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KEF LS50 Wireless II Active Speakers (Titanium Grey) - As Traded
Condition: Used. Very good, minor scuff on one speaker driver and rear top only (See Photos)
Includes: All Original Packaging and Accessories
SN: LSW0204494M44L6G / LSW0204494M44R6G
Includes 3 month (90 day) warranty
Overview
LS50 Wireless II is more than a high-performance loudspeaker; it’s the perfect all-in-one speaker system. It reveals every detail of your favourite music, which you stream from any source thanks to wireless compatibility with AirPlay 2, Chromecast and more.
The award-winning LS50 Wireless II connects to Roon without the need of configuration, so you can enjoy bit-perfect high-fidelity sound with zero fuss.
LS50 Wireless II features the 12th Generation Uni-Q driver array featuring an industry first - Metamaterial Absorption Technology (MAT). This particular Uni-Q driver, whilst being inspired by that of the R Series, has been engineered with regards to the overall system design.
The active LS50 Wireless II incorporates all the technology described for the passive LS50 Meta, plus a few extras that either add to the presentation of the music - making it even more accurate - or add to the functionality. The electronics, mounted on the back, includes two channels of power amplification (one channel for each driver and each of higher power than the original LS50 Wireless) and the KEF Musical Integrity Engine (MIE). This is essentially custom Digital Signal Processing (DSP) that allows the acoustic engineer to do far more than is possible in any passive design. Each stereo pair comprises a Primary and a Secondary speaker. The former incorporates adjustments applicable to both speakers, such as bass extension, room acoustic compensation, source selection and placement/EQ. Bass may be extended to lower frequencies than is limited by the usual passive cabinet-size/sensitivity trade-off, the balance may be adjusted for speaker position and room acoustics and the all-pass delay inherent in passive crossovers may be eliminated. All adjustments are made using a smartphone app. This is available for both iOS and Android devices and is a free download either from the Apple App Store or the Google Play Store as appropriate.
Specification
Drive Units: Uni-Q Driver Array
LF: 130 mm (5.25 in.) aluminium cone
HF: 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption Technology
Frequency Range (-6dB) Measured at 85dB/1m: 40 Hz – 47 kHz
*Depends on EQ settings
Frequency Response (±3dB) Measured at 85dB/1m: 45 Hz – 28 kHz
*Depends on EQ settings
Amplifier Output Power (Per Speaker): LF: 280W, HF: 100W
Amplifier Class (Per Speaker): LF: Class D, HF: Class AB
Max SPL Measured at 1m: 108 dB
Wireless Streaming Features: AirPlay 2, Google Chromecast, ROON Ready, UPnP Compatible, Bluetooth 5.0, Plays with Audirvāna
Source Resolution: Network up to 384kHz/24bit, Optical up to 96kHz/24bit, Coaxial up to 192kHz/24bit, HDMI up to 192kHz/24bit
*Depends on source resolution
Interspeaker Connection: Wireless: all sources resampled to 96kHz/24bit PCM, Wired: all sources resampled to 192kHz/24bit PCM
Supported Format (All Inputs): MP3, M4A, AAC, FLAC, WAV, AIFF, ALAC, WMA, LPCM, Ogg Vorbis
Home Automation System: Elan, RTi, Crestron Home, Savant, Control4, URC
Supported Format (Network): MQA, DSF: DSD64, DSD128, DFF: DSD64
Dimensions (HWD per Speaker): 305 x 200 x 311 mm (12 x 7.9 x 12.2 in.)
Power Input: 100 – 240VAC 50/60Hz
Power Consumption: 200W (operating power),
This AUD2,900 ask on a used Kef LS50 Wireless II Active subwoofer sits at the low end of fair territory. Recent comparable AUD listings clock in with a median of AUD2,992, 25th percentile at AUD2,946, and 75th at AUD3,039—making this a slight under-market nudge without screaming bargain, especially given the unknown condition.
Buyers, verify the driver's excursion and port tuning first—KEF active subs can develop woofer suspension issues from overdriving, leading to muddled bass. Confirm it includes the original power cable, GRoND spikes if applicable, and remote; also probe the age and service history, as Class D amps degrade capacitors over 3-4 years. Test pairing with LS50 mains for seamless integration.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
KEF traces its roots to 1961, when British engineer Raymond Cooke founded the company in a modest Nissen hut on the grounds of the Kent Engineering and Foundry in Maidstone, England. A former BBC engineer and Wharfedale veteran, Cooke was driven by a passion for music and a commitment to technological innovation, aiming to reproduce sound as faithfully as the original performance. From its inception, KEF pioneered materials like foil-stiffened polystyrene diaphragms and Melinex tweeters in its debut K1 loudspeaker, setting a benchmark for engineering precision that propelled the brand to early acclaim.
KEF has long specialized in loudspeakers, establishing itself as a leader with iconic innovations such as the Uni-Q coaxial driver and computer-aided design techniques that revolutionized driver and enclosure development. While drive units supplied to other manufacturers fueled its growth, the brand's core output remains high-fidelity speakers across categories like floorstanders, bookshelves, and home theater systems, including early THX-approved setups. Active wireless models and reference-grade series extend its portfolio, though it eschews amplifiers, turntables, DACs, headphones, or cables.
Renowned for its science-driven heritage, KEF occupies a premium position in the hi-fi market, blending accessible high-end performance with cutting-edge technology. Collectors prize vintage BBC monitors and Bextrene-driver classics, while modern buyers seek its precise, natural soundstaging. Decades of awards affirm KEF's status as a respected innovator, appealing to discerning audiophiles who value engineering over hype.
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