What does sensitivity mean?
Speaker sensitivity tells you how efficiently a speaker converts power into volume. It’s measured in decibels (dB) - specifically, how loud the speaker will play when fed 1 watt of power at a distance of 1 meter.
In plain terms, sensitivity answers the question: “How loud will this speaker get with a given amount of power?”
1. Understanding the Numbers
Most hi-fi speakers fall between 84 dB and 90 dB sensitivity:
- High-sensitivity speakers (90 dB or higher): Play louder with less power. A modest 30-watt amp can make them sing.
- Low-sensitivity speakers (below 86 dB): Require more power to achieve the same volume - they’ll benefit from a beefier amplifier.
Each increase of 3 dB in sensitivity means the speaker will play just as loud with half the power. For example:
- An 87 dB speaker with 50 watts ≈ as loud as a 90 dB speaker with 25 watts.
2. Why It Matters
Sensitivity helps you match your speakers to your amplifier.
- If you have a low-power amp (like a Rega io at 30 W per channel), choose efficient speakers (around 88–90 dB or higher).
- If you’re running high-powered amplification, you can use speakers with lower sensitivity without issue.
Get this balance wrong, and you’ll either push your amp too hard or leave speaker performance untapped.
3. How It Affects Listening
High-sensitivity speakers tend to feel more immediate and dynamic, often delivering punch and scale even at lower volumes.
Low-sensitivity designs can still sound fantastic - many high-end speakers trade efficiency for deeper bass extension or precision - but they’ll need serious amplification to open up fully.
Our Take
Think of sensitivity as the speaker’s personality: how easily it comes alive when you feed it power. It doesn’t determine sound quality by itself, but it shapes how your system behaves together.
Pair an efficient speaker with a modest amp, and you’ll get lively, musical sound. Pair a low-sensitivity speaker with a strong, stable amp, and you’ll unlock refinement and control.