I finally got my CS1214's finished and installed yesterday.
I put them up front where I used to have two UM-18s in the 4cuft packs. I moved the UM18's behind the only row of seating.
Well they act like they do in WinISD; drop like a rock below about 40Hz. How do you guys get 20Hz out of these? More than 8 of them?
They are more sensitive than the UM18's. The knob on the NU6000D dedicated to the CS1214's is turned down quite a bit from the NU6000D driving the UM18's.
The drop off below 40Hz worked out because of how I wanted to cross these subs together with the mains and UM18s. The mains are crossed to the subs at 100Hz. The CS1214's take over from 100Hz down to 40Hz. From 40Hz and below is the UM18's. Although I need to play with it and listen more, this setup puts most of the bass up front and the tactile (UM18's behind me) in the 20Hz-40Hz range which seems to be working out just right. Explosions and other LF content is tactile. Closing of car doors is not. That's what I wanted. Tactile bass where, IMHO, it belongs, down low.
These were a booger to blend. I started by turning off the UM18's amp and concentrated on blending the CS1214's with the center channel. I ended up with nulls popping up. I did the best I could and then started blending the UM18's with the CS1214's. More nulls. Adjusting the distance for the subs only shifted the nulls around. Once I changed the 40Hz crossover between the CS1214's and UM18's to 24db/oct in the nuke (I started with 12db/oct), I started over and things got a lot better. I guess it's such a narrow frequency band down there that unless you have a steep filter, both the CS1214's and the UM18's interact with each other and the mains. Anyway, I got it smoothed out pretty well.
I lost content below 20Hz because of re-positioning the UM18's. I guess I had some boundary gain with them up against the front wall. They're flat to 20Hz but drop hard below that. I'm ok with that but it was nice to see an REW graph with content below 20Hz. Bragging rights at least
I was hoping for more chest-slam out of the CS1214's and I'm not getting it. I thought the lower cone mass of the CS1214's and more cone area would help that but I'm not getting it. I'll play around a bit more but doubt that there's anything else to do.
I'll play and listen some more. I think I like it the way it is. The alternative is to put the UM18's back up front and put the CS1214's behind the sofa. The rub with that is that I don't want tactile response too high in frequency where it'll be over-used and gimicky.
Subjectively, so far, I like the sound of the bass I'm getting. The UM18's are far from one-note-wonders but for music, the bass (like bass guitar) sounds more defined with the CS1214's up front. I'll have to listen to more content that I'm familiar with.
So far, I like them. I didn't get a "wow this is so much better" experience but if after more listening I like the quality of the bass better, then it's a win. At $29/driver, it's an inexpensive upgrade.