Originally Posted by JimmyM
The cabs that Vintage Blue and Fliptops makes are based on the earliest B-15 double baffle cabs, which are tweeterless and don't go quite as low as the PF cabs. The PF115lf goes super low, too. Their speakers are custom made for them by Eminence.
The Greenboy cabs I have not played, but Greenboy is my bro and I have nary a bad word to say about him or his cabs. The 15sub I don't think is meant to be a standalone cab, though. Pretty sure it's built to be a low end supplement to the regular fEarful 15/6/1. He does have a standalone 115 but I forget what it's called. Bassic, maybe? Very nice stuff made with neos and designed to be as light as possible. Can't get one for $400, though
+1 to all of this.
The PF-115lf is my favorite ampeg cab in production right now. I wouldn't consider it a extension cab, as I would not pair it with the sealed 115he or 210he. I like the way it sounds on its own, or even better two of them.
As Jimmy said the 15sub is not a stand alone cab. It is ment to be paired with on of the mid loaded fEARful cabs. greenboy does have a 115 that is a full range cab, the Bassic15 (there is a 112 version as well).
So what are the differences between the PF-115lf and the Bassic15?
Weight - The Bassic uses lighter wood and more intensive construction. It also uses premium neo drivers which shed weight.
Power handling/sensitivity - The Bassic can be ordered with either the Kappalite 3015 or the Faital 15PR400. Both are really good drivers, that have good displacement for full range drivers, better than average sensitivity, and due to the smaller magnets they she heat a bit better than some drivers. The 115lf uses a good Eminence ceramic driver. I have never been able to push one to see how it sounds closer to its limits, but it does have a pretty good old school thump to it.
Tone - The 3015 has a rise in the upper mids that some people like. Gives it a modern/muscular sound. The 15PR400 sounds more old school, smooth through the mids, but has an amazing amount of high end extension. The driver in the PF-115lf does not sound as beefy, but has its own appeal to some. It goes low enough and high enough with out being honky at any point.
So which is better? That is up to you, and what you need/what is important to you. On a budget? the PF-115lf is among the best commercially available 115's, and its afordable. If the budget isnt as big of a concern, the Bassic is going to be lighter, handle more power, and get louder... But you are not going to get one for $400 either.