altec 604-8g in pi enclosure

hi wayne
i recently picked up a pair of 604-8g drivers. they were originally in 3.5 cu ft vented boxes designed for soffit mounting andn in free space the bass rolled of starting at 150 Hz. any suggestions as to a pi aligned box. i'm thinking of a ported design in the corner. t/s parameters are as follows for the 604-8g
fs: 28 Hz
Re: 7 ohm
Qts: .25
Qms: 8.3
Qes: .26
Vas: 624L
Xmax: 3.8mm

thanks all

bob

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