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7 Filters
The SA-7S1 is equipped with the “PEC 777f2” filter, developed with an improved algorithm from the digital filter for CD playback
“PEC777f” (Phase Error Compensation 777 filter) that uses Marantz original DSP.
When playing a super audio CD, the D/A converter internal filter is used.
The filter has 3 types of built-in characteristics for both Audio CDs and Super Audio CDs, and the characteristics for each are shown
in the table below. Change these settings according to your own personal preference.
7 Filter operations
The filter settings can be made while the track is stopped. The filters shown in the table below are available for providing distinctive
filtering according to the operation and Audio CD or Super Audio CD.
Each time the
FILTER
button is pressed, the filter types cycle from FIL1 → FIL2 → FIL3 → FIL1.
The filter setting has a memory retention function so that the setting remains stored and unchanged even when the disc is changed
or the power is turned off.
Filter Selection Table
This is a direct mode that does not perform any
filtering on the DSD data. The original source data
is reproduced without any alteration.
This filter dampens the section of DSD data that
exceeds 100kHz. Also, operations within DAC are
made asymmetrical, priority is given to DAC
resolution, and the equivalent of 40 multi-levels
are achieved.
This filter attenuates sections of the DSD data that
exceed 100kHz. In the DAC, it provides fully
symmetric operation for 23 multi-levels.
Filter type
Audio CD Super Audio CD
FILTER 1
FILTER 2
FILTER 3
This filter has short pre-echo and post echo
characteristics. It carries a lot of sound
information; therefore very profound sound image
and a clear sound source are reproduced.
This characteristic is known as asymmetrical
impulse response. The post echo is slightly longer
than the pre-echo. The analog characteristics are
slow roll-off characteristics, with well-balanced
reproduction.
Impulse response is the shortest characteristic
of these filters. It provides high sound definition
along with a comfortable playback balance.
Note: When playing back the high sound quality stereo area in Super Audio CDs, the analog output level varies slightly in
each filter.
OPERATION
06.8.29, 1:52 PMPage 15