TOA Electronics HS-1500WT - Manual (Page 4)

4
5. INPUT TERMINAL SECTION
• As the Speakon connector is internally connected in parallel to the screw terminal as shown below, you can
use either of the two.
• The usable connector (on the cable end) that matches the NEUTRIK NL4MP Speakon is NEUTRIK NL4FX
Speakon.
• Input terminal connection diagram is as shown below.
7. ABOUT THE INPUT OVERLOAD PROTECTION CIRCUIT
The speaker system has a built-in input overload protection circuitry. If an excessive input signal is applied to
the speaker, the protection circuitry is activated and cuts off the signal input to the tweeters. A sudden drop of
the sound volume level during speaker operation indicates that the 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.
Note
This input overload protection circuitry does not completely protect the speaker component. Depending on the
nature of the excessive input signal applied to the speaker, there may be damage to the speaker components
before protection circuitry can operate. Also, if the excessive input signal is applied to the speaker for
extended periods of time, the protection circuitry may be damaged and will not recover. Take special care that
the excessive input signal is not applied to the speaker during use.
6. IMPEDANCE CHANGE
To change the impedance, use a standard screwdriver to
rotate the rotary switch on the speaker's rear panel to select
the desired input power.
This switch is factory-preset to 670 Ω.
Note
When using a high-impedance amplifier, never select 8 Ω,
as this will damage the speaker and the amplifier.
Be sure to turn the rotary switch to 8 Ω when using a low-
impedance amplifier.
[Rear]
Screw terminal
Speakon
[Input terminal connection diagram]
Speaker
Speaker Screw terminal
NEUTRIK NL4MP
Speakon
[Rear]
Rotary switch
Rotary switch
The figure represents factory-preset position.