Just so that you know, there are 2 different types of Hella Supertones.

1) 85115 - Made in Germany. 118db with a rich tone. Regarded as higher quality, but
a bit more expensive.

2) 85315 - Made in India. 113db with an irritating tone. Quality not as great. Saves
you about $15 per set. These are the ones you can get on Ebay for $47.

If there is enough interest, I may be able to do a group buy, so PM me if interested.


Just for fun, here are some relative decibel readings:

180 Krakatoa explosion at 100 miles (160 km) in air [1]
168 M1 Garand being fired at 1 meter
150 Jet engine at 30 m
140 Rifle being fired at 1 m
120 Threshold of pain; train horn at 10 m
118 Hella Supertones - Germany
113 Hella Supertones - India
110 Accelerating motorcycle at 5 m; chainsaw at 1 m
100 Jackhammer at 2 m; inside disco
90 Loud factory, heavy truck at 1 m
80 Vacuum cleaner at 1 m, curbside of busy street
70 Busy traffic at 5 m
60 Office or restaurant inside
50 Quiet restaurant inside
40 Residential area at night
30 Theatre, no talking
10 Human breathing at 3 m
0 Threshold of human hearing