Active Two-Way Speaker: The PreSonus Eris E8 powered studio monitor
speaker sports a 8" Kevlar low-frequency driver mated with a 75W Class-AB
amplifier, and a 1" silk-dome tweeter powered by a 65W Class-AB amplifier. It
can crank out a clean 102 dB SPL, peak. Frequency response is rated at 35 Hz to
Bass Reflex Enclosure: The E8 powered studio monitor speaker has a
front-ported enclosure made of vinyl-laminated, medium-density fiberboard (MDF).
Signal Inputs: The PreSonus Eris E8 provides balanced XLR, balanced
1/4" TRS, and unbalanced RCA line-level inputs. When both balanced connections
are in use, the TRS input will supersede the XLR input. The RCA input is summed
into the signal path. With this selection of inputs, you'll have no problem
hooking up the Eris E8 up with virtually any line-level source. If your signal
source has unbalanced 1/4" TS outputs, simply use a 1/4"-to-RCA adapter or
Controls: A combination of controls lets you create a linear response
for accurate monitoring and enables you to simulate different listening
environments, so you don't have to listen to mixes on your car, consumer
computer speakers, and home stereo to check how the music sounds with different
systems. Instead, you can adjust the Eris E8 studio monitor response and test
your mixes without leaving your studio.
- Input Gain: The Input
Gain sets the level of the speaker's input signal from your connected source
before it is amplified.
- Acoustic Tuning EQ: The Eris E8 provides three EQ controls in its
Acoustic Tuning section; High, Mid, and Low Cutoff. These controls enable
you to fine-tune the monitors and even to broadly approximate the sounds of
different types of speakers so you can hear what your mix might sound like.
- High: boosts or cuts all frequencies above 4.5 kHz by ±6 dB
- Mid: 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
- Low: rolls off the level of all frequencies below the specified
frequency (80 or 100 Hz) at a slope of -12 dB/octave
- Acoustic Space Switch: In addition to the Acoustic Tuning
controls, the Eris speaker offers a three-position Acoustic Space switch.
This switch controls a second-order, low shelving filter that cuts the level
of all frequencies below 800 Hz by a specified amount (-2 or -4 dB) to
compensate for the boundary bass boost that occurs when the monitor is
placed near a wall or corner. If you don't want to roll off those lows, set
it to 0 dB.
Protection Circuitry: Any loudspeaker is subject to an assortment of
environmental and performance problems, and the Eris monitor offers protection
from the most common of these factors.
- RF Shielding: RF shielding protects against radio frequencies
that could be induced into the signal and become audible.
- Thermal Protection: The Eris monitor also provides
over-temperature protection to avoid heat-related issues.
- Short Circuit: Current-output limiting prevents damage should
there be a short circuit on the speaker terminals.
- Subsonic Filter: Subsonic protection is used to filter out
extremely low-frequency vibrations that could interfere with the woofer's
- Soft Start Up: The integrated power amplifiers have a "soft
startup" so that you don't get damaging pops in the speakers when you power
Placement: Ideally, near-field monitors should be placed so that the
tweeters are at the same height as your ears when you are mixing. The Eris E8
speaker can be placed vertically or horizontally; when placed horizontally, two
E8 speakers should form a mirror image pair, with the tweeters on the outside.
The speakers should be separated so that the tweeters form an equilateral
triangle with your head. The monitors should be "toed-in" or angled, so that
they are pointed at you, not pointed straight ahead.
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