Sound wise, there's a lot to discuss. The Mobius is a lot more featured than a Lunar offers in terms of selectable modes. One of the attractions that the Mobius offers is a User Interface that is intuitive and easy to navigate on the fly. Probably more so than most larger digital panels. It's got that big mode dial that is very easy to operate. I can call up a patch using my Boss ES-5 and then spin the dial to any one of it's nearby modulation settings / patches. This is fast and easy to use, but can be a bit irritating if the specific chorus I'm looking for is patch #2 and I've jumped in at #47. With 12 clicks on the dial...that's a lot of tuning. Of those 12 modulation options, I found some were more useful to me than others. I like the d-bucket and Multi Chorus options. Both are nice and clear chorus sounds. However, the tone control is useless on bass and the mix is a parallel blend and not so useful on bass. If I loose some low end and dial in the mix, It waters down some of the chorus effect too. I've often felt that a variable LP filter on the clean side would fatten up the loss of low end that chorus effects often cause. But that's not on offer on the Mobius. Enter the Lunar with it's Low retain control....guys are SA...this needs to be assignable to one of the unit's 4 device knobs. No bassist needs the Mix control on the Gemini.
I found two Chorus sounds that I liked from the cloud patches: "Wet 80's CE-5 for Bass" and "Dual Chorus". I haven't yet found a Corona multi (TCe) patch yet...so I might need to make one myself. Patch 1 & 2 sorted.
Next on the Mobius dial is the Flanger setting, that I hardly used. In all my Boss ES-5 patches...I have only 1 with a flanger. The mobius offers a lot of different flanger settings. To be honest...I found one that I like and then looked for something similar on the Lunar. One slot 3 loaded on the 6 patches list...tick.
The Rotary on the Mobius is amazing. It's easy to use and by hitting the tempo button it can flip between 2 speed settings. It's one of the best rotary sims I've used, the Lunar has two Resonator effect types, they don't thrill me as much as the Mobius offerings. I found a cloud patch "lesliemr" and once I dialled in the control a bit more...I've got it to a place where I like it. It's not quite as good and the Mobius if I'm honest...but it's close enough and I can assign the speed knob to an external midi expression pedal...nice. However...there are better sounding rotary options on my nearby H9.
Next up is the Vibe, on the mobius it's a funky and strange effect...covered completely by the Lunar's Vibe Effect type. I think the Lunar's offering is more versatile and has a greater speed range and adjustable LFO shape. I loaded "Chop Tremolo" into slot 4 and I like it a lot. I didn't expect it to cover this much ground and makes a good vibe and Trem option.
The Phaser option on the Mobius was good, but the Lunar's options are simply fantastic. It has a clarity and movement that the Mobius can only dream of. Surprisingly I loaded 2 of these, the Stock "Classic" and "Multi" went into patch 5 & 6. So that's my Lunar loaded. I can only add more patches from the scenes on my Neuro hub.
The other Mobius settings: The Filter. It's good, but I never used it as a filter. For me, this function is covered by either my H9, my C4 or my new EQ2 (once I get my head around that feature, and the volume swell option). The Pattern Trem is a nice feature, but u have similar options on my H9's, The Vintage Trem is fantastic, but I'm finding similar options on the Vibe Effects Type on the Lunar and again similar options on the H9's. The Swell never worked reliably for me, I prefer to swell with an expression pedal. The Formant is replicable on the Lunar, just not something I'd use. I had one patch using the Quadrature and to be honest...I don't miss it much. The Destroyer setting is more useful for a guitarist...and I have similar on the H9 or I could EQ2 it better...although I doubt that I'd bother.
So is the Lunar a replacement for a Mobius? Yes and no. If you like all the other weird and wonderful features of the Mobius then you will find the Lunar lacking in certain areas or patches in a direct feature comparison. If you are looking for a dedicated modulation pedal that stays in the niche (where the Mobius creeps out of into other areas) then yes it's more than capable.
The Lunar gains with it's small foot print, Low retain option and flexible 4 band EQ. It has a HPF that's a sweet addition. I was surprised at how useful the one knob tremolo is on the Lunar. It easily matches the flexibility of the Vintage Trem on the Mobius and then exceeds it with the Vibe Effect Type.
I think the Resonator options aren't quite as good as the Mobius. However, they are still very good and more than usable. I have since found that there's a Rotary patch on my H9 that is better than both of them. I should have gone looking earlier.
Sonically, I suggest that the Lunar is slightly better on bass than the Mobius. The Phaser is simply better. But I've not yet found any Chorus pedal (and I've tried a few) on bass that really knocks it out of the park for me. I'm often left with a sense of "mehh". That's not directed at the Lunar or Mobius specifically, I think that these class of effects operate best with frequencies that the bass doesn't produce much of. I think the Lunar's Chorus options are slightly less "mehh" for me. I've found a pair of Chorus sounds on my H9 that are stronger than both the Lunar and Mobius. "Classic Chorus" on the Vintage Delay Algorithm and "Boss CE-2" in the Chorus Algorithm. The "Tumbleweed" setting on the "Tremolopan" Algorithm is fantastic too.
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For me, adding the EQ2 was a necessity and was the main reason for pushing the Mobius off my board. It was a land grab and I needed the space. I was happy with the Mobius' sounds and functions, but now that I've integrated the lunar and EQ2 in to my board and patches...and I've worked around some of the holes left by the Mobius...I'm not actually sure I'll ever miss it.
No liquids on the electronics.