Crown Audio Operation, M Series Power Amplifiers, page, Front Panel Controls and Indicators

M Series Power Amplifiers

3 Operation

3.2 Front Panel Controls

and Indicators

A. Power Switch

Switch turns the amplifier on (“ ”) or off (“ 0 ”).

B. Reset Switch

This front-panel pushbutton is used to reset the circuit breaker that protects the power supply.

C. Power Indicator

Green LED indicates amplifier has been turned on and AC power is available.

D. Signal, Clip and Fault Indicators

Signal: A green LED for each channel flashes when a low-level signal (≥ 40 dBm) is present at the input.

Clip: A red LED for each channel turns on when distortion becomes audible in the amplifier output.

Fault: Normally off, this red indicator will blink under fault conditions. See Section 6, Troubleshooting.

E. Level Controls: Detented rotary level control for each channel.

3.3Back Panel Controls and Connectors

F. Barrier Block Inputs: May be wired bal- anced or unbalanced.

G.Neutrik® Combo Inputs: 1/4-inch phone and XLR inputs. May be wired bal- anced or unbalanced.

H.5-way Binding Post Outputs: One pair per channel; accept banana plugs, spade lugs or bare wire. Note: Binding post outputs on European models come with safety plugs installed to prevent European power-cord plugs from being inserted. The side entry positions for these connectors should therefore be used with European models.

I. IEC Power Connector

J. Fault Output: RJ11 jack allows monitoring of the amplifier’s Fault status from a remote location. See Section 4.2.

K.Stereo/Bridge-Mono Switch: Two-posi- tion switch selects either Stereo or Bridge- Mono operation.

L.Input Sensitivity Switch: Two-position switch selects either 1.4 V sensitivity or 26 dB gain.

M.Neutrik ®Speakon® Outputs: Two Neu- trik Speakon NL3MP output connectors (mates with NL4FC). See Figure 2.5 and Table 1 for connector wiring.

Operation Manual page 13