Cool SPL calculator

organ
organ Posts: 4,969
edited February 2004 in 2 Channel Audio
http://www.myhometheater.homestead.com/splcalculator.html

Not sure about the amplifier power. Are we suppose to put in the power for one channel or both?

I can hit 117.1 db with the Klipsch and NAD with 120w for amp power. That's just one channel.

With 240w for amp power (2CH), I get 120.1db:eek: .

Those spl readings are using the RMS amplifier power. CRAP!

Maurice
Post edited by organ on
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited February 2004
    Oh well, I'm only at 113.5. I severely doubt it even gets that loud in a 6000 ft^3
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • JDOGG
    JDOGG Posts: 433
    edited February 2004
    100 watts amp power,distance 4 ft., 96dB sens., 2 speakers,in corner, 4 ft. distance from listening position=
    123.3 dB at listening position!
    Panasonic VIERA 46" 1080p plasma
    Onkyo TX-SR805
    Klipsch RF-7(bi-amped)
    Klipsch RF-25
    Xbox 360 with HD DVD
    Playstation 3
    Cobalt Cable
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  • F1nut
    F1nut Posts: 50,654
    edited February 2004
    Distance 4 feet? Talk about a near-field experience.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • weavercr
    weavercr Posts: 289
    edited February 2004
    polks I get 119.3 RMS

    my klipsch I get 132.7 RMS

    same amp a/b switch. Denon POA2400a

    Neve have cranked the klispch to max yet, too loud plus CD skips before you get there.
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  • VR3
    VR3 Posts: 28,748
    edited February 2004
    Says with the mains, RT5, RTi70 - 2 545, 1 535. One channel, I can hit.......118db

    Says my Dad's can hit 121...

    I've heard them go MUCH louder than that..........................

    Says my entire system can hit up to 130db.....
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • PolkWannabie
    PolkWannabie Posts: 2,763
    edited February 2004
    Weavercr,

    Isn't that amp 200wpc ?

    Assuming your Polks are 89 db ?! , you'd have to be 2 feet away to get that SPL.

    Nice Head Phones ... LOL ...
    Rick
    HT+ Sunfire TG IV, Dual CG Sig II's, CinePro 1K2, Oppo 981, Audio Technica PL120, Polk SRT's & F/X1000's, Samsung 71" DLP
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  • organ
    organ Posts: 4,969
    edited February 2004
    Originally posted by weavercr
    polks I get 119.3 RMS

    my klipsch I get 132.7 RMS

    Holy crap! Which model do you own? Klipschorn?

    Maurice
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  • F1nut
    F1nut Posts: 50,654
    edited February 2004
    "my klipsch I get 132.7 RMS"

    With your head inside the horn....maybe :rolleyes:
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • PolkWannabie
    PolkWannabie Posts: 2,763
    edited February 2004
    ROTFL ... Well the older K-Horns could muster 104 db some how so it's theoretically possible, but can you say industrial deafness ? Besides, louder hardly makes it better ... that's the Bose philosiphy.
    Rick
    HT+ Sunfire TG IV, Dual CG Sig II's, CinePro 1K2, Oppo 981, Audio Technica PL120, Polk SRT's & F/X1000's, Samsung 71" DLP
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  • VR3
    VR3 Posts: 28,748
    edited February 2004
    My Dad's Klipsch Chorus are 102db nominal. 120db.....is easy for them things. He only has 270, they can take up to 1000 watts.....
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • F1nut
    F1nut Posts: 50,654
    edited February 2004
    How can they be 102dB nominal? There is no such measurement. The only nominal measurement is the ohms rating.

    Personally, I consider that chart to be flawed at best.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • gidrah
    gidrah Posts: 3,049
    edited February 2004
    Dang Weavercr! I thought I was doing good with my 120db Altec VOTs.
    Make it Funky! :)
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  • VR3
    VR3 Posts: 28,748
    edited February 2004
    FREQUENCY RESPONSE:35Hz-20kHz±3dB
    SENSITIVITY:102dB @ 1watt/1meter
    POWER HANDLING:100 watts maximum continuous (1000 watts peak)
    NOMINAL IMPEDANCE:8 ohms
    ENCLOSURE TYPE: Sealed - Passive Radiator
    DRIVE COMPONENTS:Three-way design using one 1" (2.54cm) phenolic diaphragm compression driver tweeter with a 90°x40° Exponential horn, one 1.5" (3.81cm) phenolic diaphragm compression driver midrange with a 90°x40° Exponential horn and one 15" (38.1cm) fiber-composite cone woofer, 15" Passive Radiator (Rear Firing)
    TWEETER:K-79-K 1" (2.54cm) Phenolic diaphragm compression driver
    HIGH FREQUENCY HORN:90°x40° Exponential Horn
    HF CROSSOVER:7000Hz
    MIDRANGE:K-57-K 1.5" (3.81cm) Phenolic diaphragm compression driver
    MID FREQUENCY HORN:90°x40° Exponential Horn
    MF CROSSOVER:650Hz
    WOOFER:K-48-E 15" (38.1cm) Fiber-composite cone
    DIMENSIONS:39" (99.06cm) x 18.5" (46.99cm) x 15.5" (39.37cm)
    WEIGHT:89 lbs. (40.4kg)
    ENCLOSURE MATERIAL:Medium density fiberboard construction (MDF)
    FINISHES:Walnut Oil, Walnut Lacquer, Oak Oil, Oak Lacquer, Finished Black
    YEARS BUILT:1987 – 1990

