Tech Square

• Not yet. (long) - cheap-Jack 13:14:09 03/01/06 (1)
  In Reply to: Dead end? posted by Granholm on March 1, 2006 at 12:36:37:

  Hi.

  Browsing over the specs sheet you linked, you can boost up O/P power of the module to 200W/C & 350W/C by raising B+/B- to +/-65V & to +/-80V respectively. This will need a 500VA & 875VA power iron, EI or pancake type regardless.

  But who needs such high power for home audio?

  Dynamic headroom is not decided by O/P power alone. Too high power, too high damping factor delivered to speaker systems of high efficiecny only 'freeze' up the speakers. It can make things worse.

  I play classical music, LP, CD & DVD-audio 95% to the time & my power amp is only 35W+35W & "dynamic headroom" is never a problem to me.

  Why? Speaker impedance & efficienct matching & the driver pre-amp
  never overdrive the power amp.

  Headroom is the max. power O/P delivered by the amps before clipping. Gain should be just enough to give the enough power & sound pressure levels SPLs to your ears so that there will be amble of headroom reserved for dynamic climaxes.

  Before you go further, tell me what pream you are driving the modules & what setting of the volume control you get for your
  SPL you are happy with.

  Higher the volume setting, say beyond 12:00 hrs, better will be the dynamic headroom available & more enjoyable will be the music.

  This is my sonic experiences, shared with many other audiophiles.

  c-J
  
  
  

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  • Not that long ;o) - Granholm 13:25:55 03/01/06 (0)
    In Reply to: Not yet. (long) posted by cheap-Jack on March 1, 2006 at 13:14:09:

    Hi,

    Thanks for your reply! My preamp as an acttive design (have been using various passive as well - ELMA attenuators 24 step) The volume nob is a multiturn so there is no 12.00 setting. But ther is a damping scale in the display and I normaly have a damping of about 40db and down to 24db at some classical recordings whan I am home alone.

    My initial request was also if I would get any benefit of beefing up the toroide and I was not sure my self this was the way to go. But as VA is not the only important factor I still look for information of what would make the best toroide? I can have one custom made and can choose my self how it should be made. Many owners of the ZapPulse have experienced improvement in sonic quality by using bigger toroides but to my knowledge bigger is not always better. Hence the question about best quality! If bigger is not the way to go then what?

    By the way thanks for your patience ;o)

    Have Fun
    
    

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