Check out this video of bass virtuoso Tony Grey recording Then and Now using a pair of KEF M500 headphones. We're pretty stoked because you can't record music with the clarity, soul and precision of a piece like Then and Now using monitoring headphones that can't keep up.
This is the thing with loudspeakers: Impedance is not a set value as it tends to change with frequency. In order to truly know the impedance of a speaker, you need a graph of the impedance at every single frequency in the speaker’s operating range. Not likely.
Here’s the way we spec the impedance of our R900:
Impedance: Nominal = 8 Ohm (minimum = 3.7 Ohm)
In a casual conversation we'd say the R900 is an 8 Ohm speaker. This means the rated nominal impedance takes into account the impedance of the speaker (voice coil) itself and the components in the crossover. Or, 8 Ohms is the nominal amount of impedance the speaker presents to the amplifier, and 3.7 Ohms is the minimum impedance seen over the operating frequency range.
You may have heard that you need two subwoofers to get the most out of your home theater system. You probably passed that bit of advice off as the ploy of an overzealous salesperson attempting to make you part with even more money as you build your dream audio/home theater system. However, there's some serious science behind the claim: Adding a second subwoofer might just solve the most maddening problem faced by home theater owners: uneven and spotty bass response.
The mastering engineer is a specialist with finely tuned ears who can hear things most of us mere audio-mortals can’t. But without the work of the mastering engineer, things like volume and equalization wouldn’t be consistent, and problems with the final mix and production would greatly diminish the listening experience for all of us.
On May 23rd I had the pleasure, as part of KEF’s partnership with professionals in the audio production field, to listen to a pair of LS50’s in a mastering studio in New York City run by a multi-Grammy® Award winning mastering engineer. We’ll talk more about him and his studio another time, but I was too blown away by how the LS50’s held their own yesterday to wait!