I'm running (1)- 88120 dvc off a jl 500/1 in a ported box right now (1.6 cf 32hertz tuned) and it sounds good ported to me. I've also got (3) 88120 dvc titanium's that I've in the same box driven by a jl 1000/1 and it sounded the same as the aluminum just louder. I have (2) 8808 dvc as well I was running them in a .75- 1 cf (don't remember for sure) 32 hertz tuned driven by a jl 500/1 Give it a shot both ways you might be surprised. I used a pencil and paper to find "optimum" volume and ran with it. >"Advanced Speaker Systems" by Ray Alden >Vb= 15Vas(Qts)^2.87...................Where Vas = F^3 I've always been a fan of smaller boxes, but damn the port length is long. I think they're great sounding subs. here's the T/S parameters if you don't have them already. Fs.> 26 hz. Qts.> .47 Vas.> 2.1 > typo in the manual, it says f^2, not cf^3. spl/w/m. >84.9db Qes.> .513. Qms.> 5.6. Sd.> .0357 m^2 sealed enclosure (recommended) as per the eclipse manual. 1.0 cf> Q .81> f3 40 hz.> Fc 45 hz.> ripple .27 db. .75 cf > Q. .91> F3 42 hz. > Fc 51 hz. >ripple .74 db. .5 cf > Q 1.0 > F3 46 hz. >Fc 60 hz. >ripple 1.7 db. I called eclipse and asked for a recommended ported box size( a long time ago ), they told me it wouldn't sound right and they don't recommend it. I tried it anyway (had to see for myself) and it sounded the same but with more output. I believe it has linear spiders not progressive spiders.