Finally SPL results for AV12s

Discussion in 'Home Theater Projects' started by JimRHIT, Apr 29, 2003.

  1. JimRHIT

    JimRHIT Stunt Coordinator

    Joined:
    Jul 11, 2001
    Messages:
    114
    Likes Received:
    0
    Hey guys, Finally got around to testing out the twins.

    Dual AV12s with 4 PR 15s. Tune = 19 or 20HZ

    100Hz = 113db
    90Hz = 110db
    80Hz = 108db
    70Hz = 109db
    60Hz = 108hb
    50Hz = 107db
    40Hz = 108db
    30Hz = 107db
    20HZ = 108db
    10Hz = 106db

    These are uncorrected meter readings...dont know the corr factors...anyone car to update these with the fix thats cool [​IMG]

    These are driven by NAD216THX one channel to each ~225Weach.

    I am quite happy with these results...but the amp was quite hot when i started..so it didnt want to keep up too long.

    I did see 124bds on the meter yesterdy on a cold amp at ~30Hz amd 118db at 20Hz... but the amp stopped liking that after about 10 seconds


    later everyone

    jim
     
  2. Justin Ward

    Justin Ward Supporting Actor

    Joined:
    Jun 6, 2002
    Messages:
    673
    Likes Received:
    0
    I'm not sure exactly what the correction values are but those numbers look awesome. You seem to have a very flat in-room response, did you EQ it?
     
  3. Brett DiMichele

    Brett DiMichele Producer

    Joined:
    Sep 30, 2001
    Messages:
    3,184
    Likes Received:
    0
    Jim,

    Those numers are LOW! The Correction factor from what I
    recall adds at least +6 Db to those numbers.. That's putting
    out some serious low bass [​IMG] [​IMG]
     
  4. Ronnie Ferrell

    Ronnie Ferrell Second Unit

    Joined:
    Jul 16, 2002
    Messages:
    355
    Likes Received:
    0
    Corrected values if you used the RS SPL meter.


    ________ORIG.___RS CAL__Corrrected
    100Hz = 113db___+2______115db
    90Hz = 110db____+1.75___111.75db
    80Hz = 108db____+1.5____109.5db
    70Hz = 109db____+1.5____110.5db
    60Hz = 108hb____+1.5____109.5db
    50Hz = 107db____+1.5____108.5db
    40Hz = 108db____+2.5____110.5db
    30Hz = 107db____+3.5____110.5db
    20HZ = 108db____+7.5____115.5db
    10Hz = 106db____+20_____126db

    [​IMG] 126db at 10Hz??? [​IMG] That's GOT to hurt!

    rf
     
  5. Geoff L

    Geoff L Screenwriter

    Joined:
    Dec 9, 2000
    Messages:
    1,702
    Likes Received:
    0
    I find it interesting that he is getting this with what might be considered slightly underpowering them. Am I missing something here?
    Well you do have 2 running that I missed when reading the post....

    Very very impressive numbers!

    Also is the tuning you belive correct. That kind of output below tuning, 10-hz wow, and a little strange to boot with that kind of spl below the mentioned tuning point.

    Jim:
    Did you notice the tuning around 19-20hz when doing the testing, the driver seemingly "moving the least" around that 19-20hz freq point?

    Where did you take the measurements from, listen postion, 3-feet and how big is the room your filling?


    WOWZER is all I can say, that 10-hz is flat out scary for the alingment/power actually!

    Regards
    Geoff
     
  6. JimRHIT

    JimRHIT Stunt Coordinator

    Joined:
    Jul 11, 2001
    Messages:
    114
    Likes Received:
    0
    Yeah, the low output is downright scary...moves walls in the house 3 floors down. I am not positive that my tuning is 100% accurate, as I just ordered the 1400g unit and slapped them in 3.2cubes w/ driver.

    To be honest, the PR are going much crazier at 10Hz than 20Hz ... so I don't know.

    gotta run to lab....back later to post more
     
  7. Kyle Richardson

    Kyle Richardson Screenwriter

    Joined:
    Jan 1, 1998
    Messages:
    1,076
    Likes Received:
    0
    Very impressive numbers. Did you test at 1 meter, listening position, or close mic'd?
     
