Presonus Eris E4.5 Near Field Active Studio Monitor (Pair)

Product ID: 104233

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  • 4.5 inch Kevlar woofer delivers a cleaner overall sound
  • 1 inch ultra-low-mass silk-dome tweeter ensures a smooth high-end
  • 25 watt class AB amplification per monitor
  • Acoustic space settings for easy integration into any studio
  • Acoustic tuning controls to flatten response
  • Compact design so monitors can slip into any setup easily
  • Extensive connectivity options for pretty much any line-level sound source


The Presonus Eris E4.5 active studio monitor delivers an uncompromising output that offers an honest representation of your mix. Rather than hiding or masking poorer sounding parts of the mix, the Eris allows you to take total control over your sound.

As with all their products, Presonus have built the Eris E4.5 with acoustically reliable components in order to preserve sound quality, with impeccably designed Kevlar low frequency transducers, and low-mass silk-dome tweeters that require little effort in order to produce a crystal-clear output, whilst the Class AB amplifier in each monitor guarantees a steady and reliable response. The lightweight design makes placement simple in the studio, as each one is easy to manoeuvre.

Flexible control in any environment

The Eris E4.5 has built in Acoustic Tuning controls, which allows you to shape the response of each monitor to fit in with your own studio environment. On the rear panel you'll find Mid and High control knobs, which allow you to shape the signal output. Therefore, if you find that either the Mids - centred on 1kHz - or Highs are too powerful (or not powerful enough), you can attenuate the monitor output to create a sweetly balanced sound. Though the aim is to keep the settings as close to 0 as possible, you can add or cut by a huge -6db to 6dB range.

As well as the EQ section, there is a three way Acoustic Space switch, which controls a second-order, low shelving filter that cuts all frequency level below 800Hz by an amount of your choosing. Depending on your desired speaker placement, you have the choice of selecting presets of 0dB, -2dB or -4dB. The reason for this is to offset boundary bass boost that occurs when the monitors are placed near a wall or corner, a very useful feature that goes a long way to making things simpler when placing your speakers.

Protection built-in

The prevalence of signal interference from various sources in a studio dictated Presonus' built-in speaker protection. With radio-frequency interference, electrical appliances, and heat all playing a part in causing signal degradation, certain measures have been taken to minimise any issues. RF shielding protects against radio frequencies becoming audible; over-temperature protection prevents heat-related issues. Current-output limiting prevents unwanted blowouts should a circuit short or cut out, whilst subsonic protection filters out extreme low frequency signals that could damage or affect the woofer's performance. Finally, the Eris E4.5 has a "soft start up" feature that prevents 'pops' that can occur when you power up the monitors.

Getting connected

The rear panel is home to a range of connectivity options including: balanced TRS left and right inputs; RCA unbalanced line left and right inputs; and bare-wire inputs for each speaker. The balanced TRS inputs are perfect for minimising noise, but the range of options make it easier for you to connect whatever equipment you have easily. On the front panel there is an unbalanced 1/8" inch auxiliary input for connecting smartphones, mp3 players, or whatever you like, as well as a direct headphone output for silent monitoring.

It is clear to see that with the Presonus Eris E4.5 active studio monitors, the design team have excelled themselves. By offering a range of features that are normally associated with monitors carrying a heftier price tag, Presonus have opened things up significantly, once again delivering a high-performance product at an entry-level price. If you're looking for a pair of compact studio monitors that are simple to set up, easy to transport if needed, and above all sound absolutely stunning, then the Eris E4.5 is perfect.

ModelEris E4.5 Near Field Active Studio Monitor (Pair)
Dimensions (H x W x D) 241 x 163 x 180 mm - per monitor
Weight5.9kg - per pair
Connectivity 1 - Stereo 1/8"
2 - Balanced 1/4” TRS
2 - Unbalanced RCA
Frequency Response 70 Hz - 20 kHz
Crossover Frequency 2.8 kHz
LF Amplifier Power 25W per monitor
Peak SPL (@ 1 metre) 100 dB
LF Driver 4.5" Kevlar
HF Driver 1” silk dome
Input Impedance 10 kOhms
Volume Range A-type taper
MF Control Variable (-6 to +6 dB)
HF Control Variable (-6 to +6 dB)
Low Cut Flat, 80 Hz, 100 Hz
Acoustic Space Flat, -2 dB, -4 dB
Protection RF Interference
Output-current limiting
Turn-on/off transient
Subsonic filter
External mains fuse
Power 100-120V ~50/60Hz or 220-240V ~50/60Hz
Cabinet Material Vinyl-laminated, medium-density fibreboard

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