I'm so tired I can barely type, but thought I'd throw some thoughts out here. I am stunned by how good this setup sounds. There's still a ton of richness, but with more clarity and note definition, and with extended lows. One of the telltale differences was on ballads. Often I'll play those up near the neck of my P bass. With the EV's this was just too thick, and the notes had little definition. With the 3015's, the tone when played that way was solid and articulate, but had the mellowness and richness I was going for.
So, I was using just about the same settings on the B1500 as before: eq flat except a bit of cut on treble and sub bass, drive and volume both starting at about 10:00. I did end up cutting the volume a bit, to 9:00, as these seem louder than they were with the EV's. They did the pants flapping very nicely, and I could really feel the bass vibrating my legs as well as hear it.
This is a killer combination. The cabs are different with the 3015's. They retain the same basic character, but are a tiny bit more modern sounding, mostly due to the added extension and clarity. But it's sort of a "vintage modern" if that makes sense, because they are still so rich, warm, and with such great mids. To me, they're just about perfect for what I do, which is mostly classic rock, southern rock, blues, and country. But I can also see using these for jazz and fusion such as Weather Report, Return to Forever, Tribal Tech, etc. For more modern tones, Marcus Miller and other sizzly slap stuff, not so much, but you knew that. They're also each about 12 pounds lighter, which really puts them into a different category. Load in and out was very noticeably easier.
I love these cabs, and this head. I am still very much wanting to try the Hartke LH500 more in depth with the cabs. And I'm also going to run a Carvin BX500 through its paces. But the B1500 is a wonderful thing with these TL606/3015's, and with the superior power handling of the drivers, this setup could be used for some very loud situations. Robert Reynolds of the Mavericks has taken an interest in one of the guys I play with, Ryan Weber (country / southern rock), and is helping us book a ton of shows. I'm going to be doing some outdoor shows at rodeos starting in August with him, as well as a lot of casino circuit stuff. These cabs will be with me when I do.
Okay, enough rambling from me!
Cheers,
Liam