AVS Special Member
Join Date: Mar 2008
Location: Australia; now run by adults.
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I have 4 of the GTO1514 either here or on order and am going to use them sealed. A 2 second sim shows they need about 105L each for a Q=0.707 sealed. You could go smaller and use EQ to get the desired response.
Ported needs a larger box: 200L and a 20Hz tune looks good for a first try.
How big can you go with the box size, how big is your room and what results are you looking for? You need to define where you're going to actually get there. Box volume is easily determined by deciding on the size you can go, LxWxH in cm, then divide by 1000 to get volume in litres. More accurate is to take the cabinet thickness off before multiplying; if using 18mm, then remove 3.6cm from each dimension first. None of it is particularly difficult but usually takes a couple of iterations to home in on a final design.
Mine will be in two dual opposed enclosures, one driver near the floor in each, the other at half wall height in about 180L net.