The cabinets are very clean. I played orchestral recordings, movie soundtracks, video game soundtracks, folk music, and popular music. The cabinets are almost omni directional. I could distinctly hear every instrument, from the slightly out of tune piccolo down to the timpani mallet striking the head. String basses and cellos sound very nice. Vocal and folk-type music recordings are wonderful. The sweep tests appear to prove the cabinets are doing their job, from lows to highs. The lows, although very crisp, aren't the same lows I'm used to hearing out of the Titan48, but then, the Titan 48 is bigger than both Omni15s, and has two HL-10Cs.
The JBL had more "punch" in the lows, but the three way JBL has an 18" woofer, and the equivalent cabinet cost (discounted) almost $1,700 each. The JBL lacked the clarity of the Omni15s, and seemed more "directional," if that makes sense.
The TB15 worked very well as a bass guitar cabinet, and was not harsh at all. Very pleasant. The larger bass cabinets I use include a Trace Elliot 4x12, and an Ampeg 2x10 cabinet, and (of course) the two DR250s, two Tuba24s, and the Titan48. As a bass cabinet, the DR250/Titan48 overpower most everything, but I need a ramp to get it anywhere. These TB15s are quite light (JBLs are not light).
I like the TB15s, and think they will work out very well for their intended purpose. I ended up putting them on dollys (instead of casters), and not only are they more stable than if I mounted casters, but they have built-in bumpers for when the students push them around.
Leland has been most helpful throughout this process, not only for great prices, but for helping me out with my first attempts at crossovers. Thanks, Leland!
Now I need to learn the basics of mixing sound.
Mark