Hello All, Looking for some experience here. Right now I have 1 cabinet, an custom 2.25 ft^3 sealed enclosure with an Eminence CA154. I really like it because I like the sound of a sealed cabinet, it's super portable (30 lbs and easy to cary with one handle), and reasonably loud. However, I have two problems. One, I need a little more volume. Two, I feel like it doesn't go low enough. Modeled in WinISD the -3db rolloff is at 80 Hz, and the -6db rolloff occurs at around 60 Hz. When I hit the low E, I can tell it's missing something as the fundamental occurs at 41 Hz. It's most noticeable when hit an E and then an A after for comparison; you can clearly hear the strong fundamental of the A. What I want to do is add a second cabinet. I could add another identical custom sealed enclosure, but I was thinking about a ported 1x15 or 1x18 for some extra low end extension. I know that mixing two different types of cabinets is usually seen as a bad idea, but I was wondering if anyone has heard this combo in person? Ideally if you've heard 1x15 sealed and 1x15 or 1x18 ported at the same time that would be cool, but if not, any combo of ported / sealed I would be interested to hear about. If it matters at all, I'm running my bass through a sansamp vt bass di into a carvin poweramp. I was also thinking about doing something crazy, like maybe running just the vt bass into one side of the poweramp for that ampeg distortion into the sealed 15, and then one side into a cleaner preamp to go into the ported 15 or 18. Would that work, or would I be introducing some other weird phase issues? Thanks in advance!