Presonus ERIS SUB 8BT

Expand the frequency range of your music production studio with the PreSonus Eris Sub 8BT, a front-firing 8" active subwoofer that's designed to complement full-range monitors like the Eris Studio 3.5 or Studio 5. Adding a subwoofer to your monitor setup enables you to hear the low-frequency foundation of your mix more accurately, allowing you to make better-informed decisions and create more translatable mixes.



The Eris Sub 8BT utilizes a 50W RMS Class-AB amplifier to power the 8" composite woofer, which offers a frequency response of 30 to 200 Hz and a max SPL of 103 dB. The rear panel has a comprehensive set of controls to fine-tune the subwoofer's performance including input gain, continuously variable low-pass filter for creating a seamless crossover transition, and a switchable high-pass filter that removes content below 80 Hz from the full-range signal sent to the monitors.

• 8" composite, low-frequency transducer


• Bluetooth 5.0 wireless audio stereo input


• Continuously variable low-pass filter (50 to 130 Hz) sets the upper frequency reproduced by the subwoofer


• Defeatable highpass filter removes frequency content below 80 Hz from the full-range signal sent from the Eris Sub 8BT outputs to the main speakers


• Input gain control (-30 to +6 dB, continuously variable) and polarity invert switch


• 50W RMS Class-AB amplification for up to 103 dB SPL, with a frequency response of 30 to 200 Hz


• Left and right, balanced ¼" TRS and unbalanced RCA main inputs


• Left and right balanced ¼" TRS and RCA outputs

Box Contains

Presonus ERIS SUB 8BT


• 1 x Power Cord