the same reasons why you wouldn't use a 15" crt in your dash:

    1) there are better "tools" for the job
    2) it is around 5 times the size neccisary to get the job done
    3) I don't use a jack hammer to clip my toenails

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