Why do people want to cardioid loudspeakers?
A cardioid is able to enhance certain sounds but also able to reduce unwanted noise. Annoying reflections of the room can be cancelled out so the listener is able to hear more of the recording. Factually a sound as true to original signal as possible.
What is a cardioid waveform?
Soundwaves travel in a spherical pattern away from its source until they meet a surface or an opposing force. A so called positive wave can be cancelled out by a negative wave. This way, it’s possible to entirely cancel the sound generated by a speaker with another one. By cleverly using this phenomenon and using a time offset, it is possible to ‘aim’ the sound in a certain direction, more to the front, less to the back. This results in a cardioid or heart shape.
Why now? Why did it take so long for this technology to appear?
For decennia audio technicians have been trying to get the perfect sound from speakers, the first cardioid speaker appeared in the fifties. But these speakers couldn’t benefit from the technology we have now, they relied heavily on the acoustics of the case itself and the analogue amplifier (this doesn’t make them any less impressive).
How does the 8c use this technology?
The 8c uses the best of two worlds. By combining the acoustics of the case with the latest technology, the 8c is able to create the optimal flat frequency response. The integrated digital signal processor (DSP) acts as an exchange filter and allocates the mids, highs and lows to the driver, tweeter and subwoofer. This all happens digitally and is therefore more easily adjustable and more accurate than the analogue equivalent. In addition, it is possible to create filters that were previously impossible. By using two subwoofers, the 8c is able to get this effect in a small package. In addition, this effect makes the 8c suitable to be placed relatively close to a wall. The 8c essentially takes the limitations of the room out of the equation.