(SECTION FIVE: Evolution 505 Operation continued)
Using the Filter Button or Key (17)
Four filters make subtle changes to the high frequencies at ultrasonic levels, alter- ing the sonic presentation from your loudspeakers. Once a filter setting has been selected, it is held in memory even if the Evolution 505 is turned off and then returned to operational status.
Filter 1, 2, 3, and 4 are available in any SACD format. Only Filters 1 and 2 are available in the conventional CD format. All filters have a different output gain, higher bandwidth, and a more gradual rolloff in the SACD format, compared to Filter 1 and 2 in the CD format.
Filter 1 and 2 are designed to eliminate aliasing artifacts that are the result of the D/A
Conventional Compact Disc Format Filters
Filter 1 operates flat from 20 Hz to 20 kHz, with a very steep
Filter 2 operates up to 20 kHz
SACD Format Filters
Filter 1 in the SACD format, has the same relative output gain as Filter 1 and 2 in the CD format, and it has the highest bandwidth of the four SACD filters. Filters 2, 3 and 4 in the SACD format, operate at reduced bandwidth with steeper slope fil- tering and different output gain.
Filter 1 operates up to 180 kHz (highest bandwidth) and has the slowest
Filter 2 operates up to 75 kHz and has the steepest
Filter 3 operates up to 80 kHz and has the 2nd steepest
Filter 4 operates up to 90 kHz and has the 3rd steepest