Date: 2017-06-28
PPA DSP amplifier user manual
21
Figure 11 ST8 Pinout
Table 3 PPA2200 / X-PRO speaker connection (ST100, 300, 500)
Connector
Pin
Description
ST100
1
CH1 OUT+
The amplified speaker signal of channel 1 is available on this pin
ST100
2
CH1 OUT-
This pin is used for the GND signal of the channel 1 speaker
ST300
1
CH2 OUT+
The amplified speaker signal of channel 2 is available on this pin
ST300
2
CH2 GND
This pin is used for the GND signal of the channel 2 speaker
ST500
1
CH3 OUT+
The amplified speaker signal of channel 3 is available on this pin
ST500
2
CH3 GND
This pin is used for the GND signal of the channel 3 speaker
8.
Preset or Source Selector
If you intend to implement a preset or an input source selector use ST8
(MicroMatch). Connect a Gray-coded encoder with max. 15 positions.
Four Audio is able to provide encoders and PCBs.
Figure 11 shows the pinout of ST8. Terminal 1..4 are used to select
input source, terminal 5..8 select the preset.
Table 4 selector truth table (low-active)
Preset No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Term.inal
1 / 5
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Terminal
2 / 6
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Terminal
3 / 7
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Terminal
4 / 8
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