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The Definitive Technology Mythos Gem XL is a compact, high-definition satellite loudspeaker designed for use as front or surround speakers in home theater systems. It features two 4.5-inch long-throw mid/bass drivers angled in opposite directions to broaden midrange dispersion and a 1-inch ferrofluid-dampened pure aluminum dome tweeter for extended, smooth high frequencies. The speaker uses a sophisticated Linkwitz-Riley crossover network for seamless driver integration and is voice-matched with the complete Mythos Series. The enclosure is hand-polished gloss black aircraft-grade extruded aluminum with proprietary damping technologies for rigidity and resonance control. It can be wall-mounted using a keyhole slot or articulating brackets. The Mythos Gem XL delivers a wide, dynamic soundstage with pinpoint imaging and superb realism, suitable for audiophile-grade home theater performance when paired with a powered subwoofer like Definitive's SuperCube. Recommended amplifier power is 10 to 200 watts per channel, with a frequency response of 50 Hz to 30 kHz, nominal impedance of 8 ohms, and sensitivity of 89 dB. Dimensions are approximately 12.6" H x 5.5" W x 4.5" D, weighing about 7.25 lbs. A break-in period of 20-40 hours is suggested for optimal performance. The product includes a steel wall bracket and mounting template, and carries a 5-year warranty on drivers and cabinets.
Driver and acoustic performance characteristics
Driver configuration and enclosure design
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Components that show up alongside the Mythos Gem XL in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The ProMonitor 800 matches the Mythos Gem XL on sensitivity (89 dB), impedance (8Ω), high-frequency extension (30 kHz), and woofer (4.5").
The CLR-2002's sensitivity is 91 dB against the Mythos Gem XL's 89 dB and its woofer 5.25" against 4.5". Both share impedance (8Ω) and high-frequency extension (30 kHz).
The S36AW's sensitivity is 90 dB against the Mythos Gem XL's 89 dB, its low-frequency extension 60 Hz against 50 Hz, and its woofer 6" against 4.5". Both share impedance (8Ω).
The ProMonitor 1000's sensitivity is 91 dB against the Mythos Gem XL's 89 dB. Both share impedance (8Ω), high-frequency extension (30 kHz), and ways (2).
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