  8. Geoff L

    Geoff L Screenwriter

    Joined:
    Dec 9, 2000
    Messages:
    1,702
    Likes Received:
    0
    Kyle

    Same thing I wanted to know, along with his room size if taken at the listening position.

    And the monster output a 10hz, strange given the possible tuning point!????

    A very "Curious"
    Geoff
     
  9. JimRHIT

    JimRHIT Stunt Coordinator

    Joined:
    Jul 11, 2001
    Messages:
    114
    Likes Received:
    0
    Hey everyone,

    The test were done with in my 13x16x(8 that slopes to 4) bedroom, living room, dining room...yeah one room apt.

    Radio shack meter was placed in 3 ft in front of left sub(they are stereo-style setup outside my RF3s). Test material was IASCA SSS Bass test(MP3 format) on my compter through the marantz via RCAs. I don't know why low end output is so huge. I am thinking that since these are pretty crappy boxes...lots of wall flex(read:scrap plywood), that may be adding to low end output. I have them 100% sealed up with gaskets from PE on the drivers and silicone in all cracks. These boxes are temporary until I decide what to do with them.

    I am going to try and post a movie(.mov..hope ya got qt) of the meter for the last 100HZ-10HZ sweep of the song...check back sometime Friday for that...have to get my friend's Kodak and I have 2 tests these next 2 days.
    Your guess is as good as mine, but I am not complaining about it.

    Anyways, I will let everyone know what happens this weekend when I hook a Crown Powerbase-2 to them to test some limits.

    About underpowering these...i don't know, that NAD is one hell of an amp.

    Take care

    Jim
     
  10. Geoff L

    Geoff L Screenwriter

    Joined:
    Dec 9, 2000
    Messages:
    1,702
    Likes Received:
    0
    Jim:

    Things are starting to be a little clearer now in how it's all together, room size, way of measurement, cabinets, et.

    Thanks for filling us in.

    As far as power, I ment that your quoted wattage was what I based that on. The Nad most likly has a nice amount of headroom and capable of more power than your quoted the contious power rating. I'd imagine the peek output is "much higher" and that as we all know is a good thing..[​IMG]

    You certainly can put out some serious deep spl thats for sure, crappy flexing cabinets with possible added hamonics and all!

    Regards
    Geoff
     
  11. Frank Carter

    Frank Carter Screenwriter

    Joined:
    Mar 12, 2002
    Messages:
    1,188
    Likes Received:
    0
    A job at Klipsch...I'm sooooo envious.
     
  12. Geoff L

    Geoff L Screenwriter

    Joined:
    Dec 9, 2000
    Messages:
    1,702
    Likes Received:
    0
    Yes Frank, the same thing I was thinking.
    Work that one might actually look forward to going to!

    To cool [​IMG]
    You Luck dog Jim!
     
  13. JimRHIT

    JimRHIT Stunt Coordinator

    Joined:
    Jul 11, 2001
    Messages:
    114
    Likes Received:
    0
    edit
     
  14. Brett DiMichele

    Brett DiMichele Producer

    Joined:
    Sep 30, 2001
    Messages:
    3,184
    Likes Received:
    0
    Jim,

    And those kids are gonna say "Who's Klipsch?" Now if you
    said "I work for Bose" then they would go "woah" [​IMG]

    Congrats! [​IMG]
     
  15. Frank Carter

    Frank Carter Screenwriter

    Joined:
    Mar 12, 2002
    Messages:
    1,188
    Likes Received:
    0
    Jim,

    I hate you[​IMG]...just kidding.

    Congratulations on your new job, now you can give us the inside scoop on whats up and coming at Klipsch.

    What's your official job title?
     
  16. JimRHIT

    JimRHIT Stunt Coordinator

    Joined:
    Jul 11, 2001
    Messages:
    114
    Likes Received:
    0
    Just sold one of 'em .. ya know you can make a pretty good profit on these [​IMG]

    take it easy ...

    jim
     

Share This Page