how to determine a speaker efficiency?

Discussion in 'Archived Threads 2001-2004' started by felix_suwarno, Jan 1, 2002.

  1. felix_suwarno

    felix_suwarno Screenwriter

    Joined:
    Dec 2, 2001
    Messages:
    1,523
    Likes Received:
    0
  2. Selden Ball

    Selden Ball Second Unit

    Joined:
    Mar 1, 2001
    Messages:
    412
    Likes Received:
    1
    Real Name:
    Selden
    Felix,
    More details are available about most Boston Acoustic speakers, including the VR965, in their "technical library" at http://bostonacoustics.com/library.asp
    Specifically, they claim it has a sensitivity of 90dB, so it'll work fine with just about any amp rating. (They mention 80W/channel.)
     
  3. felix_suwarno

    felix_suwarno Screenwriter

    Joined:
    Dec 2, 2001
    Messages:
    1,523
    Likes Received:
    0
    selden,

    my receiver is a denon avr1802. rated "80 watts per channel into 8 ohms". and i paid only 370 bucks for it. i just found it hard to believe that such an expensive speakers would run just fine on a modest receiver.

    and i found a few threads about people claiming the importance of having separated amps! i dont need to have the loudest sound system in the neighborhood, but off course i want the best i can get.

    if a cheap receiver can drive vr965 without any problem, why would people buy 3000 dollar receiver?

    thanks for the reply though
     
  4. Lewis Besze

    Lewis Besze Producer

    Joined:
    Jul 28, 1999
    Messages:
    3,134
    Likes Received:
    0
     
  5. Brett DiMichele

    Brett DiMichele Producer

    Joined:
    Sep 30, 2001
    Messages:
    3,181
    Likes Received:
    0
    Felix,

    If Bostons Specs are accurate which I am sure they are.

    This means that the VR965 will output 90 Decibels of

    Sound at 1 Amplifier Watt at 1 Meter. If your Receivers

    specs are accurate (Being that it's Dennon I would say it

    is accurate if not very close) You should be able to drive

    these speakers at 100 Decibels with 80 true RMS Watts.

    Why do people by High End Receivers and or Pre/Pro's and

    Seperate amps? Simply for more features, More power and

    cleaner music. With High End gear especialy Seperates you

    have "Dedicated" boxes that allow room to generate power

    cleanly and seperatly from the Source Switching and Signal

    Processing.

    Your Dennon is not a "slouch" in the performance area.

    Dennon is known to make some very high mid end products

    and I wouldn't consider any of the AVR Series to be "low Fi"

    as you seem to be assuming.

    There have been amplifier power charts relating to decibel

    output posted recently on the forum. Decibel output is much

    like top speed in a high performance car. You may be able

    to get "most" cars to acheive 130 MHP Top Speed with the

    proper aerodynamics and modest horsepower. But to go from

    130 MPH to 200 MHP takes an almost 6 fold gain in horsepower.

    The same can be applied to Decibels. Most systems that produce

    at least 80 true full bandwidth RMS watts can drive a very

    sensitive speaker (90DB or Higher) to a true 90 or even 100

    Decibel level. But to make that same speaker cleanly output

    130 decibels would take a 10 fold increase in wattage!

    Make any sense?
     
  6. felix_suwarno

    felix_suwarno Screenwriter

    Joined:
    Dec 2, 2001
    Messages:
    1,523
    Likes Received:
    0
    thank you very much Brett.
    http://vhylynx.net/vhylynx_pages/vhy...r_hardware.htm
    thats my current system. my first ht, and i bought the sound system based on this forum's recommendation. the bostons are my dream system!
    i have learned a lot from you guys. i also visit avsforum, but this forum is just better.
     
  7. Brett DiMichele

    Brett DiMichele Producer

    Joined:
    Sep 30, 2001
    Messages:
    3,181
    Likes Received:
    0
    Felix,

    Glad I could be of assistance. That is after all what this

    forum is all about. To share and to learn from others.

    Your system looks great to me. Some people are too concerned

    with dropping names and price tags. I don't feel those are

    true enthusiasts. The true enthusiast is one of the first

    people to help others and also the first to admit he is always

    learning.

    Great system and web page. Check mine out by clicking the

    link below my signature if you want.
     

Share This Page