Anyone use a sub with Reference 3A DaCapo i

thanks for the replies....I haven't tried tube rolling, any that you would suggest? My listening position is from 6 to 7'away. The speakers are firing down the long walls, however there are more room problems. There is an alcove where the front windows are located just behind the speakers. There is also an area to the side that opens out a bit so the room is not a perfect rectangle (at all). I'm also investigating the possibility of getting higher stands- I have Sound Anchor stands that are 24" high. I don't know if this would affect the bass but over all it might sound better (Ref 3A makes adjustable stands to 30" high).

Thanks for the suggestions.....I am constantly adjusting the placement of the speakers, toe in, distance from listening position, distance from each other, the back wall etc. with some effect but nothing dramatic. I tried raising the speakers but the only solid objects I have to put them on are a little too high I think. I recently got a Mapleshade catalogue that has speaker platforms that they recommend for monitors that basically have them on the floor tilting upward. Anyone tried this?

Re: other suggestions- 1)I'm a renter and can't do the dedicated line although I'm sure it would make a difference 2)I'm using a Harmonic Technology power cord on the Cd player and a DH Labs cord on the amp. Also Harmonic Tech interconnects. I'm sure these aren't the best but I imagine they are pretty good. 3) I've been using Totem bi wire speaker cables, also recently trying Nordost Blue Heaven...not much difference to my ears.4) I have a Zoethecus stand but would like to try to iso devices...