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Thread: Amplifiers are more significant than you may think!

  1. #46
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    DF?

    I read that D.F. factor is the ratio {speackers real impedace/[amps output impedance+wire impedance]} .
    Here is the link about DF(maybe all in this member already knew?)

    http://www.crownaudio.com/pdf/amps/damping%20factor.pdf

    I think DF have a some value for a fine sounds and can't say meaningless.
    Maybe,It's difficult to design low output impedance circuit.
    If Power means voltage*current,there needs more & more capbility to providing enough current when driving 15 inch woofers.
    It's my experience.
    At least, To driving 4343B with tight & powerfull sound I needed MA2402, not MA1202 in spite of which can provide 285W+285W power!
    There was a obious difference bitween 2402 to 1202.
    One is embiant sounds. 2402 can express enough surrownding atmosphear.
    Two is clear mid sounds. especialliy for male vocal.
    Three is base sounds. only the enough power can drive Hip base sounds. it may be over 500W+500W! so it needs MA2402.

    When I used accuphase M-100 mono power amps, Power was enouph but it had a little caractor.
    Thats why I changed to Crown PA amps .

    Anyway, in my opinion, There needs over 500W+500W & DF1000 for diving 4343B with hi-fi sounds , I feel.
    but I know power & DF is only one side elements of measurement.
    Last edited by Chan; 09-01-2003 at 05:28 AM.

  2. #47
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    This might be of interest

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  3. #48
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    Re: This might be of interest

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  4. #49
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    More George :)

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  5. #50
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    Re: More George :)

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  6. #51
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    Re: More George :)

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  7. #52
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    Pretty standard blurb

    I was reading through one of Dr. Electron's posts and cropped this out of a manual he kindly linked to:
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  8. #53
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    Augspurger

    What does he know? He is a paid shill !

  9. #54
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    QUOTE]Originally posted by Giskard

    >I used Citation 19's with my 4343B's.

    Oh, Itfs fine.
    Ifve heard that American dislike 43series monitor. Is it true?
    Many of people like furniture-like model?
    Anyway, It may be just fun.

    >Stereo Citiation 19 with passive network, bridged Citation 19's with passive network, and bi-amped Citation 19's with the 5234A.

    Great! It will be ideal. I will do same way by crown someday.

    >One cool feature was that the Citation 19 could dump a whopping 3.7 amperes into 8 ohms and 6.3 amperes into 4 ohms! That's nothing now, but back then it was the bomb

    Must be It wasc.
    Nowadays many amps can draw more current.
    I donft know how to design hi-fi amps exactly.
    But, some amps is fitted for large sized monitor, some amps are not,thatfs it.

  10. #55
    Senior Member Ian Mackenzie's Avatar
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    I note on the more recent JBL Project manuals JBL mentions care of all contacts and regular cleaning for best electrical conductivity.

    Others claim cable terminations and equally important as low loss cables and often impact more frequently on sound quality (particularly bass where high currents flow) than we would care to realise.

    Ian

    Ps I recall the Citation 19 paired with a set of JBL 4311's at a semi pro demo with an Otari multi track recorder about 20 odd years. In mean WOW.

    It was mind blowing to hear such compact boxes shack the crap out of us like the Wrath of God. I figure the Citation had a hand in it.

  11. #56
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    Originally posted by Ian Mackenzie
    I note on the more recent JBL Project manuals JBL mentions care of all contacts and regular cleaning for best electrical conductivity.
    Ian

    that's true.
    regular cleaning is so important not a tiny matter.
    about measurement?, loss will be very very little.
    but,there is a surprising difference in actual sound.

    I use original connection and internal code(in case of 4343B).
    because, it may be tuned by them for original sound.
    I dont mind what connection is used
    but about speacker wires , I use low impedance OFC cable,but not expensive.

    My equipment is this.

    tascam M-50 mixer
    otari Mx-5050-8track
    studer a810-2track
    tascam c-1 2track casset deck
    JVC eq-7070 phono EQ
    JVC sea-7070 graphic EQ
    lexicon mpx-? delay
    acmron(crown) MA2402 MT1201
    yamaha PC-1000
    JBL 4343BWX
    JBL SF-15
    JBL 4301BWX
    Last edited by Chan; 09-02-2003 at 05:44 AM.

  12. #57
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    Hello to all of you

    HERVEM will take part to a PSS amplifier test and I hope that he will enjoy it and that he will post here his feedback!

    I will forward you several links were testers will print their judgment (it will be French written unfortunately but it may be translated not by me as I may modify their words).

    This will give you an idea about what we speak since several weeks now!

  13. #58
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    Pls have it translated, surely, most of Us cant read French well enough, so Yr effort would be wasted.

    Alex.

  14. #59
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    You can read some feedback on our forum boards "What do they think/say about PSS amplifiers"!

    PSS Forums


    It is not that new but it is not that old too...

    I hope that in a forthright I will have the first feedback about our latest test made with 6 audiophile/diyers.

  15. #60
    Junior Member IDF's Avatar
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    I will forward you several links were testers will print their judgment (it will be French written unfortunately but it may be translated not by me as I may modify their words).
    This will give you an idea about what we speak since several weeks now!
    __________________________________________________ ___________________________________________

    Hummm
    Being French, I have been able to read the review tests about PSS stuff..
    I dont like to sound negative but that looks like a medium quality karaoke-like.
    The prices they are sold are cheap, abradabrant to the actually high labour and social costs in France.

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