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EUROPOWER EP1500/EP2500
Applications 7
Power is supplied via an IEC connector. The matching cable [14]
is provided with the unit.
SERIAL NUMBER of your EUROPOWER. [15]
Here you can nd a detailed overview of the individual MODE [16]
SWITCHES functions ({9}).
Conguration switches (MODE SWITCHES)2.3
DIP-switchesFig. 2.3:
Clip limiter2.3.1
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 amplication 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 amp-
lier is overloaded. The drivers are thus protected from being
damaged.
Input lter2.3.2
The LF (high-pass) lter 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 lters 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 lter is
disengaged, frequencies below 5 Hz are cut to prevent damage.
You should set up the lters so they best suit the frequency res-
ponse of your speakers, since some speakers (e.g. bass reex
speakers) are particularly sensitive to over-excursion below the
listed frequency range.
The 50 Hz lter should be engaged when using broadband
speakers because the lter provides a moderate amplication
in the 100-Hz range, resulting in a fuller sound. The 30 Hz lter
is ideally suited for subwoofer operation as well as for broad-
band 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-channel mode (stereo)2.3.3
Both channels of your amp function independently from one
another in this operating mode, and each has its own input sig-
nal. 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 swit- +
ches for mono-bridged mode must be disengaged (dip
switches 6 and 7 in left position).
Parallel mode2.3.4
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 amplication, lter 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 con-
nectors to feed the signal into additional ampliers. 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 amplication,
lter and limiter settings is desired.
Mono-bridged mode2.3.5
This operating mode enables you to add up the respective vol-
tage 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, lter 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 ampli- +
er 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.
Applications3.
Running EUROPOWER ampliers in conjunction with +
8-Ohm speakers with a power rating of at least 2 x 260
Watts (EP1500) and 2 x 450 Watts (EP2500) is recom-
mended to assure optimal operation.
Differences between 2-channel, parallel 3.1
and mono-bridged operating modes
2-channel mode is the most common operating mode of ampli-
ers. Both channels operate fully independently from one another.
There is always a separate input signal as well as a separate
output signal.