1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Using a sound meter

Discussion in 'Home Cinema Speakers' started by rimibar, Mar 11, 2004.

  1. rimibar

    rimibar
    Active Member

    Joined:
    May 17, 2003
    Messages:
    424
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    21
    Location:
    Cambridge
    Ratings:
    +3
    Hi everyone,

    Sorry for sounding like a total AV virgin, but I have just purchased a Radioshack sound meter to finetune my kit (details below).

    How do I go about using it? I have a general idea, but further advice would be most helpful.

    Thanks in advance!

    Richard
     
  2. Programmergeek

    Programmergeek
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    set the frequency to the low end 60 or so, play the test tone for ea speaker, ignore the sub, set the channel level so that the volume is the same on each channel in the place you will normally be sitting.
     
  3. rimibar

    rimibar
    Active Member

    Joined:
    May 17, 2003
    Messages:
    424
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    21
    Location:
    Cambridge
    Ratings:
    +3
    What volume should the amp be at before I alter each speaker level?

    Thanks!
     
  4. StevieDvd

    StevieDvd
    Active Member

    Joined:
    Dec 27, 2003
    Messages:
    1,368
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    66
    Location:
    Stevenage, Herts
    Ratings:
    +151
    I'm no expert at this by a long shot but from the info I was given you set your amp to '0' which should be either 75db or 85db. What you then look for is a level on each speaker of 75db.

    If you don't listen at that level then you would have your amp at say -20 but the speaker levels would all be the same.

    Logically I would guess if you had your amp at -10db then youwould look for a level of 65db, cause the test tones are quite loud at 0.

    Some members advocate setting the levels with one of 2 DVD setup discs which cost around £12-20 with more realistic test tones. I did the amp test tones first, noted the levels and then did the DVD and the difference on mine was minor but slightly more balanced as far as I could ascertain.

    Hope that helps, some more knowledgable than me will probably update us all.

    Steve
     
  5. Gordon @ Convergent AV

    Gordon @ Convergent AV
    Distinguished Member AVForums Sponsor

    Joined:
    Jul 13, 2000
    Messages:
    13,977
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Living in Surrey, covering UK!
    Ratings:
    +2,779
    Make sure you set the meter to C weighted and SLOW.

    I use an external disc (avia). I found on my own amp that using the internal generated tones results in a 4dB too high centre channel. I was using a $2000 real time analyser with calibrated microhone for the measurement though. I don;t know what sort of tolerance the RS meter has.

    Gordon
     
  6. bedders

    bedders
    Standard Member

    Joined:
    Apr 29, 2003
    Messages:
    219
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    21
    Location:
    UK
    Ratings:
    +2
  7. engaged

    engaged
    Standard Member

    Joined:
    Jan 12, 2004
    Messages:
    179
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Edinburgh
    Ratings:
    +2
    Where did you get it from - and was it the analog or the digital meter?

    Thanks.
     
  8. rimibar

    rimibar
    Active Member

    Joined:
    May 17, 2003
    Messages:
    424
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    21
    Location:
    Cambridge
    Ratings:
    +3
    Thanks for all the info guys - have played last night and it does sound noticeably better - very pleased with results..... .....As are my friends who have booked me to balance their systems. I'm sure there should be profit in this somewhere??? :p

    Regarding where I got it from http://www.radioshack.co.uk/prodDetail.php?p=3302055

    Thanks!
     
  9. Nimby

    Nimby
    Member

    Joined:
    Jan 27, 2004
    Messages:
    9,198
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    The Danish Bacon Factory
    Ratings:
    +669
    Good link. Thanks nikbedwell.

    The question that occurs to me is: If a dealer sells AV equipment then why don't they sell SPL meters over the counter?

    An SPL meter is your speedometer on your AV car. It is your driving license to own and run multi-channel AV. It is your tuning station to keep things running smoothly.

    It is really that important. Isn't it? So why don't AV dealers have them available from stock? Like all the other, much less important, accessories they want you to buy.

    If I walk out of the dealer with £15K AV setup isn't as worthless without an SPL meter as a system without the cables? :rolleyes:

    Nimby
     
  10. Ian J

    Ian J
    Banned

    Joined:
    Aug 6, 2001
    Messages:
    25,529
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Ratings:
    +4,906
    It would be more sensible for the dealer to hire one out as most people only want it for a day or two.
     
  11. Nic Rhodes

    Nic Rhodes
    Well-known Member

    Joined:
    Mar 23, 2001
    Messages:
    17,133
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    133
    Location:
    Cumbria
    Ratings:
    +1,277
    and most SPL meter like the radio shak are pretty poor to be honest, as well as giving the wrong figure, they are not consistent so these corrections' that everyone uses in the bass region a meaningless. You need to spend more money on a meter or get a decent microphone
     
  12. Gordon @ Convergent AV

    Gordon @ Convergent AV
    Distinguished Member AVForums Sponsor

    Joined:
    Jul 13, 2000
    Messages:
    13,977
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Living in Surrey, covering UK!
    Ratings:
    +2,779
    I would suggest that if you bought 15K worth of AV kit and your dealer didn't actually set it up (or offer to set it up) to perform properly then perhaps you are in the wrong dealers.......

    Hiring a meter like Ian suggest might be an idea that dealers could take up.

    Gordon
     
  13. rimibar

    rimibar
    Active Member

    Joined:
    May 17, 2003
    Messages:
    424
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    21
    Location:
    Cambridge
    Ratings:
    +3
    Interested in reading your comments beekeeper. What would you suggest as a cost effective solution?
     
  14. Nic Rhodes

    Nic Rhodes
    Well-known Member

    Joined:
    Mar 23, 2001
    Messages:
    17,133
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    133
    Location:
    Cumbria
    Ratings:
    +1,277
    Use your dealer :)

    Depends what you want to do, if for say 3KHz, rat shak not too bad, but for bass :(

    Affordable solutions might be a calibration mike into a soundcard. I am about to receive (after a huge wait) a Behribger ECM8000 to try, they are £35 - £38 each. You probably have a sound card already

    http://www.behringer.com/ECM8000/index.cfm?lang=ENG

    the bottom line is you get what you pay for here and therefore have your dealer do the work is a great way forward and the reason I have endorsed dealers
     
  15. Fishbones

    Fishbones
    Standard Member

    Joined:
    Jan 26, 2004
    Messages:
    126
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    21
    Location:
    Madeira
    Ratings:
    +1
    Great....what real-time analyzer software would you recomend?
     
  16. Nic Rhodes

    Nic Rhodes
    Well-known Member

    Joined:
    Mar 23, 2001
    Messages:
    17,133
    Products Owned:
    0
    Products Wanted:
    1
    Trophy Points:
    133
    Location:
    Cumbria
    Ratings:
    +1,277
    Let me have a play first but what about the stuff Tag recommends?
     

Share This Page

Loading...