For a while now I've been recording how different amplifiers sound.
Lately I find the thinking behind the sound just as interesting as the sound itself. This isn't a piece with a tidy conclusion — just a bit of that curiosity, written down. Read it with your shoulders relaxed.
An amplifier is a pile of someone's decisions
Open up a single amp and you find countless choices.
Where to build the gain. Which frequencies to cut, and where. How much negative feedback to apply. What to control, and what to deliberately leave alone. Behind the sound you take for granted, the person who built it made decision after decision — and most of those decisions never appear on a spec sheet. The catalog says "two gain stages, 2× EL34," but not why that layout, or what sound they were reaching for when they landed on those values. Yet it's exactly that stack of unwritten decisions that is the amp's character.
Touch an amp with that in mind and you start to see past "good tone / bad tone." This harshness might not be a flaw — it might have been left in on purpose. This thin clean channel might be what got sacrificed to prioritize a deep, saturated lead. This unwieldy low end might be a weapon in the right genre. Once you start imagining why it is the way it is, before judging it, a single amp suddenly becomes something to read. When CSL calls what it does "recording" rather than "reviewing," this is what it means: reading the decisions.
An amp is decided by feel in time, not by numbers
The other thing I keep coming back to: an amp's quality can't be explained by its frequency response alone.
Two amps that measure with nearly the same tonal balance can feel like completely different instruments to play. Where's the difference? Time. How the amp bites into your picking, how it lags, how it breaks up. The instant between the attack landing and the distortion arriving; the way compression grips as a note decays; the sag you feel flexing when you dig in. Grain, compression, playing feel — none of these are about frequency. They're about a response that unfolds in time. It doesn't show up on a graph, but it reaches your hands.
So rather than staring at a spec sheet, putting the timing of playing into words gets me closer to what an amp really is. And this connects to why CSL insists on recording "the state as it actually sounded." Feel in time can't be transcribed as numeric parameters. You can note the gain and EQ settings and still not reproduce that bite. The only option is to keep the sound itself, together with its conditions. If numbers were enough, there'd be no need to record anything at all.
What's interesting is the buried one, not the classic
And one more thing. What draws me in is usually the forgotten amp, not the famous classic.
The market simplifies brand stories. "Marshall means the JCM800, Fender means the Twin, Mesa means the Rectifier." Once that script sets, the ambitious designs around it — the experimental hybrids the same makers built, the short-lived transitional models pointing a different way — quietly fall out of the story. It didn't sell; it was too early; the marketing was weak. The reasons vary, but "it vanished because it sounded bad" is surprisingly rare. Mostly there just wasn't a chair for it in the story. That's why the transitional experiments, and the odd one-off layouts only a single company tried, are so often the interesting ones.
In an amp like that, the maker's decisions survive raw and unadorned. Precisely because no one props it up as a classic, it isn't buried under after-the-fact myth, and you can read the design philosophy as it is. The one that sold has been talked to death; the buried one, no one has read yet. That CSL keeps chasing minor amps and transitional gear is probably because that's where the interest is. And left alone, those amps really do disappear. So I want to record them while they're still making sound.
I'll keep mixing in stories like this
Of course I'll keep recording sound, introducing gear, talking about profiles.
But I want to fold in these "how it was designed" pieces from time to time. Read one amp as a pile of decisions, hear it as a feel in time, pick it up as an interest that fell out of the story. These three viewpoints will probably run underneath much of what I write from here. I don't intend to force a grand conclusion each time. One amp at a time, I'll just write down the decisions I found interesting. If, read back later, the scattered pieces turn out to form a loose map — a map of how people have implemented their ideas about music into an industrial product called the guitar amp — that's enough. For today, think of this as the entrance.
In short
An amp is a pile of someone's decisions. Its quality shows up in feel-in-time more than in numbers. And what's interesting is often the forgotten one, not the classic.
I'll keep recording and reviewing — and now and then, I'll write about the thinking behind it too. For today, just the entrance.