I've tried the TC rig with one 10" cab and one 12" cab in the shop where I work and on a gig.
In the shop I have heard several other players with different styles and various basses.
At the gig there was another band using the amp, so I had the opportunity to hear it both from the stage and from the audience. I've even been on a gig where I was playing drums and I sat behind the speakers. In every instance the rig was fantastic!!!
I've tested it up against a lot of other amps including Mark Bass, Ashdown (My own), Ampeg, EBS and more. IMO it stood up against anything. It sounds different and it is a matter of taste if you like or not, but it really works. I liked it better than the Mark Bass....
I think it has a warm, full sound with a very good spread. My own cabs sound really good on some spots on the stage and really not so good at other. The TC sounded great everywhere with clean definition.
As a drummer it even sounded good from the behind because of the ports.
I couldn't hear the horn very much (If at all..) maybe the crossover frequency is very high... I play with old flat wounds.
And it is LOUD!
I'm a compressor-head. I have 9 or 10 of the best pedal compressors around and the ones in the Pod XT Live. The compressor in RH450 is better than any of them. Very clean, transparent, noiceless and musical. A lot of the bass players who had tried the amp in the shop haven't even noticed the compressor was on until I turned it off.
The linedriver really works. (It haven't worked probably in any of the amps I have owned)
The tuner is very good and easy to use. (I had to really concentrate on not looking at it though, as I was playing fretless at the gig ;-) Great to have the tuner display both on the amp and on the controller. I was playing a deep stage and I had the controller at the front of the stage.
The eq section works great and musical. I was able to trim out some unwanted resonances in the room without any fuzz and to add some "wood" to my frettless.
The preset came in handy as I was using two basses and the other guy was using a third. I would have like a few more presets (Maybe using the switch button to ad three more TC??)
The tube sim works up to a certain point adding a little grit to the tone. I think it sound artificial when you turn it up more than one third. Well if I want distortion, I'll use a distrotion pedal ( - From TC ;-)
I'm saving my money and selling (Some of) my gear to get the the Amp and two cabinets.
Kim