Loudspeakers Line Out; Low Impedance; High Impedance - Optimus AXD-30 Operating Instructions Manual

ENGLISH

6.8. Loudspeakers line out

The loudspeakers line out is effected by means of a transformer that
has low impedance outputs (4 – 8 – 16 Ω) and high impedance outputs
(50 – 70 – 100V).
The connection must be made between terminal "0" and the terminal
corresponding to the appropriate impedance or voltage.

6.8.1. Low impedance

One of these three outputs will be used when the loudspeakers do not have a line transformer, and it will be selected in
such a way that the loudspeaker line impedance is the same as the impedance of the amplifi er output contact.

6.8.2. High impedance

When working with the 50, 70 and 100V lines, it should be remembered that:
- The loudspeakers to be connected must have a line transformer.
- The total connected power will be the sum of the power absorbed by the loudspeakers and this must be
between 50% below and 20% above the rated power of the amplifi er.
Eng
- The power absorbed by a loudspeaker with a transformer is indicated on its terminals. This power is on the
100V line. If the transformer is connected to the 70V line, it will absorb half the indicated power, and if it
is connected to the 50V line, it will absorb a quarter of this power. A 30W transformer will absorb 15W if it
is connected to the 70V line and 7.5W if it is connected to the 50V line.
100V.
0
T1
A
10W
70V.
0
T1
B
10W
50V.
0
T1
C
10W
AXD-60 (See Fig. 17)
A. Total input power 60W.
Power absorbed by each 10W transformer = 10W.
B. Total input power 60W.
Power absorbed by each 10W transformer = 5W.
C. Total input power 60W.
Power absorbed by each 10W transformer = 2.5W.
AXD-120 (See Fig. 18)
A. Total input power 120W.
Power absorbed by each 20W transformer = 20W.
B. Total input power 120W.
Power absorbed by each 20W transformer = 10W.
C. Total input power 120W.
Power absorbed by each 20W transformer = 5W.
AXD-240 (See Fig. 19)
A. Total input power 240W.
Power absorbed by each 40W transformer = 40W.
B. Total input power 240W.
Power absorbed by each 40W transformer = 20W.
C. Total input power 240W.
Power absorbed by each 40W transformer = 10W.
18
AXD-30/60/120/240
Figure 17
AXD-60
T2 T5
10W
10W 10W
10W 10W
T2 T11
5W 5W 5W
10W 10W
T2 T23
2.5W
2.5W 2.5W
10W 10W
100V.
0
T6 T1
A
10W 20W
20W
10W
70V.
0
T12 T1
B
5W
10W
10W 20W
50V.
0
T24 T1
C
2.5W 5W
10W 20W
100V.
0
T1
A
40W
40W
70V.
0
T1
B
20W
40W
50V.
0
T1
C
10W
40W
Figure 16
Figure 18
AXD-120
T2 T5 T6
20W 20W
20W 20W 20W
T2 T11 T12
10W 10W
20W
20W 20W
T2 T23 T24
5W 5W
20W 20W 20W
Figure 19
AXD-240
T2 T5 T6
20W 20W
40W 40W 40W
T2 T11 T12
20W 20W
40W 40W 40W
T2 T23 T24
10W 10W
40W
40W 40W
AXD-30/60/120/240 v1.2
20W
10W
5W
20W
20W
10W