Behringer EUROPOWER EP2000 Manual - Page 7

7 EUROPOWER EP4000/EP2000 User Manual The 50 Hz filter should be engaged when using broadband speakers because the filter provides a moderate amplification in the 100-Hz range, resulting in a fuller sound. The 30 Hz filter is ideally suited for subwoofer operation as well as for broadband cabinets. The "Off" setting should be used only for special applications (e.g. studio applications), in which recognizing and subsequently removing infra-sound is important. 2.3.3 2-channel mode (Stereo) Both channels of your amp function independently from one another in this operating mode, and each has its own input signal. Two independent speakers are connected at the outputs. To activate this operating mode, please set the MODE SWITCHES 4 and 5 to "STEREO". ◊ When running the unit in two-channel mode, the switches for mono-bridged mode must be disengaged (dip switches 6 and 7 in left position). 2.3.4 Parallel mode Running in parallel mode enables you to feed a signal via one of the inputs into both outputs. Each channel drives its own loudspeaker with independent amplification, filter and limit characteristics. To link the inputs, set the MODE SWITCHES 4 and 5 to "PARALLEL INPUTS". ◊ Mono-bridged mode switches must be disengaged when running in parallel mode. With inputs set to parallel, you can use the remaining input connectors to feed the signal into additional amplifiers. This means that the channel 2 inputs function as outputs. The parallel mode is well-suited for applications in which driving two speakers with the same signal but with separate amplification, filter and limiter settings is desired. 3. Applications ◊ Running EUROPOWER amplifiers in conjunction with 8-Ohm speakers with a power rating of at least 2 x 400 Watts (EP2000) and 2 x 750 Watts (EP4000) is recommended to assure optimal operation. 3.1 Differences between 2-channel, parallel and mono-bridged operating modes 2-channel mode is the most common operating mode of amplifiers. Both channels operate fully independently from one another. There is always a separate input signal as well as a separate output signal. Examples: • 2-channel (stereo) playback • Two independent mono signals, e.g. instrument signal and monitor mix • Bi-amp operation, whereby bass frequencies are run on channel 1, and high frequencies on channel 2 (see chapter 3.2 "Bi-amping") R Stereo out L Input channel 1 XENYX X2222USB Mixing Console 2.3.5 Mono-bridged mode This operating mode enables you to add up the respective voltage of both channels and use it to drive a single loudspeaker. The voltage is therefore doubled, the peak power is quadrupled, and program power is roughly three times as high as that of the individual channels. The input, output, gain, filter and limiter controls belonging to channel 1 are used when running in mono-bridged mode. The controls belonging to channel 2 are not used. To prevent signal cancellation due to internal phase inversion, the GAIN control belonging to channel 2 must be turned to its left-most position. Use this operating mode to route the power from both channels to a single 8-Ohm or 4-Ohm load. To do so, set up the switches 6 and 7 to "BRIDGE MODE ON". To use the binding posts as your output, you MUST use the two middle posts only. ◊ The mono-bridged mode puts added demands on amplifier and speakers. Excessive distortion may occasionally completely mute the amp's outputs as well as cause permanent damage to the speakers. Please assure that your speakers (minimal impedance 4 Ohms) as well as the cables used can handle the extra power generated in this mode. EUROPOWER EP2000 (Stereo Mode) Input channel 2 EUROLIVE B1520 PRO Full range loudspeaker Fig. 3.1: 2-channel mode