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How much quieter will what be compared to what? As the baffle size goes up, generally you lose low-end torque but gain some HP on the top end. You also gain loudness as baffles increase in size.
The exception is Jamie's custom baffles (1.75 on the left with 3/4" reversion cone and 2" on right), which produce higher torque and HP numbers than even the larger conventional baffles. For example, the 1.75" were dynoed by FM at 87TQ and 75HP, while the custom baffles are 94TQ and 78HP.
Sorry I was not clear at all. I have 1.75 and was wondering what the differences would be with 1.5 thus making my wife and son happier with quieter pipes ... maybe????
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