Sampling frequency is at least twice the frequency of the signal, and 2. A long time ago, it was proven that all the information in a signal, audio or otherwise, is retained under the following conditions: 1. What's the thinking behind that?Īnalog-Direct mode can always be used, although misunderstanding of how PCM works persists 20+ years after it began in the audio world, with the same old mention of ideas started by people who took some graphics of sine waves turning into stair steps from textbooks but missed the words they came with and the graphics that followed. I'm not comfortable with my continuous, pristine analog signals being sliced up and turned into digital so they can be processed by the DSP, but this is what your surround preamps do. As well, a "bass spaciousness" effect can be dialled in with the phase control if it's available on one of the subs (which is what happens when two widely spaced microphones pick up a low frequency source - same long wavelength, different phase between the two). Inside a room, running them in mono instead is beneficial because they can be moved to wherever they create the least amount of resonance individually, and as a combination, make each other's response peaks and valleys less severe. large pipe organ using widely spaced microphones) and unless the subs are located outdoors and away from the ground, they can't reproduce it anyway. Few recordings contain real stereo bass info, (e.g. This is not recommended because a stereo subwoofer configuration has little value.
No, although the same job can be done by disabling the sub channel in the setup menu, then hooking up the subs through their own crossovers to the front left and front right channels. Does this mean that it uses this much electricity all the time? This is the very idea behind bass management and powered subwoofers in home theater systems.) The specs say that the amp uses x number of watts. The speakers must have separate inputs for this - be sure to remove the jumpers from the speaker inputs first or amp will become instant toast! If one amp starts running out of power, usually the one driving the woofer, then the other side remains clean instead of becoming part of the problem, a double-win. (What's biamping? It's using one amp channel for the speaker's mid-high frequency drivers, and another for the low-frequency drivers. Using the passive crossover in the speaker is indeed the correct way to biamp. Different sound doesn't mean better sound. Tearing out the speaker's own finely-tuned crossover to replace it with an active crossover with generic controls almost guarantees that, just for starters, frequency response will be altered. It is responsible for correcting frequency response aberrations of the individual drivers, maintaining phase coherence between drivers, optimizing off-axis response, balancing levels between drivers, setting up impedance, at times improving woofer performance by rolling off not just the top, but also frequencies that are too low and cause it to misbehave, and other things that vary according to model.
The carefully custom-designed crossover in a high performance home audio speaker does a lot more. While active crossovers do have their place in PA systems, it should be noted that equalizers are also a part of it.Ī generic active crossover on its own merely divides the audio band into smaller ones. No meaningful amount of current, no wasted power.Īccording a recurring audio-myth, only an active crossover should be used for biamping, in order to split the band before the power amp instead of inside the speaker, thereby reducing the amount of work each amp channel has to do. Higher impedance means less current draw. With the jumpers removed on a biampable speaker, the impedance of each section is not the usual 4 or 8 ohms, but several hundred if not more at the frequencies that the amp is "not supposed to be amplifying".
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