I'm currently using a BFD 1124 to equalize my SVS PB-13U. I prefer a house curve to a flat response as I listen to a lot of music. I also like the ability of the 1124 to store up to 10 different curves so that I can experiment with different curves and do A/B comparisons. I'm likely adding a second SVS PB-13U to smooth out the response in my room and increase my headroom. I was planning on adding a second BFD 1124 for the second sub, but thought I better check with the more experienced folks here to see if there is a better way of equalizing the two subs and keeping the ability to create house curves.