Continuous technological evolution is the inevitable consequence of vendors' desires to sustain revenue and profit at healthy levels. When that product progression results in regressive experiences for end users, however, its sustainability is uncertain. Peer at the back of a modern home-theater receiver, and you'll note a preponderance of analog-signal-carrying connectors amid the plethora of plugs (Figure 1). RCA jacks route low-level analog-audio signals, and banana plugs and binding posts handle post-amplification connections to speakers.
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