3. DIMENSIONS
(MOBILE MOUNT USE 15W)
TOA Corporation
PAGING HORN SPEAKER
model SC-632 AS
RATED POWER 30W
IMPEDANCE 8
MADE IN INDONESIA
4. HOW TO USE
4.1. Handling Precautions
●
Be sure to note the following polarities when multiple speakers are use in the same location. Incorrect connections
could result in no bass output or decreased volume.
Black speaker cable: Positive (+), White speaker cable: Negative (-) or COM
Connect the cables to other cables of the same colors in parallel connections, and to cables of different colors in
series connections.
●
To avoid amplifier failure, do not simultaneously connect both low- and high- impedance speakers to the amplifier.
Ensure that only one type is connected.
Notes: (1) “Low-impedance” refers to speakers having no built-in matching transformer.
(2) “High-impedance” refers to speakers having a built-in matching transformer.
4.2. Connections
When using two or more speakers, all connected speakers must have identical impedance and input ratings.
(1) The total speaker impedance must be equal to the amplifier output impedance. If the total speaker impedance is
less than the amplifier’s output impedance, the speakers or amplifier could fail.
(2) When parallel-connecting all speakers, the total rated input of all speakers must be greater than the amplifier
output.
Note: It is highly recommended that solid wire speaker cable with diameter of over 2 mm or strand wire of over
3.5 mm
²
be used to minimize transmission loss. When there are long distances between amplifier and
speaker (30 – 50), connect an optional matching transformer to convert the speakers to high-impedance
operation.
[Front]
[Side]
[Rear]
Black (+)
White (-)
or COM
Amplifier
Black (+)
White (-)
or COM
Amplifier
Parallel connections
Series connections
Unit: mm