Specifications

17
Functions and features (guideline)
1) Before switching on ‚mains‘, the Impedance Mode switch (rear panel) must be set to
match the minimum impedance of the connected loudspeaker(s).
2Ω / 4Ω (only for SCA4MR). When the total speaker impedance for one channel is
below 4Ω, set the impedance switch to 2Ω. In any other case set it to 4Ω
Impedance setting is shown in display [View Mode , Page 1].In addition, the 4Ω mode is
indicated by a yellow Led (next to impedance mode switch).
Do not operate the impedance mode switch while the power amp is in use.
2) After switching on Mains, System Init is started. The Display will show:
3) If - in [Command Mode, Page 4] the „Sine Wave Test“ has been activated, it will now
be executed. This test will check the the components which are connected to the
speaker outputs.
Within the programmed frequency window and at the preselected power output
[Command Mode , Page 2/3], the total impedance of the connected speaker systems
plus cables will be measured. The frequency sweep within the selected window will be
heard through the connected speakers.
Warning - Excessive output power may cause physical damage
The test result willbe shown for each Channel:
If in [Command Mode , Page 4] „Auto Power OFF“ has been activated, and if the
system detects any short circuit or excessive low impedance at one of the speaker
outputs, (R <<2Ω in 2Ω Mode or R << 4Ω im 4Ω Mode), the power amplifier will switch
to „Standby Mode“ (power supply off) in order to protect it against further overload or
damage.
In order to deactivate „Standby Mode“, the power must be switched off - and back to on.
In any case, the cause of setting the power amp to ‚Standby Mode‘ must be eliminated.
Check speaker cables for short circuits or loudspeaker systems for defects.