87dB Sensitivity

Discussion in 'Speakers' started by Stelios, Dec 5, 2003.

  1. Stelios

    Stelios Stunt Coordinator

    Joined:
    Nov 19, 2003
    Messages:
    115
    Likes Received:
    0
    Hi everyone

    Is 87dB Sensitivity good for HT speakers? Which one is better, higher or lower db? Is it related to the receiver amplifier? Any thoughts would be appreciated.

    Stelios
     
  2. David Judah

    David Judah Screenwriter

    Joined:
    Feb 11, 1999
    Messages:
    1,479
    Likes Received:
    0
    It's on the lower side compared to many current speakers that are in the 89-90+ range, but certainly not unreasonable. If you like the sound of the speakers don't let lower sensitivities scare you away.

    It means the speaker will put out 87 dB on an SPL meter with 1 watt from 1 meter away. Every doubling of power you pick up 3 dB, so if you do the math 2W=90 dB, 4W=93 dB, 8W=96 dB, etc... Incidently, for every doubling of distance you lose around 6 dB(except for line source speakers which lose 3 dB).

    As you can see, it will give you an idea how much power you need to reach a specific level, although the absolute values are more difficult to predict in an actual room.

    DJ
     
  3. Stelios

    Stelios Stunt Coordinator

    Joined:
    Nov 19, 2003
    Messages:
    115
    Likes Received:
    0
    Thanks David Judah for your prompt and informative explanation. The speaker that I have in mind is the SONY SA-VE835. I do like the looks and the reports I get is that, it is a very good speaker for the price you pay. The Receiver that I have ordered is also SONY the STR-DB790.

    Stelios
     
  4. Michael R Price

    Michael R Price Screenwriter

    Joined:
    Jul 22, 2001
    Messages:
    1,591
    Likes Received:
    0
    Of course, keep in mind that many, or even most sensitivity specifications are inflated by as much as 3-5 db. If the speaker is actually 87db sensitive and doesn't dip much below 8 ohms, that's not bad.
     

Share This Page