4. INPUTS 1 - 4
The inputs 1 - 4 (14) are electronically balanced. With a sensitivity of 775 mV = 0 dB, they are meant for the connection of common control pre-amplifiers. In case off ground potential inputs are needed, the amplifier inputs are prepared to be retrofitted with input transformers of the type NRS 90208 (per input). Using the ROUTING switch (15) allows parallel operation of the inputs 1 - 4, providing the through connection of the input signal, when feeding the identical program to several power amplifiers. The correct input level can be set by using the level controls (13).
Hinweis | Visual determination of the ROUTING switches’ | ROUTING | Switch |
| required settings can be established by marking the | | | | |
| | | | |
| corresponding symbols, located next to the switches, | | | | |
| | | | |
| using a permanent maker. | ON | OFF |
Diagram 1 Input connections
Diagram 2 NF cable for coupled operation of two DPA 4410
5. OUTPUTS
5.1POWER OUTPUT
All power outputs are balanced and off ground potential. The outputs are presetted by DYNACORD for the connection of 100 V speaker systems. The connection is achieved through plugging the 8-pole socket into the connection strip (17). Using the output transformer switch, the output voltage can be changed to 70 V, 50 V and 20 V (see also paragraph 8). In the 20 V position, the operation of low impedance speakers with a load of 4 ohms is possible.