This checker is meant to help you find a good match between your speakers and a Bottlehead amplifier. It’s a guide, not a guarantee.

Speaker manufacturers don’t always measure or report specifications the same way. Sensitivity, impedance, and recommended amplifier power can mean slightly different things depending on who made your speakers. Our calculations use the information you provide and make some reasonable assumptions about listening conditions. Your room, music, and listening habits will all affect the results.

An amplifier rated for more watts than your speaker manufacturer recommends isn’t necessarily a bad match. An amplifier’s power rating describes what it can deliver, not what it’s delivering all the time. At normal listening levels, you may be using only a small fraction of that power. That said, turning things up too far can damage your speakers, whether you’re using a powerful amplifier or pushing a smaller one into distortion.

Tube amplifiers generally produce fewer watts than their solid-state counterparts, but that doesn’t mean they can’t deliver outstanding sound. Wattage has become an unreliable shorthand for amplifier performance, thanks in part to decades of manufacturers advertising inflated power ratings under questionable measurement conditions. At Bottlehead, we take a more conservative approach. We rate our amplifiers based on measured performance at stated distortion levels, not the biggest number we can put on a spec sheet. A few honest watts paired with the right speakers can produce remarkable results. More power has its place, particularly with less efficient speakers or larger listening spaces, but wattage alone tells you very little about how an amplifier will actually sound.

Our recommendations are based on estimated average listening levels, not the loudest peaks in your music. Use the results as a starting point, pay attention to what you’re hearing, and exercise some common sense when turning up the volume.