Speakers sound better with some sort of box behind them - i had a 6x9 in my house hooked it up to a stereo to test it and it sounded shit, i was well dissapointed, until i put it into my upside down hard hat from work and it sounded 100 times better! think you should mount them with some sort of 'space' behind like a small makesift box or something - maybe outta balsa wood so it aint heavy!!