Klipsch Flexus Core 300 vs Marshall Heston 120

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Flexus Core 300 compared with Heston 120

	KlipschFlexus Core 300	MarshallHeston 120
Overview
Released
Released	2025	2025
Sound
Type
Type	Soundbar	Soundbar
Channels
Channels	5.1.2	5.1.2
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.	Two 2 × 5-inch bass drivers, two 3-inch mid-woofers, two 0.8-inch tweeters and five 2-inch full-range drivers; four passive radiators
Amplifiers
Amplifiers	Powered by Onkyo	Eleven Class D amplifiers, listed as 2 × 50 W and 9 × 30 W; separately stated total output 150 W peak. These are different maker ratings, not an additive system power claim.
Frequency response
Frequency response	43 Hz–20 kHz; maximum acoustic output 106 dB (maker)	40 Hz–20 kHz; maximum SPL 95 dB
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	Dolby Atmos and DTS:X
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.	Automatic calibration; Movie, Music, Night and Voice modes
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	None
Wi-Fi
Wi-Fi	Wi-Fi and Ethernet network connection	Wi-Fi 6
Bluetooth
Bluetooth	–	Bluetooth 5.3, SBC, AAC and LC3; Auracast supported
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, HDMI input with maker-stated 4K 120 Hz and Dolby Vision passthrough, stereo RCA input, mono RCA subwoofer output, USB-C and Ethernet; no optical input despite an erroneous Expert Reviews connection list
Streaming
Streaming	Apple AirPlay 2; Google Cast; Spotify Connect; TIDAL Connect; QPlay; Bluetooth	AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect and airable radio
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	Optional Heston Sub 200 sold separately; AirPlay grouping through Apple Home
App
App	Klipsch Connect Plus for iOS and Android; EQ, channel levels, room correction, streaming set-up and firmware updates	Marshall app
Design
Weight
Weight	8.5 kg	7.04 kg (better)
Controls
Controls	Top power, source and volume controls; supplied BLE backlit remote; dimmable alphanumeric display. No built-in voice assistant (TechRadar).	Rotary controls and preset buttons; TV remote through HDMI CEC. No separate remote supplied.
Microphones
Microphones	Supplied external measurement microphone for room correction	Two calibration microphones; no built-in voice assistant
Mounting
Mounting	1/4 in × 20 threaded insert; optional slim-depth wall bracket sold separately	Optional Heston 120 wall mount
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.	1100 × 76 × 145 mm (width × height × depth)
Colours
Colours	Black with ebony vinyl finish; Walnut option	Black
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	Soundbar, mains lead, HDMI cable and guides