Marantz SA-7S1 User Manual download pdf (Page 20)

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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

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Marantz SA-7S1 User Manual Page 20

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