![]() ![]() This is usually from stereo music signals or the subwoofer (“.1”) channel sound in multi-channel surround sound material such as Dolby Digital or DTS.įor example, you may see terms like “5.1” or “2.1” speaker systems or surround sound audio listed for movies. Unlike older amplifiers, more modern home stereos and especially home theater receivers have a subwoofer output jack (or pair of jacks) dedicated to this bass signal a subwoofer uses to create sound. It also has a built-in low-pass crossover to block higher sound frequencies in order to produce clear and great-sounding bass only.įor non-powered subwoofers the problem comes when you connect one to an amplifier or receiver’s outputs without a crossover – it sounds terrible! Old amplifiers and vintage receivers vs new receivers They’re designed for only low-end bass and not voice or other musical instrument frequencies.Ī powered subwoofer includes an amplifier already inside the subwoofer enclosure. As the cone moves the air inside of a specially designed enclosure (speaker box) deep bass, contained in the musical input signal, is produced. These types are less common.Īn amplifier boosts the low-level input signal in order to drive the subwoofer’s voice coil with sufficient power and move the speaker cone, producing sound.
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