Nobody brags about how fast they overshoot a red light—or a marriage proposal.
And yet in audio, we get spec sheets full of shiny numbers like total harmonic distortion, frequency response, or signal-to-noise ratio… but almost never a word about slew rate, overshoot, or transient behavior.
I would love to start a conspiracy theory about this! I mean, it has to be a plot, right? Just like Birds Aren't Real. Tempting.....
Sorry for the deviation...
These are the very specs that tell us whether an amplifier is actually fast enough and controlled enough to reproduce music the way it really happens.
It’s like reviewing a sports car and listing the paint color, fuel economy, and how loud the horn is—while leaving out 0 to 60 time, braking distance, or steering response. Great, it runs. But is it any good?
Slew rate, as we’ve talked about, tells us how quickly an amp can respond to a changing input. Overshoot tells us how well it’s not overdoing it in the process. These directly impact what we hear in transient realism, spatial precision, and timing. They’re not fringe specs. They’re core to musical believability.
But go flip through any glossy magazine review. Chances are you’ll see paragraphs about "smooth treble" and "muscular bass," a few THD figures that sound impressive (but usually mean nothing at normal levels), and absolutely zero mention of time-domain behavior. Rarely square wave response, rise time and never transient intermodulation or ringing.
And that’s the part that sticks in my craw (there's them damned birds again).
It’s not that distortion and noise don't matter—they do. But when you’re evaluating the realism of music reproduction, how quickly and cleanly a circuit responds to change is just as critical. That’s where life happens. That’s where music breathes.
So why don’t more reviewers talk about it? Maybe it’s because these behaviors are harder to explain and measure. Maybe it's because square waves don’t sell as well as buzzwords. Or maybe we've just been trained to care about the wrong things.
Rant over. But next time you see a piece of gear called "fast" or "detailed," ask yourself—fast how? Fast like a race car, or fast like a runaway train?
Of course, there's always the old fallback measuring technique...
Listening.
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