Cambridge Audio 651W User Manual download pdf (Page 6)

Front panel

1. Standby/On

Switches the unit between Standby mode (indicated by dim power LED)

and On (indicated by bright power LED). Standby mode is a low power

mode where the power consumption is less than 0.5 Watts. The unit

should be left in Standby mode when not in use.

When the 651W is switched out of Standby mode it will automatically

check for faults and allow the power amplier stages to stabilise before

un-muting the speaker outputs.

Note: The protection LEDs will ash whilst this check is being done.

Auto Power Down (APD)

This product has Auto Power Down enabled as default. After a period

of inactivity, the product will automatically switch to Standby. See later

section for further details.

2. Output

Indicates that the Left or Right output is active. The LED (light-emitting

diode) is on for an active output, off for inactive (i.e. muted).

3. Protection

If this LED is constantly on the 651W has detected a fault on either the

Left or Right channel and is protecting itself.

4. Clipping

This LED indicates that the 651W has detected that either the Left or

Right channel is being overdriven or clipped.

Clipping distortion is caused at high volume levels when the output

signal attempts to go outside the maximum voltage that the amplier

can provide, causing the tops of the signal to atten off.

Clipping

When the 651W detects clipping this LED will briey ash. If the clipping

reaches a dangerous amount that could damage the amplier or

attached speakers the unit will then go into protection.

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Cambridge Audio 651W User Manual Page 6