I'm not quite deaf although my kids think so. Do any of the docks -speakers have the capability to increase the volume of the phone ringer? I may be in another room and want hear when the phone rings.
Are you using the stock ringer? Not sure if you have the ability, but I take some mp3 sound clips and raise the volume using a sound editing program. I raise it to just below the clipping level, then convert it to aac in iTunes then change the extension to .m4r.