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13. COMBINATION WITH THE MT-200 MATCHING TRANSFORMER
Using the optional MT-200 matching transformer allows the speaker system to be connected to a high-
impedance amplifier. This matching transformer is best for use when the distance between the amplifier and
speaker is very long, or when multiple speaker systems are parallel-connected to a single amplifier.
Regarding the procedure for mounting the transformer on the speaker, refer to the instruction manual
enclosed with the MT-200.
14. EQUALIZATION USING A DIGITAL SIGNAL PROCESSOR
The speaker systems are to reproduce wide-band, high-efficiency sound even without the use of an equalizer.
However, sound quality can be made even clearer and more dynamic with the addition of a TOA digital signal
processor set as shown in the table.
[Filter characteristics for normal mode]
[Filter characteristics for low-frequency cut mode (speech applications) or when used with the FB-120
series Subwoofer System]
Filter Frequency Gain Q
HPF BW (24 dB/oct) 90 Hz
––
PEQ 800 Hz –3 dB 0.7
2.5 kHz –4 dB 2.997
5 kHz +5 dB 0.305
Filter Frequency Gain Q
HPF (12 dB/oct) 60 Hz
–
2.053
PEQ 65 Hz +2 dB 1.414
800 Hz –3 dB 0.7
2.5 kHz –4 dB 2.997
5 kHz +5 dB 0.305
Note
When using the processor with the HX-5 series and the FB-120 series, ensure that the wiring polarity of both
units is the same.