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Subwoofers: When I was first getting interested in all things audio, home subwoofers were rather specialist devices that were only of interest to two groups of hi-fi enthusiasts: those who listened to large pipe organ recitals and those who enjoyed reggae! Things have moved on a great deal since those distant days, and today subwoofers are now considered — more for the ‘domestic acceptance’ factor than any potential sonic benefits — to be an almost standard part of modern hi-fi and studio monitoring systems It is therefore becoming increasingly common to have smaller ‘satellite’ left and right speakers, plus one or more subwoofers — a format often referred to as 2.1. The two refers to the main pair of stereo (left and right) speakers, while the ‘.1′ refers to the limited-bandwidth subwoofer. In the same way, a surround sound system is often denoted as 5.1, meaning five main channels plus a subwoofer to handle the low frequency effects channel (LFE). However, in the case of 5.1 home theatre and surround sound systems, a dedicated subwoofer is required specifically to handle the low frequency effects (LFE) channel. The fact that this sub usually also doubles up, through the use of bass management (explained later), to handle the bass content of all five main channels as well, is just a convenience that allows the use of smaller satellite speakers. Again, I’ll come back to this topic later, but I first want to consider 2.1 stereo monitoring arrangements.
