so I bought an air compressor and tried to fill up my airzound bike horn. It wont put any air in the horn, im not sure if I have the correct fitting. I can feel air pressure coming from the fitting so thats not a problem. It just wont fill up the airzound. Im sure ill have the same problem when trying to fill up bike tires. This is what I have, if someone could check the pics out and tell me what im doing worong that would be great.
https://i1119.photobucket.com/albums/...ps0f12588b.jpg
https://i1119.photobucket.com/albums/...ps4e2af1cc.jpg

I have a 12 volt (car) air compressor (with pressure gauge) that I use regularly to fill up my air-zound. It works great.

If the head you have doesn't fill a regular schrader valve, then yes, it won't fill an air-zound either. I can't tell from your picture exactly what head you do have.

Do you just press it on and it fills right up instantly? I try to press it on and the air flow stops. If I release pressure a bit I can feel the air squeezing out

I'm wondering if this would work
https://www.mec.ca/AST/ShopMEC/Member...ve-adapter.jsp

The adapter converts a Presta valve (aka, French valve) TIRE TUBE to work w/ a schrader valve (aka, automotive/gas station valve) PUMP.
Would be a waste of money, UNLESS you have a high end mountainbike/roadbike tire that you want to be able to fill up at the local gas/petrol station (not recommended).