Marantz SA-7S1 SA-7S1 User Manual - English - Page 20
Filters, Filter operations - images
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ENGLISH OPERATION 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 Filter type Audio CD Super Audio CD FILTER 1 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 is a direct mode that does not perform any filtering on the DSD data. The original source data is reproduced without any alteration. FILTER 2 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. 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. FILTER 3 Impulse response is the shortest characteristic of these filters. It provides high sound definition along with a comfortable playback balance. This filter attenuates sections of the DSD data that exceed 100kHz. In the DAC, it provides fully symmetric operation for 23 multi-levels. Note: When playing back the high sound quality stereo area in Super Audio CDs, the analog output level varies slightly in each filter. 15