Presonus Eris User Manual download pdf (Page 7)

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Eris™ Series E4.5 Owner’s Manual

2.1.2. Power

IEC Power Connection. The Eris E4.5 accepts a

standard IEC C7 power cord. The power switch is

located on the front panel of the active E4.5.

AC Select Switch. The input-power voltage is set at the

factory to correspond with the country to which it was

shipped. Change the setting on this switch only if you are

using your Eris speakers in a country that uses a diﬀerent

standard voltage than is used in the country where you

purchased your Eris E4.5.

Note: These controls are only available on the active E4.5.

2.1.3. Acoustic Tuning Controls

High. Boosts or cuts all frequencies above 10 kHz by ±6 dB.

Power User Tip: The High control on the Eris E4.5 is a high-shelf

EQ and attenuates or boosts frequencies above 10 kHz. This EQ

is much like the treble control on a car stereo: It raises or lowers

the gain on all frequencies above the speciﬁed cutoﬀ frequency.

Shelving EQs can make big changes to the sound very quickly

by adding or removing an entire range of frequencies.

Mid. Boosts of cuts frequencies around 1 kHz by ±6 dB

Power User Tip: The Mid control is a peak EQ that

lets you boost or cut a speciﬁed frequency band (in

this case, a band about two octaves wide, centered

at 1 kHz). It’s capable of more subtle changes.

Low Cutoﬀ. Rolls oﬀ the level of all frequencies below the

speciﬁed frequency (80 or 100 Hz) at a slope of -12 dB/

octave. This can be defeated by setting it to Flat, in which

case, the monitor’s natural roll-oﬀ takes over.

Acoustic Space. Cuts the level of all frequencies below 1

kHz by the speciﬁed amount (-2 or -4 dB) to compensate for

the bass boost that occurs when the monitor is placed near

a wall or corner. This can be defeated by setting it to 0 dB.

Note: These controls are only available on the active E4.5.

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Presonus Eris User Manual Page 7