TOA bs-1030 Manuel D’Utilisation

11

• The speaker's tweeter has built-in overload protection circuitry. (The woofer does not have the circuitry.) 

If there is an extremely high level input signal to the tweeter, the overload protection circuitry is activated and
cuts off the signal input to the tweeter.

• 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 ten seconds. After the circuitry is reset, set the volume at a lower
level than before.

Caution
This overload protection circuitry does not completely protect the tweeter. Depending on the nature of the
excessive signal applied to the speaker, there may be damage to the speaker 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.

• The H-3 and H-3WP speakers are designed to provide good quality sound without additional signal

processing. However, by equalizing them as shown below, sounds can be made more powerful and
intelligible. 

• Using a digital signal processor, use the following equalization settings.

[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

HPF

PEQ

PEQ

PEQ

PEQ

Frequency

63 Hz

100 Hz

220 Hz

500 Hz

5,000 Hz

Gain

+9 dB

–8 dB

+5 dB

+1.5 dB

Q

0.707

2.871

2.871

2.871

0.305

Filter

HPF

PEQ

PEQ

PEQ

PEQ

Frequency

63 Hz

100 Hz

220 Hz

500 Hz

5,000 Hz

Gain

+5 dB

–8 dB

+5 dB

+1.5 dB

Q

0.707

2.871

2.871

2.871

0.305