Behringer EP1500 manual Configuration switches Mode Switches, Clip limiter

EUROPOWER EP1500/EP2500

These are the Speakon® outputs (channels 1 and 2). When running the unit in mono-bridged mode (see chapter 2.3.5), please use the channel 1 output exclusively. For further information on Speakon® connectors please refer to chapter 4.1.

These are the output terminals (channels 1 and 2). When running in mono, please make sure to use both middle connectors to connect your loudspeaker.

BREAKER (automated fuse). After eliminating the cause of faulty operation, simply depress the BREAKER and power up the unit again. The BREAKER acts in place of common discardable fuses.

+Attention: Before engaging the BREAKER switch, you should power down the unit (POWER switch set to OFF)!

Power is supplied via an IEC connector. The matching cable is provided with the unit.

SERIAL NUMBER of your EUROPOWER. Please take the time and send us the completely filled out warranty card within 14 days of the date of purchase. You may also register online at www.behringer.com.

Here you can find a detailed overview of the individual MODE SWITCHES functions ( ).

2.3 Configuration switches (MODE SWITCHES)

Fig. 2.3: DIP-switches

2.3.1 Clip limiter

When the input signal connected to your amp is too high, you end up with a distorted output signal. To prevent this, both channels of your EUROPOWER feature a clip limiter that can be engaged or disengaged selectively. The limiters automatically recognize distortion and lower amplification until distortion is reduced to a tolerable level. To preserve the dynamic characteristics of the signal when low distortion levels are occurring, the clip limiters function with moderate suppression. Use switches 1 (ch. 1) and 10 (ch. 2) to activate the clip limiters.

When using broadband loudspeaker systems, the clip limiter reduces high frequency distortions which occur when an amplifier is overloaded. The drivers are thus protected from being damaged.

2.3.2 Input filter

The LF (high-pass) filter removes frequencies below 30 and 50 Hz respectively. The reproduction of the signal’s bass portion is thus optimized, since ultra-low, distracting frequencies are eliminated, and more power is available for the reproduction of the wanted segment of the signal. Engaging and disengaging the filters is done by using the switches 3 (ch. 1) and 8 (ch. 2). Switches 2 (ch. 1) and 9 (ch. 2) determine the cut-off frequency. As long as the filter is disengaged, frequencies below 5 Hz are cut to prevent damage.

You should set up the filters so they best suit the frequency response of your speakers, since some speakers (e.g. bass reflex speakers) are particularly sensitive to over-excursion below the listed frequency range.

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 dis- engaged 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.

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.

6 2. CONTROL ELEMENTS