Dynacord DSA 8805 User Manual download pdf (Page 14)

DIGITAL SYSTEM AMPLIFIER

14 Owner‘s Manual

3 Operation

3.1 Volume Control

In DUAL and PARALLEL mode, the level controls LEVEL on the power amp’s rear panel are used to control

the amplification of the corresponding channel. The scale values are given in dB. Turning the control to the

right increases and turning it to the left decreases the volume. In BRIDGED mode operation, the output

volume for a pair of outputs is only controlled by the level control of the channel with odd number (1, 3, 5 or

7), the setting of the channel with even number (2, 4, 6 or 8) is ignored.

3.2 Indications

PROTECT

The PROT LED lights indicating that one of the internal protection circuits against thermal overload, short-

circuit, Back-EMF, HF-occurrence at the output, etc., has been activated. In that case, the connected load is

separated from the power amps to prevent the connected loudspeaker systems and the power amplifiers as

well from being damaged. Whatever caused the fault – e.g. a short-circuited speaker cable – needs to be

remedied. In case of thermal overload you have to wait until the power amplifier automatically regains

normal operation.

MUTE

The MUTE LED lights red whenever the power amp’s output signal is being muted, which happens when

manually muting the output signal via IRIS-Net.

-30dB...LIMIT

Level indication is realized via vertical LED chains on the power amp’s front panel that individually indicate

the actual levels of each channel at -30dB, -10dB and -3dB below full modulation. The LIMIT LED lights as

soon as the integrated dynamic audio limiter is activated and the power amplifier is driven at the clipping

limit or generally at its maximum capacity. Short-term blinking is not a problem, because the internal limiter

controls input levels of up to +21 dBu down to a THD of approximately 1%. If, on the other hand, the LIMIT

LED light constantly, reducing the volume is recommended to prevent the loudspeaker systems connected

from being damaged by probable overload.

POWER

The POWER LED lights green when the power amplifier is on. If the POWER LED does not light, despite

the fact that the amplifier has been switched on, this indicates that the power amp is not connected to the

mains or the primary fuse has blown.

STANDBY

The STANDBY LED lights yellow when the power amp is in standby mode. Standby mode reduces the

amp’s power consumption to an absolute minimum. Activating the standby mode is possible via IRISNet or

the POWER REMOTE port at the amp‘s rear panel.

IRIS-Net

The IRIS-Net LED lights blue if an IRIS-Net compatible remote control module has been installed in the

power amp’s extension slot and successful data communication has been established. The IRIS-Net LED

blink slowly whenever the “Find” function in IRIS-Net is being used to locate a power amplifier in the rack.

3.3 Standby Mode (POWER REMOTE)

POWER REMOTE provides a simple way to remotely power-on/off the power amplifier. The

POWER REMOTE function is only useful for appliances not employing a Remote Control

Modul. Controlling appliances with Remote Control Module installed per REMOTE

CONTROL is practically pointless. Leaving the pins of POWER REMOTE socket open the

appliance power is switched on. When connecting the pins the applicance enters standby

mode.

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Dynacord DSA 8805 User Manual Page 14

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