Speakers

Speakers are the component where the differences are largest, the measurements are least complete, and the marketing is least useful. They are also where your money makes the most audible difference — which is an awkward combination, and the reason this hub is organised around the two numbers that are actually published.

Sensitivity: the number that decides your amplifier

Sensitivity tells you how loud a speaker plays for a given input. The ELAC Debut 2.0 B6.2 publishes 87 dB at 2.83 V/1 m; the Klipsch R-51M publishes 93 dB. Six decibels looks modest and is not — every 3 dB is a doubling of amplifier power, so 6 dB is a factor of four.

But that comparison hides a trap, and almost nobody explains it. Those figures are quoted at 2.83 volts, not at 1 watt, and those are the same thing only into 8 ohms. The ELAC is a 6-ohm speaker, so 2.83 V delivers 1.33 W — meaning its 87 dB figure is worth about 85.8 dB at a true 1 watt. The real gap to the Klipsch is 7.2 dB, which is 5.2× the power rather than 4×.

Correct for that before you compare anything. Our matching guide does the conversion and then computes how loud each pairing actually plays at your listening distance. It takes two minutes and it is the whole decision.

Impedance: the number most makers will not print

Sensitivity says nothing about the current an amplifier must supply. That is impedance — and specifically minimum impedance, the dip where an amplifier actually struggles.

Q Acoustics publishes it: the 3020i is nominally 6 ohms with a 4-ohm minimum, plus a recommended amplifier range of 25–75 W. KEF publishes 3.7 ohms minimum for the Q350. Nobody else we cover publishes a minimum impedance at all.ELAC, Klipsch and Polk all decline. Klipsch describes its speakers as “8 ohms compatible”, which is a marketing phrase rather than a measurement. Polk publishes no nominal impedance whatsoever, only “compatible with 4- and 8-ohm outputs”.

And here is the gap that ought to bother people more than it does: a speaker may publish a 4-ohm dip while the obvious amplifier for it — Yamaha’s A-S501 — publishes no continuous 4-ohm rating at all. Nobody is lying. You simply cannot complete the calculation, and anyone who tells you the pairing is fine is filling in that blank themselves.

Powered or passive

Passive speakers need an amplifier. Every component is separately upgradable, and sensitivity and impedance matter because you are choosing the amplifier yourself.

Powered speakers have the amplifier inside. Fewer boxes, lower total price, and the amplifier is fixed forever — when you outgrow the speakers you replace it too, whether it deserved it or not. Sensitivity and impedance are not published for powered speakers and that is correct: the matching was done at the factory, so the numbers have no buyer-facing meaning.

One caution there: Edifier publishes an “input sensitivity” in millivolts. That is a line-level input spec and has nothing to do with loudspeaker sensitivity in dB. They share a word and nothing else.

If a turntable is your source, the powered route has one genuinely compelling option — the Kanto YU6 has a phono stage built in, so it collapses amp, phono stage and speakers into one purchase. That comparison is here.

What the brackets buy

Under $300 gets you a genuinely good small pair — the ELAC B6.2 lives here, and it reaches 44 Hz, which is remarkable at the price. $300 to $500 buys cabinet quality and better documentation: the Q Acoustics 3020i’s inert cabinet is its whole design argument, and it is the one thing you cannot retrofit. Above $500buys extension and drivers — the KEF Q350’s coaxial Uni-Q is a real engineering difference rather than a finish upgrade.

What we would skip

Buying on frequency response numbers without tolerances. ELAC publishes “44 to 35,000 Hz” with no ±dB figure at all, which means the endpoints could be anywhere. Klipsch publishes 62 Hz–21 kHz ±3 dB, and Q Acoustics 64 Hz–30 kHz +3/−6 dB. Those are specifications; a bare range is not.

We would also skip confusing power handling with recommended power. ELAC’s “120 W maximum power input” and Klipsch’s “85 W continuous/340 W peak” tell you what will damage the speaker, not what will drive it well. A speaker rated to handle 120 W does not need a 120 W amplifier.

Finally: every specification below links to the manufacturer document we read it from, and we have not heard any of these speakers. You will find no sentence about how they sound anywhere on this hub, because we have not earned one.