Klipsch Flexus Core 300 vs Sonos Arc Ultra

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Flexus Core 300 compared with Arc Ultra

	KlipschFlexus Core 300	SonosArc Ultra
Overview
Released
Released	2025	October 2024
Sound
Type
Type	Soundbar	Soundbar
Channels
Channels	5.1.2	9.1.4
Dolby Atmos
Dolby Atmos	Yes	Yes
Drivers
Drivers	Four 2.25 in front drivers, one 0.75 in horn-loaded tweeter, four 4 in top woofers, two 2.25 in discrete up-firing drivers and two 2.25 in side drivers, from the current V08 specification table. Its introductory prose instead calls the side drivers 2.5 in.	Nine silk-dome tweeters (two firing upwards), six midwoofers and a Sound Motion woofer (four motors, dual membrane)
Amplifiers
Amplifiers	Powered by Onkyo	Fifteen class-D digital amplifiers
Frequency response
Frequency response	43 Hz–20 kHz; maximum acoustic output 106 dB (maker)	–
Audio formats
Audio formats	PCM; LPCM up to eight channels; Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos; DTS, DTS-HD and DTS:X	Stereo PCM, Dolby Digital, Dolby Digital Plus, Dolby Atmos (Dolby Digital Plus); with HDMI eARC also Dolby Atmos, Dolby TrueHD, Dolby Atmos (TrueHD), multichannel PCM and Dolby multichannel PCM; DTS Digital Surround
Room tuning
Room tuning	Dirac Live with supplied measurement microphone; the included licence covers below 500 Hz, with a paid full-range upgrade (SoundStage). Movie/Music modes; three-band EQ; dialogue and night modes.	Trueplay (iOS and Android); bass, treble and loudness adjustable; Speech Enhancement with four levels; Night Sound
Connections
Wi-Fi
Wi-Fi	Yes	Yes
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	Yes	Yes
HDMI eARC
HDMI eARC	Yes	Yes
Voice assistants
Voice assistants	None	Alexa and Sonos Voice Control
Wi-Fi
Wi-Fi	Wi-Fi and Ethernet network connection	Wi-Fi 6 (802.11a/b/g/n/ac/ax), 2.4 GHz and 5 GHz
Bluetooth
Bluetooth	–	Bluetooth 5.3
Ports
Ports	HDMI 2.1 passthrough input; HDMI eARC output; digital optical; USB-C service connection; USB-A Flexus transmitter connection; Ethernet; microphone input; RCA subwoofer output	HDMI eARC; optical through an adapter sold separately
Streaming
Streaming	Apple AirPlay 2; Google Cast; Spotify Connect; TIDAL Connect; QPlay; Bluetooth	Apple AirPlay 2
Multi-room
Multi-room	Optional Flexus Sub 100/Sub 200 and Surr 100/Surr 200; supports up to two wireless subwoofers and two surround speakers	Groups with other Sonos products over Wi-Fi; add a Sonos Sub (or two) and rear speakers; TV Audio Swap to Sonos Ace headphones
App
App	Klipsch Connect Plus for iOS and Android; EQ, channel levels, room correction, streaming set-up and firmware updates	Sonos app (iOS and Android); works with the TV remote
Design
Weight
Weight	8.5 kg	5.9 kg (better)
Controls
Controls	Top power, source and volume controls; supplied BLE backlit remote; dimmable alphanumeric display. No built-in voice assistant (TechRadar).	Capacitive touch controls (play, pause, skip, replay, volume, voice mute, grouping); Bluetooth button; microphone switch
Microphones
Microphones	Supplied external measurement microphone for room correction	Far-field microphone array with beamforming and multichannel echo cancellation; switch cuts power to the microphones
Mounting
Mounting	1/4 in × 20 threaded insert; optional slim-depth wall bracket sold separately	M5 × 0.8 mm thread, 6.5 mm deep; Arc Ultra Wall Mount sold separately
Size
Size	3 1/16 × 54 × 4 15/16 in (7.8 × 137.2 × 12.6 cm), H × W × D, from the current V08 sheet; sealed plastic and metal enclosure. TechRadar reports first retail availability in September 2025; the earlier winter launch target was preliminary.	75 × 1,178 × 110.6 mm (H × W × D)
Colours
Colours	Black with ebony vinyl finish; Walnut option	Black, White
In the box
In the box	Soundbar, BLE backlit remote, two AAA batteries, region-specific 2 m power cord, 1.5 m HDMI cable, measurement microphone and user manual	Arc Ultra, power cable (2 m), HDMI cable (1.5 m), documentation