I bought the preamp a few days ago and I have to say that I'm really impressed.
I was using an Arkham Oracle into a Khan VTDI. I also bought the Walrus Mantle recently and had the Jad Freer CAPO for a few years...and guess what, the Subway is now installed on my board (with the VTDI)!
I have to admit I'm the first surprised that a 200$ preamp works better for me but it's time to make decisions based on my feel and ears...and not just value, hype on talkbass or anything else. Andy (whose work I've always highly appreciated, going back to Genz-Benz and Genzler) has designed one hell of a preamp!
Compared to the Oracle, I feel the Subway is more equal sounding across the fingerboard. It's also way clearer, fast responding and the slaps sounds WAY better. More importantly, I feel I have better control over my sound when changing basses. I play mostly Sadowsky's (J, P, PJ4, PJ5, Modern 4) and Moollon depending on the gig.
The HPF is a total game changer for me and helps the low end cut better in the mix. The
Voicing control is super useful and thanks Andy for the makeup gain design when using the control. That said, I've never used it more than the first half and feel the previous video (The Bass Channel) abused of this feature which gives an impression the preamp is just for modern scooped tone, which it's not if you use the voicing control with taste.
The EQ frequencies center are well chosen and works great. The deep and bright controls add a little too much for my taste but it's nothing a turn of EQ cannot solve. Still, I prefer more subtle boosts like on the Jad Freer Capo where you don't need to touch a second control when you want to use it.
I compared the Subway XLR DI with the Khan (tube) VTDI and while the Subway DI will be fine for most people, I cannot say it will replace my Khan. I'll then use the Subway into the Khan for great versatility from the Subway and get my tube magic from the VTDI. GREAT combo!
I too think the knobs move too easily and took the rubber O ring route. I chose those dimensions and it worked perfectly: 13mm (0.51") (outside) 6.8mm (0.27") (inside) 3.1mm (0.12") thick. $10 for 50 on Amazon. Manufacturer is Patikil (I'm in Canada but it's probably also available in USA). I might go to
PeacePoti knobs for input and master eventually, like I have on some of my other pedals where I don't want (gain) knobs to move during transport.
I run it at 12v as a general precaution because I use active basses but heard no difference compared to 9v. If my power supply was not so easy to switch between 9 and 12v, it would have stayed at 9v.
This preamp is a success and prove that with great design, you can definitely make a product that can compete with the big boutique names at an honest price. Congrats Mesa team on a great product!