When I did mine, they sounded pretty good to me. I ended up selling mine and then I tried a pair the pa310s in this box and it seemed even better. SA-212 E - 2x12 Empty Guitar Speaker CabinetZombie thread, I know.
I have had two PA310 12's sitting in boxes for years now. I have a design for a cab for them, but I'm unlikely to get it done before winter, so I looked a little more closely at this, just so I'd have a cab. It's a long story, why I don't have a giggable bass rig right now.
The cab itself comes out closer to 1.3 ft^3 when you've deducted the volume the port takes up and the volume the speaker takes up. Tuning comes to 52.1 Hz in WinISD. The Transfer Magnitude curve looks nice. F3 comes out at around 56.66 Hz, which is not too bad at all.
I've weighed all of the things that Aged Horse said about the shortcomings of going this route but ordered the cab and all of the fixings yesterday. Since I am looking at this as a short term solution and I can reuse a lot of the parts, it seemed like a good route to go, despite the acknowledged negatives from Aged Horse.
Hdwr
1x grill holders 7.44 Home
1x grills 9.29 Home
1x corners 8.49 Home
4x Feet 1.48 Home
2x handles 9.18 Home
1x cab 60.98 Home
Total with cab 96.86
Total w/o cab 35.88
Less than $100 for the cab without the speaker is not bad.
1x PA310 109.98 Home
A little over $200 for the works for a somewhat complete 1x12 cab. You'll want to swap out the jack and you'll need screws and maybe a few more items. Again, Aged Horse is correct - it weighs too much and won't tolerate getting wet, but I have most of the other parts, can reuse a lot of the stuff I just bought and I'm looking at this as a short term solution until I build the cab I actually want.
KO
I now have them in completely custom built cabs. I have 2 212s and I did a 210 also.