Toa SR-PP4 - Manual (Page 14)

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13. DIGITAL PROCESSOR FILTERING
13.1. Single-Amplifier Drive (Factory-Setting)
Although the speaker can be operated without a digital processor, it is recommended that the speaker be
used in conjunction with a digital processor for better sound reproduction. Recommended setting parameters
are as follows.
13.2. Bi-Amplifier Drive
Digital processing is required after the drive system has been changed to bi-amplifier operation. By inputting
an optimum signal to the woofer and tweeter using the digital processor, a high sound quality output can be
realized. Recommended setting parameters are as follows.
Channel Gain Polarity
Filter
Delay
TYPE Frequency Gain Q
LOW 0 dB Normal HPF (12 dB) 60 Hz – 1.226 0 ms
PEQ 63 Hz 2 dB 1.707
PEQ 1.5 kHz -5 dB 0.700
LPF (12 dB) 4.0 kHz – 0.500
HIGH -2 dB Normal HPF(12 dB) 4.0 kHz – 0.707 0.125 ms
PEQ 4.0 kHz 3 dB 2.997
PEQ 6.3 kHz -3 dB 1.512
PEQ 16.0 kHz 5 dB 1.414
TYPE Frequency Gain Q
HPF (12 dB) 60 Hz – 1.226
PEQ 16 kHz 5 dB 1.414