Protection Circuitry Information; Equalization - Toa H-2 Operating Instructions Manual

8. 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.

9. EQUALIZATION

• The H-2 and H-2WP are designed to provide good quality sound without additional equalization. However,
by equalizing them as shown below, sounds can be made more powerful and intelligible.
• Using a digital signal processor, make the following equalization setting.
[When not using a subwoofer]
Filter Frequency
HPF 63 Hz
PEQ 100 Hz
PEQ 200 Hz
PEQ 5 kHz
LPF 15.8 kHz
[When using a subwoofer]
Filter Frequency
HPF 63 Hz
PEQ 100 Hz
PEQ 200 Hz
PEQ 5 kHz
LPF 15.8 kHz
10
Gain Q
Q 0.707
+10 dB Q 1.871
- 5 dB Q 1.414
+ 1.5 dB Q 0.305
Q 0.500
Gain Q
Q 0.707
+ 2.5 dB Q 1.871
- 5 dB Q 1.414
+ 1.5 dB Q 0.305
Q 0.500
[dB]
+20
+10
0
-10
-20
-30
-40
20 50 100
500
Frequency - Gain
[dB]
+20
+10
0
-10
-20
-30
-40
20 50 100
500
Frequency - Gain
1k 5k 10k 20k
[Hz]
1k 5k 10k 20k
[Hz]