MickyMcD Posted September 22, 2007 Report Share Posted September 22, 2007 If I am correct, the calculation is not taking into account the inefficiency of the coil based loudspeaker. According to Wikipedia (and backed up by many sources); Most loudspeakers are actually very inefficient transducers; about 1% of the electrical energy sent by an amplifier to a typical loudspeaker is converted to the acoustic energy we can hear. The remainder is converted to heat, typically in the voice coil and magnet assembly. The main reason for this is the difficulty of achieving proper impedance matching between the acoustic impedance of the drive unit and that of the air into which it is radiating. What that is saying is that loudspeakers are extremely inneficient and do not work in IH8PunkRok's calculation. Those calculations are in reference to a 100% effiecient driver. Cheers, Mick Quote Work;DiGiCo D1 Live / MIDAS Heratige 1000 / MIDAS VeniceMeyer Sound CQ-1's, CQ-2's, PSW-2'sRAMSA Monitor AmplifiersP.Audio MonitorsBSS OMNIDRIVE and SoundwebDBX 231 and Klark Teknik DN360 EQ'sRCF TT22ARCF ART320 Link to comment Share on other sites More sharing options...
IH8PunkRok Posted September 22, 2007 Author Report Share Posted September 22, 2007 yea thats prolly true but the calculations on the website were based off of volts goin through a 600 ohm resistor so isnt that fairly inefficient? but yes everything else is based off of perfect conditions however its nice to see someone who can talk smart with me Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
rusty959 Posted September 22, 2007 Report Share Posted September 22, 2007 Also from the little I have read (it is late and I have a headache, just got back from a football game) you are speaking in terms of inside the box, or not even that, all of the energy put into one space, a speaker will put the energy on both sides itself. Then I kinda doubt a speaker box lets out all of the energy it has put into it... not completely sure on that one, just some thoughts that I had. I might look over the math tomorrow, I would say I am pretty decent at math. Quote 2013 Subaru BRZ12" Orion HCCA on AQ 22001967 mustang restoration project: http://www.stevemeadedesigns.com/board/topic/110765-mustang-restoration-build-2011-edition/ Youtube: https://www.youtube.com/user/therusty959 Link to comment Share on other sites More sharing options...
IH8PunkRok Posted September 22, 2007 Author Report Share Posted September 22, 2007 eh i give up on this thing it appears to be a slight bit over my head cause i really dont know wut im lookin for lol Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
99GPGTX Posted September 22, 2007 Report Share Posted September 22, 2007 im not even going to attempt to comprehend this thread Quote Currently: 2015 Evo X WW Forgestar F14 18s --Rally Armour Mudflaps ETS 3.5" FMIC, CAI, Open Dump DownPipe, Test Pipe, Ultimate Racing Catback, BLEVINS TUNE, Fortune Auto 500 Coilovers Build: Crescendo Mezzos x2 Crescendo 800.4, 1500.1 Loaded Fi Q12 Second Skin Pro XS D5100 RF 360.2 Sky High Audio Wiring Need: ALTERNATOR! PREVIOUS 1999 Grand Prix GTX 3.8L S/C-few modsWheels: Ruff Racing 280 19x8.5 Sub: Fully Loaded 12" Fi BTL Amps: Autotek MM3000.1d Sundown SAX-100.4HU/Tweets/mids: Alpine D310 + H701, TBI HDSS tweets, Mpyr audio 65m x4extra sheit: knukonceptz 0, 4, rcas, speaker wire EA 200amp alt HC 2400 TEAM DEADLY HERTZ!! Financial Consultant- Charles Schwab Link to comment Share on other sites More sharing options...
IH8PunkRok Posted September 22, 2007 Author Report Share Posted September 22, 2007 lol see wut its like to be me? confusing stuff Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
MickyMcD Posted September 23, 2007 Report Share Posted September 23, 2007 The calculation you are using appears to be the calculation for energy released into a point source. There are too many variables involved with sound reproduction to accurately use that calculation in a normal environment. The efficiency of the drivers, the dispersion pattern, size/shape/volume of enclosure, type of enclosure etc etc. Best to stick with what we all know works methinks. Cheers, Mick Quote Work;DiGiCo D1 Live / MIDAS Heratige 1000 / MIDAS VeniceMeyer Sound CQ-1's, CQ-2's, PSW-2'sRAMSA Monitor AmplifiersP.Audio MonitorsBSS OMNIDRIVE and SoundwebDBX 231 and Klark Teknik DN360 EQ'sRCF TT22ARCF ART320 Link to comment Share on other sites More sharing options...
IH8PunkRok Posted September 23, 2007 Author Report Share Posted September 23, 2007 yea i agree ill just go wit wut the mic says Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
Chode69 Posted September 23, 2007 Report Share Posted September 23, 2007 best bet let the physics do the math and let the mic do the reading...all that i need haha Quote NoFearX18 said: Nick will bang just about anything.....LMAO....pun intended On 4/13/2010 at 9:51 AM, meade916 said: i was like DAMN, Chode is hardcore! he makes james look like a friendly person LOL! trainman0978 said: I dont know who is worse with the buttholes Chode or Big P... Team Deadly Hertz / Team DC Audio / Team XS Power 2010 DC AUDIO MEMBER OF THE YEAR!!! DuckretaryFEAR THE DUCK Durangho Chodes Blowthrough Build Youtube vids Muh Wife Need DC Audio? Hit me up for pricing!!! Link to comment Share on other sites More sharing options...
Guest Nismofreak Posted September 23, 2007 Report Share Posted September 23, 2007 Dam I am in geometry and chemisty honors...haha o well.....NERDS!!!!!! Quote Link to comment Share on other sites More sharing options...
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