Behringer EPA900 Manual - Page 7

7 EUROPORT EPA900 User Manual 3.5 Speaker outputs The SPEAKER OUTPUTS connectors on the back of the unit are used to connect the supplied loudspeakers. 3.7 Effects unit The EPA900 is equipped with an internal stereo effects processor, which offers 100 different standard effects, including reverb, chorus, flanger, and echo, as well as various multieffects. It is permanently integrated into the mixer as a Send/ Return effect; i.e., an adjustable signal portion can be routed to the effects unit from every input channel. The selected effect is applied to the signal portions of the channels, and the signals are then mixed with the direct signals via the stereo bus. Fig. 3.5: Powered connectors for passive loudspeakers !! Caution The outputs are powered outputs, which put out a strong, amplified signal (not a low-level LINE signal!). For this reason, only PASSIVE loudspeaker systems can be connected. Other devices could get damaged. • If loudspeakers with an impedance of 4 Ω are used, the two outputs have a maximum power of 900 W. • If loudspeakers with an impedance of 8 Ω are used, the two outputs have a maximum power of 800 W. 3.6 Graphic equalizer The EPA900 is equipped with a 7-band graphic equalizer, which enables you to adapt the sound to the room conditions and your own ideas for the sound. The equalizer always processes the LEFT/MAIN and RIGHT/MAIN bus equally. Fig. 3.7: Internal 24-bit multieffects unit CLIP/SIG The CLIP and SIG LEDs provide information on the signal level on the effects unit. • When continuously lit up, the CLIP LED indicates a signal overdrive. In this case, the effects unit input level should be reduced through lowering of the Send level using the EFFECTS controls for the input channels. • The SIG LED signalizes that the effects processor is receiving a signal and is working. If the LED is not lit up, the input signal is too weak. PROGRAM (PUSH) You can turn the PROGRAM control knob to select an effects preset. Then press the knob to activate the selected effect. EFFECTS (LEVEL) The EFFECTS (LEVEL) control is used to adjust the effects signal volume. 3.8 Main Power Section The operating volume of the sound system is set via the main power section (MAIN LEVEL CONTROL). Fig. 3.6: Graphic equalizer section EQ ON You can activate the equalizer using the EQ ON switch. FBQ ON Using the FBQ ON switch, you can activate the feedback detection circuit. This function only has an effect if the equalizer is active. For every frequency that causes feedback, the corresponding LED on a slide control lights up. Lowering the displayed frequency minimizes feedback. Fig. 3.8: Control elements in the main power section LEFT/MAIN and RIGHT/MAIN The two controls are used to adjust the volume of the corresponding loudspeaker outputs. MODE With the MODE switch, the power amplifier section can be switched to stereo or mono mode. Depending on the setting, the limiter, which provides overdrive protection for the system, works in coupled stereo or independent mono mode. ◊ Always remember to set the switch according to the given application to avoid incorrect limiter behavior!