Isophon PSL 300-70

Is there a better way to use this 12" woofer, than obvious 75 l sealed box. Bass reflex calculator gives 150 l vented box. Spec:
Fs....24 Hz
4 Ohm/ 2,8 Ohm min
Vas....160 l
Qm/Qe/Qt.....1,86/0,51/0,4
1,o T flux
46mm... D voicecoil
92 dB/W

Some tlml or tqwt ?
 
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Tnx p10... I'll have them measured for complete spec , but want to start with 74 l sealed, Qtc=0,707... and try variovent . Any advantage to start with bigger sealed box, 90l perhaps ?
I considered Faital 3fe22 or 3fe25... or Fountec fe85, ...both not expensive, Faital seems better for higher sensitivity....