Here are a couple Eublet gems from around 2015 (a search with his name and TH or Tone Hammer will get you all kinds of insightful reading):
Here is another regarding some nuances of playing and using a TH: It's the harmonic content that a clean sound doesn't have. I've learned this many times over in the last few years alone, both live and in the studio. The AGS circuit on the TH cuts the sub lows just a touch...a few dB, and rolls off all that glassy top end. In return, it boost harmonic content when pushed just a bit in the region of the tone that is left intact. I'm not talking about overdrive or grit. I'm talking about what you are saying...an ambience, substance, etc. Don't know what it is. I've found that with the narrower ferquency response, I can scoop mids just a bit to get a great tone which I'd never do on a flat signal through a clean DI like the JDI, and then that brings out warmth in the lows, and some glassy clarity in the highs. The lows aren't mushy, and the highs aren't too zingy/airy/fleeting, etc. Hard to describe in words.
Put it this way, and I've said this a bunch also. Listen to 99% of any recording and the bass tone on those recordings has ZERO of the qualities that most people seem to be going for when describing the tone they like here on TB. The bass is hardly ever pingy and treblly, nor is it boomy and rumbling. It's tight, punchy, present, but yet not sticking out like a sore thumb. The Tone Hammer creates, by default, a very natural and easily recognizable tone for the average non-bass playing listener to enjoy. It just fits in, even with without the AGS. The TH warms up the mids a little, slightly relaxes the zingy top end, and just sounds great. When you engage the AGS, it narrows the frequency response a good bit for a more vintage thing, but the treble and bass controls still work. You can push them and get vintage glass up top that isn't zingy or overly aggressive. It won't take your head off. You can also REALLY push the lows through the AGS without ever worrying about boom or mud.
Narrow the frequency response of the bass, and suddenly you've got room to actually shape the tone more effectively. It might sound counter-intuitive but it's not. All the sudden scooping the mids isn't bad because you're not leaving all that deep low end and shrilly top to stand out. Boost highs b/c it's not going to get razor sharp and slice your head off. Etc, etc.
Tone Hammer. I'm a huge fan obviously.