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Reload Thread: SD8000 amp... supposedly puts out 12k RMS at 12v?!

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    SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Someone showed me this and I still think its fishy, I mean looking at the internals and its size it doesnt seem like it could happen... there's the link
    http://audioforum.termpro.com/topic/20/14104.html



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    that ****er has some big caps



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    He had a thread on here, but I have yet to see or hear of anyone in America using them.



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    I find their results hard to believe with that little of FET's on the board. Unless they're cryogenically cooled or something




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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    ive hardly even heard of sound digital , and it just seems odd to have a amp that small produce that much



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Pretty good results from such a small package..



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!




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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    oops didnt know it was a repost



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Quote Originally Posted by snoopdan View Post
    I find their results hard to believe with that little of FET's on the board. Unless they're cryogenically cooled or something
    I don’t.

    Technology gets better as the years progress.

    Take a look at the computer for instance. Remember when one system used to take up a whole room?

    Or the Original Tandy, IBM ect.

    Now they are the size of a small pizza box and even some can fit into the palm of your hand like an Iphone and are a million times more powerful.

    And even more so with Virtual Machines being able to run 30 Full running OS computers on one box cutting down physical Server room size.


    IF this power claim was coming from a source like Audiobahn or Sony yeah I would call BS.

    But Sound Digital seems like they are on to something here. If I had deep pockets I would pick up one of their small 1000w amps and give it a demo.



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Quote Originally Posted by Shinju View Post
    I don’t.

    Technology gets better as the years progress.

    Take a look at the computer for instance. Remember when one system used to take up a whole room?
    not quite a good compairison. You can only move so much current thru FET's. Physically there is a limit (which is why you have amps with 40+ FET's in them.) Plus their board isnt reallly a radical design or anything, everything is layed out pretty normal consistant with most higher end amps on the market.

    If someone wants to name off the FET part numbers off the board, then we could just go to a site like Digikey and see what they are actually capable of. I'm sorry, there is no magic power supply or some ****, parts are parts.




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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Thanks for the good post, Shinju.

    Our amps use the most advanced parts that we can buy in market, and have H bridge output topology, means that we need only 4 transistors (or multiples) to do all the switching job. We use also a microprocessor to manage all the functions of the amplifier and the power supply.

    Chinese and Korean amps (that almost everybody runs under well-known brands) use half-bridge topology, so they need to use at least the double components, and they use not the top rated ones like us, they use the best for budget (sometimes you can buy 10 transistors using the same price we pay for just one, stronger).

    In the SD8000 we use 90N20 FET´s on output, 8 of them. I recommend reading a bit about D class amplifier fundamentals, the power dissipated on the output FET is the result of the square of the current flowing through it times the resistance (RDSon) of the FET on a assumed gate voltage.

    On other words, you cannot say what is the power outputted by the amp looking to FETS, you can have that measuring what is the voltage of the power supply under load or better, measuring the power at output.

    I guarantee that if you provide enough power you will easily break the 12kW barrier, at 16V, with a 17 inches SD8000.

    We have several consumers that measured the power, I can remember one: Team Rip Rock, form Canada (an extreme vehicle, competitor of dB drag) they had this results of a SD8000:

    12970W in 15.08V and 1.7ohms

    For the tests you really need to provide stable input voltage. The amp holds high power until reach 7.5V, then it shutdown. (no, it won´t blow, don´t worry)

    SD8000 measures 17 inches long, and on top of that our amps reproduces from 10Hz to 15kHz, yes, you can play tweeters, mid ranges, anything.
    Last edited by murilo; 03-19-2009 at 01:48 PM.



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    I still say I wanna see someone test a 40.1 vs any of their amps in a car on a TL for all data.



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Quote Originally Posted by TurdFergueson2 View Post
    He had a thread on here, but I have yet to see or hear of anyone in America using them.



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    those are some pricey *** amps



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    Re: SD8000 amp... supposedly puts out 12k RMS at 12v?!

    Quote Originally Posted by dragnix View Post
    those are some pricey *** amps
    How much?



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