I am a finger-style player and go for a full warm sound. I have been in a Motown dance band these last 10 years among other projects and go for a vintage, full sound that cuts through and can be heard as well as felt. I also play Classic Rock and Grunge/Alternative and like a little dirt in there too. I love my Walkabout but there have been times when I wished I could push it a little more and have the headroom without it compressing so much. I was looking for a more powerful alternative. What follows is only my opinion and I offer it because I was asked to. I have the greatest respect for what Mesa is doing related to the bass amplification world and I am a long time fan, having owned in the past a 400+, a Titan and a D-800+. I still own and enjoy my Walkabout scout and D-180. I hope what I say does not sound like I am bashing the amp, it is only my opinion. There have been many in-depth reviews of this amp in this forum and this is not to be confused with them. These are only my thoughts.
I found the WD800 to be very articulate, but lacking in any character or signature sound. That is what I meant by saying it was transparent earlier, to some that is a good thing, but to me it sounded too plain. To my ears it is very "clean", not adding much other than amplification and tone adjustments. Once again, some may be looking for that. I did not touch the Para mids at all and limited my twiddling to the HPF, bass, mid, treble and damping controls, along with the gain and master. You know how some Mesa amps can be very throaty? Not this one. I could get the D800+ to bite in the upper mids and sound pleasing in that sense, but the WD was a more controlled tone, even when boosting the mids I did not get a sound I liked although there is a lot of variation to the range. I could not get the Mesa "throaty" sound that I was looking for.
Cranking the input with my passive P bass did not give me the pleasing tube breakup I was expecting, although with a higher output bass YMMV. Seldom do hybrid amps excel at this and I think some of the amps that emulate it, such as the D800+ actually sound better in this respect. If you like the low end the WD has no limitations there and will not disappoint. It will go as low as you like and it is a fast amp. Lots of power. With the HPF I found I was able to tame it but I could see it becoming and issue for some if they do not harness it in. Big Bottom! I found the top end to be lacking in adjustment and kind of understated and not much going on there. I am not a very articulate reviewer, as far as others and do not have the experience and credentials as many past reviewers of this amp so I will just say that there was a lot of boom but not a lot of sizzle. Is it a good amp? Absolutely, it is all the Mesa quality we have come to expect and is an incredible testament to their engineering skills and production. It is just not calling to me.
I am of the mind that I'll set an amp flat and then see how I like it. Call it the voice of the amp. If I have to do a lot of tweaking to get my sound I usually move on. I am aware that is the reason all the knobs are there and some enjoy taking full advantage of them. I did try different settings, such as the HPF is and the damping knob. Yes they both are very effective and useful and can help in a lot of situations. My opinion is this is a very clean amp without being brittle.
In the end it came down to as I said before, the amp was not a Hell Yeah! to me. Especially at $1K, I realized I did not need an amp that did not excite me.