Toa H-1 - Manual (Page 11)

11
7. Attach the grille to the speaker with its two mounting
screws.
8. Reattach the mounting bracket to the speaker with the
angle adjustment screw.
7. PROTECTION CIRCUITRY INFORMATION
• The speaker has built-in overload protection circuitry.
If there is an extremely high level input signal to the speaker, the overload protection circuitry is activated
and cuts off the signal input to the speaker component.
• A sudden drop of the sound volume level during speaker operation indicates that the overload protection
circuitry has been activated. In such a case, reduce the amplifier volume and wait. The protection circuitry is
automatically reset after approximately 10 seconds. After the circuitry is reset, set the volume at a lower
level than before.
Important Note
This overload protection circuitry does not completely protect the speaker component. Depending on the
nature of the excessive signal applied to the loudspeaker, there may be damage to the loudspeaker
components before the protection circuitry can operate. Also, depending on the duration of the excessive input
signal, the protection circuitry may be damaged and will not recover. Take special care that the excessive
input is not applied to the speaker during use.
8. EQUALIZATION
• The H-1 is designed to provide good quality sound without additional equalization. However, by equalizing it
as shown below, sounds can be made more powerful and intelligible.
• Using a digital signal processor, make the following equalization setting.
Filter Frequency Gain Q
HPF 118 Hz Q 0.707
PEQ 125 Hz +10 dB Q 1.800
PEQ 220 Hz - 6.5 dB Q 1.414
PEQ 5 kHz + 1.5 dB Q 0.305
LPF 15.8 kHz Q 0.500
[dB]
+20
+10
-10
-20
-30
-40
0
Frequency - Gain
20 50 100 500 1k 5k 10k 20k
[Hz]
[dB]
+20
+10
-10
-20
-30
-40
0
Frequency - Gain
20 50 100 500 1k 5k 10k 20k
[Hz]
Filter Frequency Gain Q
HPF 118 Hz Q 0.707
PEQ 125 Hz + 4 dB Q 1.800
PEQ 220 Hz - 6.5 dB Q 1.414
PEQ 5 kHz + 1.5 dB Q 0.305
LPF 15.8 kHz Q 0.500
[When not using a subwoofer]
[When using a subwoofer]