I used to own a Power Station 2 a few years ago and back then felt that it was not worth keeping because it wasn't all that helpful with my Bogner Goldfinger 45 Superlead which has an excellent master volume as is and doesn't really benefit from cranking it. But ever since selling it I have regretted it a bit because it was a really good poweramp and I've never gotten a better tone out of my Helix. So as I was casually browsing the used market in my country I came across someone selling the PS100 and decided to bite for a few hundred euros less than new which is fine by me for a product that is a bit hard to get (Thomann says 6-8 weeks...) and very new. They have mode some very useful upgrades to this one. The line out level knob in the back is a very welcome one but the knob is very small so it's a bit hard to tweak (that's what she said!). I wish they had put that control in the front panel too. But the real nice feature is the dual volume/presence/depth controls. These make it so easy to set different levels if you want to get the right volume on an attenuated amp with multiple channels or just want to compare two different settings. Only thing I wish was that they had some sort of dial so it would be easier to set them the same without a decibel meter and that there was an individual low/high range switch for both volumes. Line in mutes the Amp in socket which is a small minus, though I suppose you could use the fx loop return if you want to run a line unit together with your amp into this. Haven't tried the loop. Line out works at the same time as the speaker out. You can also use the line out with the PS100 totally turned off, it still works as a loadbox like that. I used it like that yesterday to do some captures of my Bogner with the Quad Cortex. Soundwise this seems to behave exactly like the 50W 2x6L6 PS-2 despite the PS-100 sporting 2x6550 tubes. That's good news because it's meant to be transparent. And it definitely is. With the loadbox switches dialed in for your amp and volumes matched I can't tell any difference between PS100 on vs bypassed, at least when volume levels are at a comfy 90 dB @ 1m on the amp. Tested this with the Bogner as well as my Vox-flavored Victory VC35 lunchbox. It's also a pretty killer poweramp for modelers. I tried running my Quad Cortex into it via line in and that worked exactly as well as running a real tube amp through the load. While neither of my amps really needs an attenuator, I was planning to use the PS-100 with a modeler as kind of a 3rd rig - the kind that keeps me from buying any more amps! My only real complaint is the built in fan. It's clearly audible even though it gets buried under the sound when playing but it's there no matter what. PS2 had a similar issue but I can't remember if it was bothersome or not. I'm not in a hurry to crack this open but I might swap the fan for a Noctua at some point to try to make it more quiet. It's not the lightest unit to carry around but otherwise I can heartily recommend this if you have a bunch of amps that you'd like to run any way you please.