The DB750 is my favorite tone to date. Now, I'm using an RH450, which has been great and can get relatively close to the DB750, but it sounds to me that the SL can get even closer.
One complaint that I have about my RH450 is the lack of sparkle on the high end due to the 5k LPF for that sealed cab vibe. That sounds great in a lot of circumstances, but is really limiting on those new-skool R&B gigs I do where I need a little more scooped modern tone. I've been waiting for an RH450 update, but it seems the SL might just be what I'm looking for.
Unfortunately, the SL vs. RH450 thread was closed, otherwise I would have posted there. However, which one of these lightweight heads sounds more in the heavy weight range? The RH450 has all the power I personally will ever need. What benefits would I get from getting the SL900 over the 600 as compared to the output of the RH450? IOW, does the 600 have the same relative output as the RH450? And will I lose that "note heft" with the 600 as compared to the 900?