User's Manual

Table Of Contents

2 Connections and Controls

2.1 Rear Panel

Eris®-series E3.5/E3.5 BT/E4.5/ E4.5 BT

Owner’s Manual

2 Connections and Controls

Each Eris media reference monitor pair consists of one active speaker

and one passive speaker. Nearly every connection is located exclusively

on the active speaker. This speaker provides signal and power for the

passive speaker. The exceptions are the bare-wire connectors, which send

power and signal from the active speaker to the passive speaker.

2.1 Rear Panel

2.1.1 Inputs

Line-level Inputs. The Eris active speaker provides a choice of two pairs of

inputs on the rear-panel: left and right balanced ¼” TRS and left and right

unbalanced RCA. These inputs accept a line-level signal from an audio

source and feed that signal to each monitor’s power ampliﬁer. These inputs

are provided to enable ﬂexible connectivity, not for connecting multiple

sources to your speakers simultaneously. A third 1/8” stereo input is available

on the front panel, please see Section 2.2 for more information.

Power User Tip: The left inputs (balanced or unbalanced) send signal to the ampliﬁer

that powers the active speaker; and the right inputs send signal to the ampliﬁer that

powers the passive speaker. PreSonus recommends that the active speaker be placed on

the left side of your mixing space and the passive speaker be placed on the right.

However, if you prefer to have the controls located on your active monitor placed on the

right side of your workspace, be sure to reverse the inputs from your audio source to

maintain the correct stereo image.

2.1.2 Power

IEC Power Connection. The Eris active speaker accepts a standard IEC C7 power

cord. The power switch is located on the front panel of the active speaker.

2.1.3 Acoustic Tuning Controls

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

Power User Tip: The High control is a high-shelf EQ and attenuates or boosts frequencies

above 10 kHz. This EQ is much like the treble control on a home or 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.

Low. Boosts of cuts frequencies around 100 Hz by ±6 dB.

Power User Tip: The Low control is a low-shelf EQ and attenuates or boosts frequencies

below 100 Hz. This function is the equivalent to the Bass control on a home or car stereo:

It raises or lowers the gain on all frequencies below the speciﬁed cutoﬀ frequency.

Shelving EQs can make big changes to sound very quickly by adding or removing an

entire range of frequencies.