AV Receiver Tech

Bass: It is undoubtedly the most misunderstood aspect of a home theater system's performance and, in some ways, the least appreciated—especially among the higher-end ranks. Bass' bad rap (no pun intended) derives from a number of sources, but its fundamental undoing is its poor implementation in the vast majority of audio systems—from the genius who cruises around with 10 $50 monotone subwoofers in the trunk of his car to the home theater owner who hasn't put forth the considerable time and effort it takes to properly calibrate low-frequency output. Poor-quality subs, of which there is no shortage, are as much to blame in this situation as user error. The bottom line is that quality bass performance is critical to any audio, music, or home theater system, and its journey begins long before the signals ever reach our speakers.

A/V What?
An A/V receiver combines three audio components in one box. Primarily, it performs the traditional roles of a preamplifier and power amplifier. The sound for any home theater begins as a relatively low-level audio signal coming off a source component such as a cable box or disc player. These days, it’s more likely to be a digital audio signal than an analog signal. That signal gets converted between digital and analog as needed, manipulated to affect your volume adjustment, and might perhaps have some bass and treble contouring (or more sophisticated equalization) applied before it’s sent to the power amplifier, whose only job is to pump it up to the power level necessary to drive your speakers to sufficient volume.