enough amp?

Discussion in 'Archived Threads 2001-2004' started by Brian Schucher, Mar 12, 2002.

  1. Brian Schucher

    Brian Schucher Supporting Actor

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    Ello folks.. Heres my dilemma. Im trying to work my way towards separates based system. Currently using a Marantz SR7000 and just picked up a Newcastle 9080 amp for really cheap. Its rated at 120per i think.. Im not really going to be using the amp for a while since my house is being built now and im doing a garage conversion for the HT. The room will be about 16x20 when done.. Im using Miarge speakers..OM6. OMC2, OMR2.. anyone think i will be underpowered for this room with these speaks?? Also plan on the 950 when i move this summer..
     
  2. Brian Schucher

    Brian Schucher Supporting Actor

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    Nobody? I know there are people here with the knowledge to give me an opinion [​IMG]
     
  3. ColinM

    ColinM Cinematographer

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    Roughly -

    Take the sensitivity of your speakers (86db)

    At one watt (1)

    Add 3 db every time you double the watts

    2 89

    4 92

    8 95

    16 98

    32 101

    64 104

    128 107

    Then cut 3 (?) db off for every doubling of the distance. The sens. is figured at 1m.

    2m = 104

    4m = 101

    If this was with my speakers in my room, I'd be out of juice at 98db or so.

    The distance cut may be 6db per doubling, I forget.

    - CM

    This may be completely off base due to MANY factors.....
     
  4. Lee-c

    Lee-c Second Unit

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    I think you lose 6db for every doubling of the distance past 1 yard. So, if you are 2 yards away

    from the speakers when you listen, you've lost your first 6db of volume. If you are 4 yards way,

    then you lose another 6 db. If you are 8 yards away, another 6db. Most people are going to be

    sitting between 2 and 4 yards away from the speakers.

    The goal being to have enough power to get your speakers to reach Dolby Labs reference level

    for volume at the viewing position for movies.
     
  5. ColinM

    ColinM Cinematographer

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    Brian?

    Answered?
     

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