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The PreSonus ERIS SUB8 is a compact 8-inch powered studio subwoofer that extends a monitor pair down to 30 Hz for accurate full-range 2.1 mixing in small rooms.
30 Hz extension: true low end for small-monitor setups.
100W peak Class AB: 50W RMS with up to 113 dB peak output.
Variable crossover: 50-130 Hz low-pass for seamless blending.
80 Hz high-pass: defeatable filter offloads bass from small monitors.
TRS and RCA: balanced and unbalanced in/out for easy 2.1 integration.
The PreSonus ERIS SUB8 is a compact 8-inch powered studio subwoofer that adds a true low end to small monitors, turning a stereo pair into a full-range 2.1 monitoring system. Its front-firing 8-inch paper-composite driver, driven by a Class AB amplifier rated at 100 watts peak and 50 watts RMS, reaches down to 30 Hz, so the foundation of a mix, the weight of a kick, the depth of a bass line, can finally be judged accurately instead of guessed. A variable low-pass filter, a defeatable 80 Hz high-pass filter for the connected monitors, and balanced TRS plus unbalanced RCA inputs and pass-through outputs make the Sub8 easy to integrate with Eris monitors and with other full-range studio monitors too. Note on naming: the sheet writes this model as “SUB 8”; the product name is Eris Sub8, distinct from the later Bluetooth-equipped Sub 8BT, and this listing describes the wired Sub8.
SuhaviMart lists the PreSonus Eris Sub8 as a compact studio subwoofer reaching down to 30 Hz on its PreSonus Eris Sub8 product page. This listing follows that published specification for the wired Sub8 model.
Why Choose PreSonus ERIS SUB8?
The PreSonus ERIS SUB8 is chosen because small monitors, however good, cannot reproduce the bottom octave, and mixes made without it tend to fail on bigger systems. By extending response to 30 Hz with a peak output of 113 dB, the Sub8 lets producers hear sub-bass problems, check low-end balance and judge translation before release, rather than discovering them on a club system or a car stereo. The defeatable 80 Hz high-pass filter is the key practical benefit: engaging it takes deep bass load off small monitors, cleaning up their midrange and letting them play louder with less strain, while the variable 50 to 130 Hz low-pass filter blends the subwoofer seamlessly with whatever monitors are connected. Its compact vinyl-laminated cabinet fits under a desk or beside it, making full-range monitoring possible in rooms where a large subwoofer simply would not fit.
Key Features
8-inch front-firing driver: paper-composite woofer with rubber surround for tight, musical sub-bass.
30 Hz low-frequency extension: reveals the bottom octave that small monitors cannot reproduce.
100W peak Class AB amplifier: 50 watts RMS with up to 113 dB peak output for small rooms.
Variable crossover: 50 to 130 Hz low-pass filter blends the sub with any monitor pair.
Defeatable 80 Hz high-pass: offloads deep bass from small monitors for cleaner mids and more headroom.
TRS and RCA connectivity: balanced and unbalanced inputs with pass-through outputs for a 2.1 setup.
Best Suited For
The PreSonus ERIS SUB8 suits home and project studios with small monitors, EDM and hip-hop producers, podcasters, video editors and anyone who wants fuller bass for music, movies and games in a small room. It is voiced to match Eris E3.5, E4.5, E5 and E5 XT monitors, but works with a variety of full-range studio monitors over TRS or RCA. It is a single compact subwoofer for a 2.1 system, not a large-room or live-sound subwoofer, and listeners who need Bluetooth connectivity should choose the separate Sub 8BT model instead, since this Sub8 is the wired version.
Setup and Connection Guide
Connect the audio interface or monitor controller outputs to the PreSonus ERIS SUB8 inputs, then connect the subwoofer’s pass-through outputs to the studio monitors, so the sub sits between source and monitors in the signal chain. Set the input gain to a moderate starting level, set the low-pass filter near the point where the monitors’ bass naturally rolls off, typically around 80 Hz for small monitors, and engage the 80 Hz high-pass filter so the monitors are relieved of deep bass duty. Play familiar reference material and adjust the subwoofer level until the bass feels like an extension of the monitors rather than a separate source, then fine-tune the low-pass frequency for the smoothest blend. Place the subwoofer near the front wall or under the desk, experiment with a few positions if bass sounds uneven, and avoid corners if the low end becomes boomy.
Frequently Asked Questions
Will the PreSonus ERIS SUB8 work with non-PreSonus monitors?
Yes. It is voiced for Eris monitors but works with a variety of full-range studio monitors over its balanced TRS or unbalanced RCA connections, with the crossover adjusted to suit the connected pair.
Where should the crossover be set on the PreSonus ERIS SUB8?
Start near the point where the connected monitors’ bass starts to roll off, commonly around 80 Hz for small monitors, then fine-tune the variable 50 to 130 Hz low-pass filter for the smoothest blend with the monitors.
Is the PreSonus ERIS SUB8 the same as the Sub 8BT?
No. The Sub 8BT is a different model that adds Bluetooth 5.0 wireless connectivity; this listing describes the wired Eris Sub8 without Bluetooth.
Buy with peace of mind. The PreSonus ERIS SUB8 Compact Studio Subwoofer comes with the official manufacturer’s warranty for India, valid from the date on your GST invoice. Pro Audio Video is a specialist audio video store, and every product we sell is brand new, sealed and sourced through authorised channels, so your warranty is honoured at brand service centres across India.
Official Indian warranty, as specified by the manufacturer
GST invoice with every order, needed for warranty claims
We help you raise and follow up warranty claims with the brand
Delivery and Shipping
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