Presonus Audio electronic E8, E5 owner manual Power, Acoustic Tuning Controls

2	Hookup	Eris™ Series E5 and E8
2.1	Rear Panel Connections and Controls	Owner’s Manual

2.1.2Power

IEC Power Connection: Your Eris E5/E8 accepts a standard IEC power cord.

Warning: Do not remove the center grounding prong or use a ground-lift adapter, as this could result in electric shock.

Power Switch. This is the On/Off switch. The power status is indicated by an LED on the front of the cabinet.

AC Select Switch. The input-power voltage is set at the factory to correspond with the country in which it was shipped. Use 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 E5 or E8.

2.1.3 Acoustic Tuning Controls

High: Boosts or cuts all frequencies above 4.5 kHz by ±6 dB.

Power User Tip: The High control on the Eris E5/E8 is a high-shelf EQ and attenuates or boosts frequencies above 4.5 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 or cuts frequencies around 1 kHz by ±6 dB.

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. Can be defeated by setting it to Flat, in which case, the monitor’s natural rolloff takes over.

Acoustic Space: Cuts the level of all frequencies below 800 Hz 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. Can be defeated by setting it to 0 dB.