2.3TL How much power needed?

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  • jim 249
    jim 249 Posts: 347
    edited November 2009
    "A 12 X 24 room is a disaster for standing waves. Add in (guesstimate) an 8' ceiling, and you'd have a "perfect storm" of dimensions. 24 is a multiple of both 8 and 12; the standing waves would be incredible. Put the listening position in a null area--and you'll have NO bass no matter what you do. If the listening position is in an area of peak response, it'll boom like crazy"

    You may have hit the nail on the head with this post. On the other end of my bonus room is my HT setup and I am running 3 Sunfire subs and do manage to get decent bass response. With just one I got hardley any bass response at all. I was thinking about adding some carpet to the walls to try and help out the acoustics of the room but really don't know where to start. What are standing waves anyway? Thanks; Jim
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  • Schurkey
    Schurkey Posts: 2,104
    edited November 2009
    jim 249 wrote: »
    I was thinking about adding some carpet to the walls to try and help out the acoustics of the room but really don't know where to start.
    Carpet won't help with standing waves. If your room was too "bright" (excess high-frequency reflection) the carpet would be a big help.

    There's a certain school of thinking--Live End/Dead End--where you'd put sound-deadening on one end of the room, but not all the way around. Having sound deadening material all around would kill your perceived treble at the listening position.
    http://www.acousticalsolutions.com/education/pdfs/Control_Rooms.pdf
    http://www.stereophile.com/features/38/
    jim 249 wrote: »
    What are standing waves anyway? Thanks; Jim
    http://www.audiomasterclass.com/arc.cfm?a=the-problems-caused-by-standing-waves-in-small-acoustic-spaces

    and a calculator: (but what is 24 feet converted to millimeters???)
    http://www.vikash.info/audio/standing_wave_calc/
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  • Schurkey
    Schurkey Posts: 2,104
    edited November 2009
    Hopefully, I didn't screw up the foot/mm conversion.

    You've got a shitload of standing waves in that room...


    Dimensions:
    Enter the internal height, width and depth dimensions
    of an enclosure

    Height 2438.4 mm
    Width 3657.6 mm
    Depth 7315.2 mm


    Calculated internal volume:
    65242.01 litres.

    Standing wave modes
    Mode Height Width Depth
    1 70 Hz 47 Hz 23 Hz
    2 141 Hz 94 Hz 47 Hz
    3 211 Hz 141 Hz 70 Hz
    4 281 Hz 188 Hz 94 Hz
    5 352 Hz 234 Hz 117 Hz
    6 422 Hz 281 Hz 141 Hz
    7 492 Hz 328 Hz 164 Hz
    8 563 Hz 375 Hz 188 Hz

    Look at the numbers that repeat from column to column--those are frequencies that resonate in two (or ALL THREE) dimensions.
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