Presonus Eris Sub 8
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Eris Sub 8
Mac & Win
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The best subwoofer for Eris monitors.

The Eris Sub8 is the first subwoofer to join the lauded and best-selling Eris studio monitor line. We called it Eris because it’s been designed from the ground up to be part of the family; it compliments the voicing and frequency response of the modern Eris classics. Of course, they’ll play nice with other monitors, too, but if you’ve got a pair of Eris in your home or studio already, the Eris Sub8 is the single best subwoofer you can get to put a little boom in your room.

Maximize your frequency response and accuracy.

The surprisingly loud 100-Watt Eris Sub8 drops down to a molar-rattling 30Hz—a full 50Hz below the Eris 3.5s. This allows you to both rock harder and produce better mixes, as you’ll be hearing an accurate representation of your work. For EDM and hip-hop producers in particular, a sub is a must-have. The Eris Sub8 lets you naturally extend the reach of your Eris E3.5 or E4.5 monitors in a manner appropriate to smaller rooms; exactly where these monitors excel.

Total control and connectivity.

Thanks to robust configuration and I/O, you’ll be able to tailor your Eris Sub8 configuration exactly to your mixing and listening needs. You can connect your existing monitors via ¼” TRS or RCA, set the input level to your liking, and even invert the polarity. Most importantly, you get a High Pass Filter and a Low Pass Crossover control that ensures your Eris Sub8 starts working at the precise low-frequency point where your main monitors stop working. This makes sure you avoid the flubbery, smudged, low-end mess that one hears in redundant, duplicate, redundant bass reproduction that occurs without a crossover.

All work and all play.

While we’ve designed the Sub8 to compliment our smaller-form Eris media reference monitors, we also know that gamers, partiers, and movie buffs alike all enjoy some room-rattle now and again. So rest easy knowing that the Eris Sub8s will upgrade the performance of any powered speaker configuration in a home theatre or gaming rig.

Accuracy defined.

When you hear the low-frequency foundation of your mix accurately, you can make more informed decisions and create more translatable mixes. You’ll also have more fun.


8-inch, front-firing, paper-composite low-frequency transducer with high-elastisity rubber surround

Class AB amplifier: 100W peak (50W RMS) power

Input gain control (-30 dB to +6 dB, continuously variable)

Continuously variable lowpass filter (50 Hz to 130 Hz)

Defeatable highpass filter removes frequency content below 80 Hz from the full-range signal sent from the Eris Sub8 outputs to the main speakers

Left and right, balanced ¼-inch TRS and unbalanced RCA main inputs

Left and right balanced ¼-inch TRS and unbalanced RCA pass-through outputs for connecting satellite speakers

Polarity invert switch

Protection: RF interference, Output-current limiting, Over-temperature, Turn-on/off transient, Subsonic filter, External mains fuse

Technical Specifications


2- Balanced TRS


2- Unbalanced RCA



2- Balanced TRS (full range with 80 Hz HPF option)


2- Unbalanced RCA (full range with 80 Hz HPF option)



Frequency Response        30Hz 200 Hz

Low Pass Filter Frequency             50 130 Hz (variable)

Signal-to-Noise Ratio      >95dB (A weighted)

THD       0.05%

Amplifier Power 100Wpeak, 50W RMS

Power Consumption        100W

Amplifier Type    ClassAB

Peak SPL at 1m   113 dB

Woofer 8paper-composite with high-elasticity rubber surround, front-firing

Acoustic Port      Front-firingbass reflex

User Controls

Input Gain Range              -30to +6 dB

Polarity Switch   0 or180

Low Pass Filter Control   50Hz to 130 Hz

High Pass Filter Switch     On/Off


RF interference


Output-current limiting




Turn-on/off transient


Subsonic filter


External mains fuse



100-120V ~50/60 Hz or 220-240V ~50/60 Hz


Vinyl-laminated MDF


Width    9.8 (250 mm)

Depth    12.75 (324mm)

Height   11.6 (295 mm)

Weight  16.3 lbs (7.4kg)

As a commitment to constant improvement, PreSonus AudioElectronics, Inc., reserves the right to change any specification statedherein, at any time, without notification.

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