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Blue Sky Sub 8 Powered Subwoofer

Regular price $199.00 Sale price

Compare at $229.00

This used Sub 8 is fully functional and in very good condition. Comes with removable mesh cloth grill. 

The Blue Sky SUB 8 Universal speaker adds true low frequency extension to your existing near-field monitors with a sealed box design for more "slam" and a bass response down to 30Hz and below. A single 8" high excursion woofer features a vented motor for low power compression, and is powered by a low-distortion 100W discrete symmetrical bipolar amplifier. The Blue Sky SUB 8 Universal features built-in 2.1 bass management, along with dual independently tunable state variable high-pass and low-pass filters (50Hz-160Hz) with 4th order slopes, which adjust the crossover point to ensure optimum system response. 

Speaker Enclosure

  • .75" MDF with 1" front and rear baffle
  • Isolation feet included
  • Dimensions: 13"H x 16"W x 13.37"D (15.76" with heatsink and grille)
  • Weight 48.5 lbs. (22kg)

8" Hemispherical Subwoofer

  • 8" high excursion woofer
  • Vented motor structure
  • Cast aluminum frame
  • 2" voice coil
  • Aluminum alloy cone

Electrical Specification

  • Input Voltage: 115/230 VAC 50/60Hz switchable
  • Wattage: 200 Watts
  • Fuse: 115VAC 2A - 250 V 5x20mm (Time Delay or Slo-Blo), 230VAC 1.25A - 250 V 5x20mm (Time Delay or Slo-Blo)


  • Discrete symmetrical bipolar design
  • 100W RMS into 4 ohm
  • .01% THD + noise at rated power @ 100 Hz
  • XLR balanced input
  • Adjustable gain control
  • Voltage sensitivity: 100mv=90dB SPL@1m
  • Frequency response (SUB IN - anechoic): 35-200Hz
  • Typical in room response (SUB IN): 20-200Hz (3000 cubic feet)


  • Input impedance: 20K balanced
  • Common mode rejection: 40dB typical @ 60Hz
  • Maximum input level: +24dBu balanced
  • Output impedance: 200 ohms balanced
  • Nominal gain: 0dB
  • SUB IN low pass filter: None

Switchable Filter Settings

    SAT 5 Mode

    • High pass filter: none (uses filter in SAT 5)
    • Low pass filter: 80Hz 4th Order

    Universal Mode

    • Dual independently tunable state variable high pass and low pass filters
    • Frequency range: 50Hz-160Hz
    • Filter slope: 4th order