SPL Rating for SA-12?

[audioholic 5,000+ posts]

Sensitivity specs are irrelevant because they are measured at 1khz. How many people here play their subs up to 1khz, raise your hands. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

The reason even a realistic sensitivity measurement would be useless is, hoffman's iron law tells us "high sensitivity, good low end response, small enclosure... pick two". So extrapolating that logic tells us you can use an inefficient sub, with good LFE, in a small box... or you can use a high efficiency sub with good LFE in a large box. Final efficiency will level out, and other factors such as input power available, cooling ability of the speaker, and enclosure tuning versus freq of the material being played (and inductance) become the more dominant factors. Efficiency of the raw subwoofer really means very little to final performance in terms of potential maximum output.

 

[pro-rabbit 5,000+ posts]

Sensitivity specs are irrelevant because they are measured at 1khz. How many people here play their subs up to 1khz, raise your hands. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
The reason even a realistic sensitivity measurement would be useless is, hoffman's iron law tells us "high sensitivity, good low end response, small enclosure... pick two". So extrapolating that logic tells us you can use an inefficient sub, with good LFE, in a small box... or you can use a high efficiency sub with good LFE in a large box. Final efficiency will level out, and other factors such as input power available, cooling ability of the speaker, and enclosure tuning versus freq of the material being played (and inductance) become the more dominant factors. Efficiency of the raw subwoofer really means very little to final performance in terms of potential maximum output.

Me Me Me...I do....//content.invisioncic.com/y282845/emoticons/bigwave.gif.16324171cad2db62cf4f16568b038478.gif

Naw I don't just wanted to be cool for a sec... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

This is exactly right and in many cases will spill over into other t/s specs as well, but that is a whole other conversation.

 

[audioholic 5,000+ posts]

Me Me Me...I do....//content.invisioncic.com/y282845/emoticons/bigwave.gif.16324171cad2db62cf4f16568b038478.gif

Naw I don't just wanted to be cool for a sec... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

This is exactly right and in many cases will spill over into other t/s specs as well, but that is a whole other conversation.

I agree. I dont claim to be an expert on speaker design, or t/s specs... but Ive ben around the game a while now, and Ive learned that far too often individual specs are obsessed upon to the point of rendering them completely useless. Remember the xmax wars several years ago? A perfect example of focusing too much emphasis on one individual spec, and losing sight of the bigger picture. T/S specs are relate to each other, and any one spec like xmax or efficiency cannot be focused on, in a vacuum, and expect realistic conclusions.

Read T/S specs. Read them again. Then when you are done with that, read them again. Then, the next time someone posts some info that you understand and relate to one spec, go back and reread them all, and try to realize how your new found understanding of one spec affects others as well.

 

[audioholic 5,000+ posts]

Sensitivity specs are irrelevant because they are measured at 1khz. How many people here play their subs up to 1khz, raise your hands. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
The reason even a realistic sensitivity measurement would be useless is, hoffman's iron law tells us "high sensitivity, good low end response, small enclosure... pick two". So extrapolating that logic tells us you can use an inefficient sub, with good LFE, in a small box... or you can use a high efficiency sub with good LFE in a large box. Final efficiency will level out, and other factors such as input power available, cooling ability of the speaker, and enclosure tuning versus freq of the material being played (and inductance) become the more dominant factors. Efficiency of the raw subwoofer really means very little to final performance in terms of potential maximum output.

Id like to make one correction, after rereading what I wrote here. Efficiency will not level out, as in put one high efficiency sub in a large box and expect the same efficiency as an inefficient sub in a small box. The lower efficiency, smaller box sub will require more power (watts) to perform the same output level. I should have said potential output will level out (albeit one will require more wattage than the other does).

 

[Ninesvnsicks 10+ year member]

I was just wondering what the spec was so I could enter it in winisd and also to compare to other subs. I'm not using it for anything really idk why u guys are bugging out about me just wondering what it was lol.

 

[sundownz Pro Seller]

Cool feature of WinISD is cross-calculate -- if you entered the other specs the Sensitivity would come up //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Ninesvnsicks 10+ year member]

Cool feature of WinISD is cross-calculate -- if you entered the other specs the Sensitivity would come up //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Some reason it didn't not sure why.

 

[sundownz Pro Seller]

Some reason it didn't not sure why.

Which version do you have ? I run the "Pro Alpha" version