TOA Electronics A-903MK2, A-906MK2, A-912MK2 Output Connection (A-906MK2/A-912MK2)

To connect speakers to 8-ohm output (UNBALANCED DIRECT OUTPUT)
(A-903MK2)
8-ohm
Loosen the screw.
Place the impedance switch in 8-ohm position.
Tighten the screw.
Output Connection (A-906MK2/A-912MK2)
The speaker outputs of the amplifier are 4 ohms, 8 ohms, 25V and 70V.
Connect speakers to any one of these outputs.
Class 2 wiring may be used.
There are two types of output ;
8 ohms, 25V and 70V via output (matching) transformer
•4-ohm direct output.
The connecting method differs in each case. Refer to the following diagrams.
Note : Impedances indicated below imply total speaker system (load) impedances.
To connect speakers to outputs of : 8 ohms, 25V or 70V (BALANCED OUTPUT)
(A-906MK2/A-912MK2)
8-ohm
10.4-ohm(A-906MK2)/
5.2-ohm(A-912MK2)
25V line
83-ohm(A-906MK2)/
41-ohm(A-912MK2)
70V line
Loosen the screw.
Place the impedance switch in 8-ohm position.
Tighten the screw.
Note : Low-cut switch should be in "CUT" position.
Cut off unnecessary low frequency in TRANS OUTPUT to obtain best acoustic condition. The
900MK2 series amplifiers are characteristically flat even in the low frequency range. Thus, in TRANS
OUTPUT the acoustic effect and frequency-response characteristics may be altered.
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