I'm posting via iPhone so will get around to uploading pics next time I'm on my laptop. 

I bought cheap helmet speakers off eBay from China for about $6 delivered. They are soft, flexible and come with a long cable with a volume adjuster. The only problem with these is that when cruising over 100kmh the wind noise with an open face helmet drowns out the sound. I pulled the lining out of my helmet to install so it's neat without wires running everywhere. Wire runs neatly out the back. 

I then bought a small battery powered amplifier off eBay for about $15 delivered. It takes one aaa battery and will work for ages on that. It's about 5 cm long, 1 cm wide and very thin in depth. It boosts the sound of the speakers by about 15%, making music loud and deep enough to enjoy, even with the wind noise at 100kmh+. This runs between my iPhone and the speakers. 

Next I bought a rechargeable battery powered wireless bluetooth receiver. Around $17 posted via eBay. I had two of the cheap eBay ones but neither worked. So I payed $50 for one that also transmits, from jaycar. It's similar size to the above amp but slightly wider. It comes with a cable to charge via usb input. It pairs and works easily with my iPhone. 

I bought some Velcro from a hardware shop. I fastened the Bluetooth receiver and amp to the outside of the back of my helmet via the Velcro. It's nice and secure as the amp and receiver are only very light. If you ride in wet conditions use marine Velcro. I considered magnets to fasten but Velcro will be safer over bumps. I wanted fastening that enabled easy removal for charging and replacement of batteries. 

My iPhone sits in my pocket or on the tank. It pairs wirelessly to the Bluetooth receiver on the back of my helmet. A short line runs from the receiver to the amp next to the receiver. The amp runs the line input and the speakers run into the output end of the amp. 

It's very neat, easy and cheap. And you can also use your navigator function of your phone. But if using an open face helmet you will want one that fits tight and well to minimise wind in the helmet that interferes with the audio sound. 

 

 

 

 

Balloff, I had a good laugh about you walking around talking on the phone with people thinking you're a lunatic!

I decided to use my ipod and ear pieces recently on the way back from Edenhope.  I have an open face, and there is plenty of room for the ear pieces.   Sound works well but you gotta have the volume up a fair bit while riding, but it's a pain in the arse if you dont have any sort of volume control on the headset wires, especially when you're stopped in traffic, you just about go deaf if you're not careful.  It's not easy when the ipod is in your jacket breast pocket & wearing gloves at the time though.

I have molded ear plus from Earmold... http://www.earmold.com.au/Recreational-Stereo-Headsets/View-all-products.html

Purchase in 2007 for around $220, but think there around $300 now

 

I considered these but they do too good a job of blocking out external noise. I still wanted to be able to hear some outside noise for safety reasons and peace of mind that my bike is running ok.