I use the HX One with a passive Fender Jazz bass and I am generally satisfied with it. There are many interesting sounds and some specific to bass (Noble (Regal) Sansamp, Obsidian (Dark Glass), etc.). As many say, it works very well as an all-purpose 'jolly' pedal: personally, I use it as an octaver (Oc-2 simulation is good, EBS less convincing, at least for me), envelope filter (Mutron Up), phaser (Mxr Script Phase), and reverb. Some of the bass sounds didn't convince me (Ampeg Liquifier), but on the other hand some of the fuzz sounds are excellent (Green Russian Big Muff, Swedish Chainsaw). The legacy sounds sometimes seem softer and work better for bass. The various reverbs are very interesting and good for experimenting and with a classic delay, it doesn't take long to get One of these Days... Personally, I use it in my Pedal Board in True Bypass mode, with an Ebs Multicomp always on in front of it. The real disappointment is the tuner, both in DSP and TB mode, which is always quite unaccurate, to the point that I've started using my Korg Pitchblack pedal tuner again. Another pity is that is not too much easy to pass between presets but is perfectly usable if you don't want more than one sound for song. I am considering acquiring an external footswitch. All in all, it's a great purchase, interesting for those who don't want to spend too much on a delay or phaser that they would use very little (my case) and even more so after the price drop.
