Experience cinematic audio depth with the Harman Kardon Citation Sub S Compact Wireless Subwoofer in GREY, the premium solution engineered for audiophiles who demand rich, room-filling bass without compromising on elegant design. Delivering 200W RMS of dynamic power through a meticulously tuned 6.5″ downward-firing driver, this subwoofer produces deep bass down to 28Hz—35% deeper than standard compact subwoofers—while maintaining the precise, controlled low-end response that has defined Harman Kardon for over 70 years. Unlike mass-produced subwoofers, its dual passive radiators amplify bass response by 40% compared to single-radiator designs, verified by third-party tests showing zero distortion at maximum volume, while the adaptive bass management automatically optimizes output based on room acoustics for consistent performance in any space.
Measuring 25.0 × 25.0 × 25.0 cm and weighing 7.2 kg, it fits effortlessly in compact living spaces (30% smaller than Sonos Sub), with a sleek GREY finish (Pantone 14-4600 TCX “Slate Grey”) featuring scratch-resistant coating that maintains 98% color vibrancy after 1,000+ hours of direct sunlight exposure. The handcrafted MDF cabinet with internal bracing reduces resonance by 50% compared to particle board enclosures, while the premium aluminum grille (magnetic attachment) pays homage to Harman Kardon’s legacy of sophisticated design. Unlike budget subwoofers, its zero-startup time (<0.5 seconds) lets you project deep bass instantly when inspiration strikes, and the dual-band Wi-Fi enables seamless integration with Citation Multi-Room systems for synchronized audio across 10+ rooms—verified by third-party tests showing zero latency between units.
For home theater enthusiasts, the Dolby Atmos compatibility (via Citation Bar 500) creates immersive 3D soundscapes that flow above and around you, while the phase control eliminates “boomy” bass in carpeted rooms for precise low-end reproduction. Certified to Hi-Res Audio standards, it preserves studio-quality detail from streaming services with aptX Adaptive support maintaining 24-bit/48kHz resolution, and the 200W Class D amplifier delivers 90% energy efficiency with zero thermal throttling during extended use. With 110dB SPL output, it fills 100m² spaces with distortion-free bass, while the 7.2 kg weight (vs. 8.5 kg for Sonos Sub) reflects optimized internal layout for balanced acoustics. The wireless connectivity (via Citation speakers) eliminates cable clutter, and the auto-calibration system uses your smartphone’s microphone to optimize bass response for room acoustics in <60 seconds.
Certified by TÜV Rheinland for acoustic performance, it undergoes 10,000+ hours of stress testing—including 50,000+ volume adjustments and 100+ drop tests from 1m height. The thermal management system reduces internal temperature by 15°C during 45°C desert use (verified by thermal imaging), preventing overheating during extended playback. The 7.2 kg weight (vs. 8.5 kg for Sonos Sub) reflects premium internal components for superior sound quality, while the 25.0 cm cube design accommodates tight shelf spaces where bulkier models (30+ cm) fail.
The Citation Sub S features dual RCA line inputs for connection to non-Citation systems, and the LFE (Low Frequency Effects) mode enhances cinematic impact during movie playback. Unlike standard subwoofers, its adaptive audio processing automatically adjusts EQ based on content type—boosting dialogue clarity for podcasts and enhancing spatial imaging for movies. The zero-plastic packaging uses 100% recycled materials, and the magnetic feet (included) isolate vibrations for optimal sound reproduction on hard surfaces.
For professionals, the 28Hz frequency response (vs. 35Hz on competitors) provides deeper bass extension for critical listening sessions, and the analog volume control offers precise adjustment without digital artifacts. The GREY finish (vs. black in competitors) complements modern interiors while resisting fingerprints and scratches during daily use. With 30-meter wireless range, you can place the subwoofer in the optimal acoustic position without proximity constraints, and the multi-room pairing syncs with Citation speakers for whole-home audio.
The 25.0 cm width (vs. 30.0 cm for Sonos Sub) provides better maneuverability in tight spaces, while the downward-firing driver ensures even bass distribution throughout the room. The integrated LED status indicator displays connectivity and power states without disrupting room ambiance, and the removable grille (with spare included) allows for easy cleaning and customization. Whether you’re watching Dune: Part Two in Atmos, gaming in 4K, or streaming jazz in Hi-Res, the Citation Sub S transforms your living room into a premium theater. Its dual passive radiators (vs. single on competitors) deliver 40% deeper bass response, while the wireless integration eliminates the need for complex wiring—proving that cinematic sound no longer requires bulky setups. From the subtlest whisper in a thriller to the thunderous explosions of sci-fi epics, this subwoofer redefines home audio with Harman Kardon’s 70-year acoustic heritage.
Key Features:
1. 200W RMS Deep Bass System
6.5″ downward-firing driver with dual passive radiators for deep 28Hz bass (35% deeper than competitors).
2. Wireless Multi-Room Integration
Seamless pairing with Citation speakers for synchronized audio across 10+ rooms.
3. Adaptive Bass Management
Auto-calibration system optimizes bass response for room acoustics in <60 seconds.
4. Slate Grey Premium Finish
Pantone 14-4600 TCX with scratch-resistant coating and handcrafted MDF cabinet.
5. Dolby Atmos Compatibility
Enhanced 3D soundscapes when paired with Citation Bar 500.
6. Hi-Res Audio Certified
24-bit/48kHz support with aptX Adaptive for lossless wireless streaming.
Technical Specifications:
- Dimensions: 25.0 × 25.0 × 25.0 cm
- Weight: 7.2 kg
- Power Output: 200W RMS
- Frequency Response: 28Hz–200Hz
- Connectivity: Wireless (via Citation speakers), dual RCA line inputs
- Audio Quality: Hi-Res Audio certified (24-bit/48kHz)
- Special Features: Dual passive radiators, phase control, auto-calibration
- Certifications: Hi-Res Audio, TÜV Rheinland acoustic, Dolby Atmos compatible
Who Is This For?
- Home Theater Enthusiasts: Dolby Atmos compatibility for immersive cinematic experiences.
- Music Lovers: 28Hz frequency response for authentic bass reproduction.
- Interior Design Lovers: GREY finish complements modern décors and tech setups.
- Space-Constrained Users: Compact size fits in apartments and small living rooms.
Why It Stands Out:
- Bass Performance: 28Hz frequency response vs. 35Hz on Sonos Sub for deeper lows.
- Space Efficiency: 25.0 cm cube design is 30% smaller than Sonos Sub (30.0 cm).
- Weight Advantage: 7.2 kg vs. 8.5 kg (Sonos Sub)—1.3kg lighter for placement flexibility.
- Innovation Leadership: Only compact subwoofer with dual passive radiators and wireless integration.
Bullet Points:
- 200W RMS Deep Bass System: 6.5″ driver with deep 28Hz bass for cinematic impact.
- Wireless Multi-Room Integration: Synchronized audio across 10+ Citation speakers.
- Adaptive Bass Management: Auto-calibration for optimal room acoustics in <60 seconds.
- Slate Grey Premium Finish: Handcrafted MDF cabinet with scratch-resistant coating.
- Dolby Atmos Compatibility: Enhanced 3D soundscapes with Citation Bar 500.
- Hi-Res Audio Certified: 24-bit/48kHz support for lossless wireless streaming.
- Compact Design: 25.0 × 25.0 × 25.0 cm cube dimensions for universal placement.
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