Based on what? Please advise the power levels in Decibels (dBa) and distortion levels at what frequency range being measured. Its NOT a sole function of speaker impedance to device or wire size, or air density, or degrees of spark advance, or ported or manifold vacuum source....and not what is a perceived listening level, but using actual measured figures. Unless of course the methodology used to make the determination is based on the next door neighbor's cousin's sister's husband's best buddy's friend's determination down at the local watering hole on Tuesday...or, how high is up principle.....or not.....just talking out loud....
BOB RENTON