Bergantino hd112 paired with Bag End s15b-d?

You're taking a big risk in hoping that a BE15 will work with your Berg. Personally I can't see it working too well. Get another HD112.

 

If you are indeed talking about the S15B-D (5 cubic feet large), then you will certainly add a gob of strong low bass. I have two of them and IME, they are the only 115 cab that Ive ever had or heard that "mixs" well with other cabs. But it is huge and somewhat heavy at 70lbs so Im not sure you'ld gain any advantage in terms of weight and size. Great cab though and you may like it all by itself too.

 

I've used more than a few but at the moment I'm using a PA power amp with the Mesa Subway DI and I love it.

I havent gigged the big cabs in quite a while as I prefer to use the smaller Bag End cabs though they don't bring the big bottom that the larger cabs do.

The large cabs bring the nuance of playing behind a large PA with multiple subs all on their own.

Let me add that I feel it's very important that the Bag End cab have it's original driver, always be sure to check when buying a used Bag End cab.