Dominion™ d108
Powered Subwoofer with 8-inch Subwoofer Driver, 500 watts
Born from JL Audio’s vast collection of advanced technologies, Dominion™ powered subwoofers combine a state-of-the-art subwoofer driver and an advanced Class D amplifier to deliver unmatched performance and value for a wide variety of compact applications.
Purpose-built to reproduce powerful low-frequency events with stunning impact and precision, the Dominion™ driver employs JL Audio’s exclusive DMA (Dynamic Motor Analysis) technology to produce higher output levels with reduced distortion, as well as improved dynamic tracking and resolution. As a result, Dominion™ subwoofers are capable of peak-to-peak excursions well in excess of 2.5-inches (63 mm - d108), and 2.7 inches (68 mm – d110), without distress or audible distortion.
Dominion™ amplifiers utilize an advanced Class D design in order to extract the most from the long-excursion driver platform. This design features a tightly regulated switching power supply, allowing the amplifier to generate prodigious amounts of unclipped output voltages. These technologies ensure that the Dominion™ powered subwoofers remain in their comfort zone, which is well beyond the point where most small subwoofers run out of power or driver capability.
With a host of signal processing features included, Dominion™ powered subwoofers can be integrated into most systems with ease. Low-pass signals are precisely guided, thanks to the onboard crossover’s 24 dB/octave Linkwitz-Riley alignment. Phase and polarity controls are onboard to aid in achieving the optimal acoustic transition between the subwoofer(s) and main speakers. Flexible input options are on-hand to accept either line-level or speaker-level signals. Connect a JLINK™ TRX system (sold separately) to the onboard Wireless Link port and enjoy the freedom to position your Dominion™ almost anywhere, up to 100 feet (30 meters) away from your source unit.
To contain the immense pressures created by the Dominion™ driver, each beautiful cabinet is carefully engineered and constructed using solid, CNC-cut, MDF material with extensive internal bracing and advanced assembly techniques. All Dominion™ powered subwoofers are built with pride and precision in JL Audio’s U.S. factory to deliver years of listening enjoyment.
Finish: Black Ash
Grille Finish: Black Fabric
Enclosure Construction: MDF
General Specifications
| Enclosure Type | Sealed |
| Enclosure Finish | Black Ash |
| Frequency Response (Anechoic) | 31 - 112 Hz (±1.5dB) -3 dB at 29 Hz / 119 Hz -10 dB at 21 Hz / 143 Hz |
| Effective Piston Area (Sd) | 32.18 sq in / 0.0208 sq m |
| Effective Displacement | 80 cu in / 1.3 L |
| Amplifier Power | 500 W RMS short-term |
| Power Mode | Automatic (Signal-Sensing) |
| Light Modes | N/A |
Signal Processing
| Unbalanced Inputs | Stereo or Mono (two RCA jacks) |
| Balanced Inputs | N/A |
| Speaker/High-Level Inputs | Stereo or Mono (removeable plug) |
| Input Grounding | Isolated or Grounded |
| Input Modes | N/A |
| Level Control | Variable, from full mute to +15dB over reference gain |
| Filter Mode | Low-Pass |
| Filter Slope (dB/Octave) | 24 dB |
| Filter Frequency Range | 25 Hz - 130 Hz |
| Filter Defeatable | Yes |
| Polarity | 0 or 180 degrees |
| Phase | Variable, 0- 280 degrees, referenced to 80 Hz |
| Extreme Low Frequency (E.L.F.) Trim | N/A |
| Line Outputs | N/A |
| Output to Slave | N/A |
| Calibration Mode | N/A |
Physical Specifications
| Width (W) | 10 in in / 254 mm |
| Height (H) | 11.37 in / 289 mm |
| Depth (D) | 13.23 in / 336 mm |
| Net Weight | 26.4 lb / 12 kg |