What is :DIN i.e.Low-Frequency Extension 43 Hz

I have seen some speakers rated i.e:

Low-Frequency Extension* 43 Hz (DIN)

What does DIN stand for?

Thanks

bokfudo02-19-2010 11:59pm

kijanki Details Discussions Posts This discussion Message User 4,428 posts 02-20-2010 at 05:19am Copy Comment URL Report Comment Edit Delete Deutsches Institut für Normung (German Institute for Standardization) Audio is covered by DIN 45500.
hifitime Details Discussions Posts This discussion Message User 715 posts 02-20-2010 at 04:11am Copy Comment URL Report Comment Edit Delete Its a European standard.I can't remember +-how many db.Somebody else may have better info.LINK>>>[http://en.wikipedia.org/wiki/Deutsches_Institut_f%C3%BCr_Normung] by Hifitime