NAD C270 Front Panel Controls . Power On/Off, Stand-By/Protectionindicator, Bridge Mode Indicator

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FRONT PANEL CONTROLS (FIGURE 2)

1. POWER ON/OFF

Press this button to switch the amplifier on or off. The Power On/Standby (No. 2) indicator located just above the power button and Protection indicator will light up. After a few seconds, the Protection LED will turn off, indicating that the amplifier is ready for use.

The C270 can also be remotely switched from On to Stand-by and vice-versa using the 12V trigger input on the back panel. For the 12V trigger input to work, the C270 must first be turned on by means of the Power switch, and the switch must be left in this position. Using the 12V trigger source component, switch its 12Vtrigger output to on and off. The C270’s Trigger Input will now follow the source component’s 12V trigger output. Ensure that the Auto Trigger switch on the back panel is in the AUTO position and that the 12V trigger input is connected properly. Refer to section “12V Trigger In” in the chapter above for more information.

NOTE: In Stand-by mode the C270 uses very little power. However, it is recommended that you switch the unit totally off if it is not going to be used for more than a couple of days. Switch off completely by pressing the POWER button on the front panel (No. 1), all lights will extinguish.

2. STAND-BY/PROTECTION INDICATOR

Upon switching Power on, the indicator will light up red and after a short pause turn to green to indicate the amplifier is ready for use.

In cases of serious abuse of the amplifier, such as overheating, excessively low loudspeaker impedance, short circuit, etc. the amplifier will engage its Protection circuitry. The indicator will light up red and the sound will be muted. In such a case, turn the amplifier off, wait for it to cool down and/or check the speaker connections, making sure the overall loudspeaker impedance doesn’t go below 4 ohms or 8 ohms in Bridge Mode. Once the cause for the protection circuitry to engage has been removed, switch the amplifier On again.

The diagram below shows the operation of the Stand- by/protection indicator:

	Green	Amber	Red
Normal Operation	•
Stand-by		•
Protection			•

3. SOFT CLIPPING™ INDICATOR

The green SOFT CLIPPING™ indicator shows that the Soft Clipping™ mode is engaged. Refer also to chapter “Rear Panel Connections”, section 7; “Soft Clipping™” for more information.

4. BRIDGE MODE INDICATOR

The BRIDE MODE indicator lights up (amber) when the C270 is switched to Bridge Mode. Refer also to chapter “Rear Panel Connections”, section 6, “Bridge Mode” for more information.

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