JL Audio Dominion d108 – 8-Inch Powered Subwoofer, Gloss Black or Ash Black

The Garmin link is for the JL Audio Dominion d108-GLOSS, part number 010-03812-00, featuring an 8-inch driver, 500-watt amplifier and high-gloss black finish.

Product Description

Compact dimensions. Powerful bass. Flexible installation.

The JL Audio Dominion d108 delivers powerful, articulate bass from a remarkably compact sealed subwoofer. Combining an advanced 8-inch long-excursion driver with a 500-watt Class D amplifier, it brings JL Audio's low-frequency engineering to high-performance stereo systems, media rooms and home theaters where space is limited.

Despite its small footprint, the Dominion d108 is engineered to reproduce demanding bass passages with precision and dynamic impact. Its studio-grade analog signal processing, flexible input options and adjustable crossover make it easy to integrate with bookshelf speakers, floorstanding loudspeakers and compatible home theater processors.

Finished in high-gloss black with a removable fabric grille, the d108 provides substantial low-frequency performance without dominating the listening space.

Advanced 8-Inch Long-Excursion Driver

The Dominion d108 features a purpose-built 8-inch woofer engineered to produce substantial bass output from a compact enclosure.

JL Audio's Dynamic Motor Analysis technology optimizes the driver's motor system to maintain controlled cone movement throughout its excursion range. The driver also incorporates a carefully engineered lead-wire system designed to minimize mechanical noise during demanding low-frequency passages.

With 32.18 square inches of effective piston area and 80 cubic inches of effective displacement, the d108 delivers considerable bass capability for its size.

Its sealed enclosure supports controlled transient response, making it suitable for reproducing acoustic bass instruments, electronic music and cinematic low-frequency effects.

500-Watt Class D Amplifier

The Dominion d108's integrated Class D amplifier delivers 500 watts RMS of short-term power, providing the drive required for its long-excursion woofer.

The combination of amplifier power, advanced driver design and sealed cabinet construction produces an anechoic frequency response of 31–112Hz (±1.5dB), with low-frequency extension reaching 21Hz at −10dB.

This allows the d108 to add weight and depth to compact stereo systems while delivering convincing low-frequency effects in smaller home theaters and media rooms.

Studio-Grade Analog Signal Processing

The Dominion d108 incorporates an adjustable analog low-pass crossover that allows its output to be matched to the main loudspeakers.

Its 24dB-per-octave Linkwitz-Riley filter operates from 25Hz to 130Hz and can be defeated when crossover management is handled by an external AV processor.

Variable phase adjustment from 0° to 280°, switchable polarity and a continuously adjustable level control provide additional flexibility during installation.

These controls help the d108 integrate with a wide range of loudspeaker configurations, whether used in a dedicated two-channel system or a multichannel home theater.

Flexible Connectivity for Stereo and Home Theater

The d108 offers both stereo RCA and speaker-level inputs, accommodating a wide range of compatible audio equipment.

Its line-level inputs connect to stereo preamplifiers, integrated amplifiers with suitable outputs and home theater processors. High-level inputs allow the subwoofer to receive a signal from compatible amplifier speaker outputs, providing an installation option for stereo systems without dedicated subwoofer outputs.

Selectable input grounding helps address ground-related noise, while automatic signal-sensing power operation allows the subwoofer to activate when an audio signal is detected.

The Dominion d108 also supports JL Audio's optional JLINK wireless audio system, providing additional placement flexibility when running a signal cable is impractical.

Compact Sealed Cabinet

Measuring just 11.37 inches tall, 10 inches wide and 13.23 inches deep, the Dominion d108 fits into spaces that cannot accommodate a conventional large subwoofer.

Its rigid MDF enclosure incorporates internal bracing designed to manage the mechanical demands of the long-excursion driver. The high-gloss black finish and removable fabric grille allow it to integrate into premium living rooms, listening spaces and discreet home theater installations.

Manufactured in the United States using domestic and imported components, the Dominion series combines JL Audio's driver engineering with practical installation flexibility.

Experience JL Audio at The Grid HiFi

Discover the JL Audio Dominion d108 at The Grid HiFi in Houston, Texas. Our team designs and installs high-performance stereo systems, premium media rooms and dedicated home theaters, helping clients select subwoofers that complement their loudspeakers, room dimensions and listening preferences.

Whether you're adding deep bass to a compact two-channel system or integrating multiple subwoofers into a custom home theater, The Grid HiFi can assist with equipment selection, placement and professional system integration.

Technical Specifications