Post by bluemeanies on Aug 19, 2016 8:41:50 GMT -5
What makes speakers sing...here is an article that may help you decide which speaker and brand to choose from on your next investment.
That's part of the reason I am posting this article. Speakers should be looked as more than something that radiates music thru voice coils and speaker cones.
It's might be the most important part of your 2channel system.
Every amazing loudspeaker traces its routes back to its tweeter. Tweeters reproduce the higher frequencies, typically from 1 kHz through 20 kHz. They come in every shape, size and technology: domes, ribbons, folded, horns, planars, electrostats, even massless devices like the “blue flame” Ionovac or Hill Pasmatronics.
What most have in common is their need to be limited in what they try and reproduce. High frequencies.
The tweeter frequency dividing network, called a crossover, can range from the simple to the complex. Generally, they are simple.
Many tweeter crossovers, from the uber-expensive four-figure beasts to the $100 a pair variety, rely on a single element to restrict what they play.
A capacitor.
relcap_pcu
Capacitors are simple devices. They consist of layers of conductive material sandwiched between insulating materials. They work somewhat the opposite of the coil we discussed yesterday.
A coil passes DC (battery voltage) and low frequencies without restriction. A capacitor passes no DC, and signal begins to flow only as the frequency rises.
So the most common tweeter crossover circuit is a single quality capacitor inserted between the power amplifier and the tweeter. The point at which music starts to play depends on the tweeter and the size of the capacitor. The bigger the cap, the lower the frequency that passes.
And here’s an area where quality matters. Cheap speakers use cheap capacitors. Expensive speakers use expensive caps if they are to sound good.
