Toa A-903MK2 - A-903 MK2: Speaker connection to unbalanced DIRECT output; A-906 MK2 and A-912 MK2: Speaker connection to transformer-balanced output

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6.2.2. A-903MK2: Speaker connection to unbalanced DIRECT output
DIRECT
4Ω 8Ω
70V
25V
COM
8 Ω
1, 3
Impedance selector switch
2
[Impedance selector switch setting]
Step 1. Loosen the screw.
Step 2. Shift the impedance selector switch to "8 Ω" position.
Step 3. Retighten the screw.
This type of output allows speaker connection to 8 Ω terminal only.
6.2.3. A-906MK2 and A-912MK2: Speaker connection to transformer-balanced output
DIRECT
4Ω 8Ω
70V
25V
COM
8 Ω
25 V line
A-906MK2: 10.4 Ω
A-912MK2: 5.2 Ω
1, 3
70 V line
A-906MK2: 83 Ω
A-912MK2: 41 Ω
Impedance selector switch
2
[Impedance selector switch setting]
Step 1. Loosen the screw.
Step 2. Shift the impedance selector switch to "8 Ω" position.
Step 3. Retighten the screw.
It is highly recommended that the low-cut switch be placed in the ON position to cut off unnecessary low
frequency. This is because the built-in transformer cannot produce low frequencies though the unit has flat
response even in low-frequency range.
This type of output allows speaker connection to one of 8 Ω, 25 V, or 70 V terminal.