2.2
WHAT THE SDEC DOES
15
Channel to Channel Distance Correction (Auto-Time Correction):
The listener’s preferred listening location doesn’t always coincide with the “acoustically best” position; furniture place-
ment, screen location, traffic patterns and other factors can keep us from sitting where “sound sounds best”, typically
determined by speaker placement geometry. The SDEC can compensate for unequal distances to loudspeakers and move
the “sweet spot” to the listener. This feature is called “Auto-time arrival correction” in the Synthesis system.
Figure 3:
Effect of Auto-Time Correction
Crossovers:
The SDEC-1000 (used in bi-amplified Synthesis I systems) performs the function of electronic crossover in addition to its
other tasks. This allows for more precise transducer correction and all other attendant advantages of bi-amplification. The
crossovers are 24dB per octave (4th order) Linkwitz-Riley type. This high-performance class of filter is rarely attempted in
passive crossover designs due to its inherent complexity.
