Music is analogue at the source — a guitar string, a voice, a piano hammer hitting a string — so it’s tempting to assume analogue amplification should be the natural way to reproduce it. Roland Hoffmann, Director of Product Marketing at Steinway Lyngdorf, explains why that instinct misses what actually happens between the recording studio and your speakers, and why understanding analogue versus digital amplification starts with what happens to music long before it reaches an amplifier at all.
Why analogue versus digital amplification is really about storage first
Almost every studio, whether recording music or film, works entirely in the digital domain today — the instant a voice or instrument is captured, it becomes digital data. That means the “keep it analogue” instinct only really applies to the brief moment before a microphone, since everything after that is stored, copied and transmitted digitally simply because less can go wrong to the signal that way. Analogue storage and transmission are vulnerable to hiss, crosstalk, leakage, noise and gradual degradation over time in ways digital data simply isn’t, which is exactly why digital became the standard for preserving and distributing recorded sound in the first place.
The idea behind Peter Lyngdorf’s digital amplifiers
If digital is the better way to preserve music as data, the logical next question is why convert it to analogue any earlier than necessary. That’s the reasoning Peter Lyngdorf and his team followed in the late 1990s, well before most music was even digital: keep the signal in the digital domain for as long as possible, and only convert it to analogue at the very last stage, where the amplifier drives the speaker. Somewhat surprisingly, most amplifiers marketed as digital — Class A, AB, G, H and even D switching designs — actually convert the signal to analogue first and amplify it there, picking up every analogue side effect along the way. Some of the least refined designs go a step further and squeeze the signal through an old-fashioned analogue volume pot before it’s even amplified — a solution Hoffmann is happy to point out belongs in the 1950s, not on a calendar reading 2024.
Why analogue amplifiers still hold their place
None of this makes analogue amplification bad — well-executed analogue designs are mature, refined and can sound excellent, and not every digital component on the market is automatically well engineered either. Good sound in either domain comes down to component quality, circuit design and budget, not simply which domain the signal happens to live in. Hoffmann is also candid that some analogue side effects — mild overtones, a touch of distortion — genuinely sound pleasant to many listeners. The trade-off is that this pleasant effect is a form of coloration: the same coloration gets applied to every voice and every instrument alike, whether or not it belongs there, which is why staying in the digital domain as long as possible remains the more faithful approach to reproducing a specific recording as it was captured.
Why more amplifier power and headroom matter
Digital and Class D amplification were originally developed for energy efficiency, not sound quality — Class A and AB designs simply generate too much heat to fit into portable devices, computers or multi-channel AV receivers. That efficiency also happens to deliver more usable power from the same power supply, which matters for a different reason than raw loudness: headroom. An amplifier rated at 400 watts per channel rarely needs anywhere near that in continuous use, but that reserve capacity means a sudden musical transient or dynamic peak is handled without strain, the same way a larger car engine makes normal driving feel more effortless even though its extra power is only used in brief moments. That effortlessness, more than outright loudness, is what more amplifier power is actually good for. Hoffmann covers two related building blocks of a system that sounds effortless in other Tech Talks: speaker placement and harmonic frequencies.
Frequently asked questions
What’s the real difference in analogue versus digital amplification?
The bigger difference happens before amplification: virtually all music is recorded, stored and transmitted digitally today because digital data resists degradation, noise and crosstalk far better than analogue signal paths. A digital amplifier keeps the signal digital for as long as possible before converting it at the very last stage.
Why did Peter Lyngdorf design amplifiers to stay digital as long as possible?
Because converting music to analogue early exposes it to side effects like noise, hiss and coloration for the entire signal path. Keeping the signal digital until the final conversion at the speaker output minimises how much of the chain can degrade the sound.
Are most “digital” amplifiers actually digital all the way through?
No. Most amplifier types, including many marketed around digital or Class D technology, convert the signal to analogue early and amplify it there, picking up the same analogue-domain side effects a conventional amplifier would.
Is analogue amplification bad for sound quality?
Not at all — well-designed analogue amplifiers can sound excellent. The issue is that any pleasant coloration from analogue components gets applied uniformly to every instrument and voice, regardless of whether that coloration belongs in the original recording.
Why does more amplifier power matter if I rarely play music loudly?
Extra power provides headroom for sudden musical transients and dynamic peaks, which need a short burst of power far above the average listening level. That reserve, not everyday loudness, is what makes an amplifier sound effortless.
