If like me you want a standard looking horn the acumen ones are good. I got one from these people on ebay http://www.ebay.co.uk/itm/Acumen-Motorcycle-12V-Extra-Loud-Replacement-Horn-/261103345031?pt=UK_Motorcycle_Parts&hash=item3ccaf8dd87They are stamped 105db but rumor is they are about 115db. also comes in a nice tin
I just found a review on mcn that pretty much slates it for anything bigger than a 125 and people saying the poem was better .Too late for me cos it's already ordered. I have a sound meter so will check what the original puts out before swapping and post results.
Sound waves are a funny thing though. the frequency can have as much affect as the amplitude of a sound.When i tested my new acumen in the garage my girlfriend said she could hear it in the house much louder than the original.For example big fog horns have a bassy tone because it carries further than a high pitch tone.heres a thought Clayt do some distance comparisons if you can and possibly sit say in a car with the DB meter before and after?Lets get all mythbusters about it lol