    I had to edit the specs on it, he has the II series and I couldnt find those specs! But I DID.....find the Original Klipsch Chorus specs......
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • weavercr
    weavercr Posts: 289
    edited February 2004
    I have the KLF-30

    FREQUENCY RESPONSE:
    36Hz-20kHz±3dB
    SENSITIVITY:
    102dB @ 1watt/1meter
    POWER HANDLING:
    200 watts maximum continuous (800 watts peak)
    NOMINAL IMPEDANCE:
    8 ohms
    ENCLOSURE TYPE:
    Bass reflex via dual rear-mounted ports
    DRIVE COMPONENTS:
    Three-way system using one 1" (2.54cm) polymer diaphragm compression driver tweeter with a 90°x40° Exponential horn, one 1.5" (3.81cm) polymer diaphragm compression driver midrange with a 90°x60° Tractrix® Horn and two 12" poly CG cone woofers
    TWEETER:
    K-79-K 1" (2.54cm) Polymer diaphragm compression driver
    HIGH FREQUENCY HORN:
    90°x40° Exponential Horn
    HF CROSSOVER:
    7000Hz
    MIDRANGE:
    K-52 1.5" (3.81cm) Polymer diaphragm compression driver
    MID FREQUENCY HORN:
    90°x60° Tractrix® Horn
    MF CROSSOVER:
    825Hz
    WOOFER:
    Two K-31-K 12" (30.48cm) Poly Carbon Graphite cones
    DIMENSIONS:
    45.25" (114.94cm) x 14" (35.56cm) x 16" (40.64cm)
    WEIGHT:
    102 lbs. (46.31kg)


    Denon POA2400a is 200 wps
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  • Airplay355
    Airplay355 Posts: 4,298
    edited February 2004
    114 here
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  • weavercr
    weavercr Posts: 289
    edited February 2004
    F1NUT

    Klipschorn are 104dB @ 1watt/1meter
    Lascala are 104dB @ 1watt/1meter

    and they have several that are 103. When you talk about dynamic range Klipsch speakers have polk beat hands down. I sill like my polks better. But when you want to crank it up and listen to rock and roll the KLF-30s are hard to beat. Everything else I like my Polks better. Their great to bring down to the garage when I have a pig roast and crank them up. I dont have any close neighbors, plus I envite them to the pig roast......I am on 4 acres in the semi - country with the suburbs slowly approaching.
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  • F1nut
    F1nut Posts: 50,654
    edited February 2004
    Weaver,

    I have no doubt that Kilpsch will play loud, but do you really listen at a distance of 4 feet? That's kinda like wearing headphones.

    The problem I have with that chart is the placement of speakers. Example, I have mine 5.5" from the back wall and 3 feet from the corner. The chart doesn't give you the option of calculating that measurment.

    This is as close as I could get with my set up.
    Speakers: 90dB
    Power: 475 wpc
    Distance: 6 feet
    # of Speakers: 2
    Close to a corner
    Estimate: 120.5dB

    Distance at 4 feet,
    Estimate: 124.1dB

    Using a SPL meter from the 6 foot distance I got to 115dB at only 10:30 on the volume dial. That's barely warmed up for my amp and loud enough to be uncomfortable.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • HBombToo
    HBombToo Posts: 5,256
    edited February 2004
    Originally posted by F1nut

    Using a SPL meter from the 6 foot distance I got to 115dB at only 10:30 on the volume dial. That's barely warmed up for my amp and loud enough to be uncomfortable.

    HOLY SHITE! F1 you'll be breaken windows at 11:30:eek:

    HBomb
    ***WAREMTAE***
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  • F1nut
    F1nut Posts: 50,654
    edited February 2004
    Hehe.....I don't think the SDA's can do more than 120-125dB, so I think it's safe. The glass does rattle though. :D
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Airplay355
    Airplay355 Posts: 4,298
    edited February 2004
    my glass rattles too but i only have i70s......must be that the speakers is a foot away from the window:p
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  • VR3
    VR3 Posts: 28,748
    edited February 2004
    My glass dosnt rattle...

    it flexes...

    IF you go outside and watch my window it actually is moving in and out...

    I play it loud, but its mostly M&K. Bass comes in (according to RS meter) at about...5-6db louder than the music. Which I don't believe
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Calverley
    Calverley Posts: 9
    edited February 2004
    Come on guys. We've all got SPL meters right. Let's crank it and measure - test the calc. My calc says at 75 wpc (Denon 1604) and average 90 dB for 5 speakers - 103 dB. Some day when the family is out, I'll check that!
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  • organ
    organ Posts: 4,969
    edited February 2004
    No SPL meter yet. Are analog meters more accurate than the digital ones?

    Maurice
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  • PolkWannabie
    PolkWannabie Posts: 2,763
    edited February 2004
    No ...
    Rick
    HT+ Sunfire TG IV, Dual CG Sig II's, CinePro 1K2, Oppo 981, Audio Technica PL120, Polk SRT's & F/X1000's, Samsung 71" DLP
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  • amulford
    amulford Posts: 5,020
    edited February 2004
    2 channel - at 100.2

    HT set - 110

    Just for S&G, i tried an actual at those sweet spots, and came up with lower readings.
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