Well, my D800+ came in today and I had just a few minutes to try it out at the shop, so this first review will be cursory. I played an F Bass Norm Stockton Signature bass through the D800+ into a Bergantino HDN212 cab (the cab I'll be using with the amp most of the time). One thing is clear about the amp right off the bat - it is versatile. I was able to get some nice classic rock tones, rich in low mids and lows, then EQ it into a more modern J bass sound using the high mid control mostly. The Voicing knob helps with that. The EQ controls are very responsive, so this isn't one of those amps you have crank the EQ to 5 o'clock to hear a difference. All the knobs have excellent knob feel (Youtube: "knob feel review"). The HPF, Deep and Bright switches add instant tone modification along with the Voicing knob, which I like at about 9 a.m. The front panel is festooned with switches and knobs, and the back hosts a slew of quarter-inch jacks, more switches and the Neutrik Speakon output jacks. I can see why some might prefer the simpler D800. The D800+ is, however, what I was hoping for tone-wise and feature-wise.
I'll report back after I've had some time to ring it out more thoroughly. I do have a couple observations about the form factor. First, I went to open the box and immediately was confronted by this:
Fortunately, I have a small butane torch that I used to carefully burn off the tape. Another minor niggle I foresaw when I first saw pictures of the amp is that the gain and frequency controls for the semi-parametric mids are not easily differentiated. I plan to put a white dot on each of the frequency knobs so it's easy to see which one I'm futzing with in less than ample lighting. I know real estate is at a premium on an amp like this, so it may not have been possible to elevate the frequency controls on the faceplate a little so they were easy to see.
The endpoint frequencies are marked on each of the mid-pots, but there's no indication of anything in the middle. It would be good to know whether the frequency pots are logarithmic or linear so those of us with slide rule experience can interpolate the frequencies. That, or a couple intermediate markings would be nice.
Bottom line, I'm glad I made the switch. This one will stick around.