By Wilde Becker. Speaker Stands. At Tuesday, July 30th 2019, 19:03:40 PM.
If you already have a speaker stand with spikes and your floor is made of wood, then you should consider putting some form of isolation platform between the speaker and the stand, to prevent the cabinet vibrations reaching the stand and, through it, the floor. Avoid flimsy stands that move or rock when you touch them. If the final assembly doesn’t feel completely solid, avoid it.
The theory is that the mass and spring characteristics are chosen so that the resonant frequency of the combination is well below that of any frequency they’re likely to be asked to isolate. For example, if the lowest note a speaker can reproduce is 30Hz, then the resonant frequency of the supporting platform needs to be well below that — perhaps just a few Hertz or less.
An isolation platform works in a similar way to a car’s suspension, and comprises three mechanical components: a spring, a mass supported by the spring, and some form of damping to prevent the sprung mass from continuing to bounce around. In a car you have the springs between the axles and the car body: the car body provides the mass and the shock absorbers provide the damping, to stop you having a bouncy ride.
Their smaller stands are made from a type of plastic and their larger ones from cast metal. All are perfectly valid approaches. Note that some speakers, such as certain Genelec models and Event’s Opals, already come with resilient isolating platforms or feet and so may not need additional treatment.
That’s where you need to put the sub. If your sub has a phase adjustment knob, or a polarity–invert switch, adjust this until you hear the loudest result from frequencies around the crossover point, typically 80 to 120 Hz.
And according to Otto Jørgensen, this is where you have the most to gain from acquiring a pair of speaker stands: “The most impactful benefit of getting stands is added distance between your speakers and surfaces. It keeps early reflections to a minimum. And that’s especially important for the speakers’ low-end performance.”