Is 5.4x VAS acceptable ?

[rms8]

Hi all.

Putting 8 Fi318's in room. 4 up front and 2 each in each rear corner. The rear corner enclosures are ~145.8cuft each. Each corner will have two 318's. This equates to roughly 5.4x VAS. Is this too little? Will I suffer any issues? Would loading the "enclosures" with batt-insulation help ?

Thanks,
Rob

[gworrel]

Per the FAQ, anything over 4x VAS is acceptable. The main effect is more amplifier power needed to push the drivers to xmax. You can easily see the trade-offs if you model the system in Winisd. The Q of the system is raised in a smaller enclosure, but this may be moot with EQ. Batt insulation will help to lower the Q.

[rms8]

Since an IB enclosure is so large, to what degree should one fill it with insulation to be effective/make a difference? Should it be completely loosely filled or packed???

[ThomasW]

Stack, do not compress the insulation