Klipsch Flexus Core 300 + surr 100 (pack of 2) + sub 100
Specifications and features
Overview
This complete system combines the soundbar Flexus Core 300 with 5.1.2 channels, two rear speakers Surr 100 and the subwoofer Sub 100. It is the world’s first soundbar to integrate Dirac Live room correction technology, the result of a collaboration between Klipsch and Onkyo that brings together American acoustic expertise and Japanese electronic precision. Developed over more than three years and validated by over 1000 tests, this modular bundle delivers a genuine 5.1.2 configuration with dedicated drivers for each channel.
A soundbar that redefines the category
The Flexus Core 300 is 137 cm wide and only 7.8 cm high, yet houses thirteen distinct transducers. Four 5.7 cm paper-cone front drivers handle the front mids and lows, while a 1.9 cm horn-loaded tweeter, a Klipsch signature since 1946, ensures crystal-clear dialogue in the center channel. Two 5.7 cm side drivers create a wider stereo image, and four integrated 10.2 cm woofers deliver substantial bass even without an external subwoofer.
For Dolby Atmos height effects, two upward-firing 10.2 cm woofers work together with two 5.7 cm full-range upward-firing drivers. This 5.1.2 configuration generates a three-dimensional sound field by bouncing sound off the ceiling, creating the illusion of speakers suspended above the listening area. The soundbar reaches a maximum sound pressure level of 106 dB and covers a frequency range from 43 Hz to 20 kHz.
The use of paper cones is no coincidence. This material, favored by Klipsch acousticians since the brand’s inception, offers an excellent stiffness-to-mass ratio and internal damping that limits unwanted resonances. The horn-loaded tweeter carries on a technology developed by Paul Wilbur Klipsch back in the 1940s: the acoustic horn controls the directivity of the sound, focusing energy toward the listener and reducing unwanted reflections off the side walls.
Dirac Live: room correction from the professional world
The Flexus Core 300 integrates Dirac Live, a room correction system founded in Sweden in 2001. Unlike standard automatic calibrations that merely adjust volume levels, Dirac Live analyzes both the frequency response and the impulse response of the system in the room. A supplied measurement microphone captures test signals emitted by each speaker, then the software calculates digital filters that compensate for acoustic flaws related to room geometry, furnishings, and materials.
The included Dirac Live Limited Bandwidth version corrects the spectrum up to 500 Hz, the range where most home acoustic problems are concentrated: room resonances, cancellations caused by standing waves, and phase shifts between transducers. An optional upgrade to the Full Bandwidth version extends this correction across the entire audible range up to 20 kHz, further refining the temporal coherence of transients and the precision of the soundstage.
Calibration can be performed via the Klipsch Connect Plus smartphone app or, for more advanced control, using the Dirac Live software on a computer. This second method lets you customize the target curve — that is, the desired sonic signature after correction — and adjust parameters by speaker group. You can thus define distinct frequency ranges for the soundbar’s internal drivers, the rear speakers, and the subwoofer.
Flexus Surr 100 rear speakers
The two Surr 100 speakers are compact, standing 17.1 cm tall, and each uses a 7.6 cm paper-cone full-range driver. Their sealed design avoids the complications of tuned ports and ensures fast transient response, at the cost of bass extension limited to 235 Hz. They reach a maximum sound pressure level of 103.5 dB and handle 50 watts continuous RMS power.
These speakers operate exclusively with Flexus soundbars via Klipsch Transport technology, a proprietary 2.4 GHz wireless link. A USB transmitter plugs into the soundbar and automatically syncs with the receivers built into the speakers. Each Surr 100 plugs directly into a mains outlet using its integrated power supply and 2-meter right-angle power cord. No cable links the speakers to each other or to the soundbar, greatly simplifying installation and allowing flexible placement.
Klipsch Transport technology was developed specifically for this range to ensure low latency and precise synchronization between all system components. Klipsch and Onkyo engineers carried out more than 1000 tests to validate the reliability of this wireless connectivity — essential to the coherence of a multichannel system, where even slight timing errors degrade spatial localization.
Flexus Sub 100 subwoofer
This sealed 33.5 cm cube subwoofer uses a 25.4 cm (10 inch) long-throw paper-cone woofer. The Class D amplifier delivers 80 watts RMS, with peaks up to 160 watts. Frequency response extends from 26 Hz to 250 Hz with a tolerance of ±3 dB, and the maximum sound pressure level reaches 103.7 dB at one meter.
The sealed design sacrifices efficiency in favor of speed and transient accuracy. Ported subs can reach lower frequencies for a given enclosure volume, but their phase response deteriorates rapidly below the port tuning frequency, and the cone becomes progressively harder to control. A sealed sub maintains consistent electrical and mechanical damping over its entire operating range, preserving bass texture definition and the punch of percussive impacts.
The Sub 100 connects wirelessly to the soundbar using the same Klipsch Transport technology as the rear speakers. A supplied USB dongle plugs into the dedicated port on the soundbar, and synchronization is established automatically. An RCA/LFE line input offers an alternative wired connection if the RF environment is problematic. Two right-angle 2-meter mains power cords are supplied, varying by region.
Connectivity, streaming, and control
The Flexus Core 300 soundbar offers an HDMI 2.1 input with eARC audio return, an HDMI 2.1 output for 8K video passthrough, a digital optical input, and a USB-C input. An RCA subwoofer output accepts an additional wired subwoofer. The USB-A port is used for firmware updates and MP3 file playback. An infrared port relays commands from a universal remote.
For wireless streaming, the system supports Apple AirPlay, Google Cast, Spotify Connect, Tidal Connect, QPlay, and Bluetooth. The Klipsch Connect Plus app for iOS and Android centralizes source selection, EQ presets, Night mode (which compresses dynamic range), Dialogue mode (which boosts vocal frequencies), and software updates. The app also handles Dirac Live Express calibration, which is sufficient for most setups.
The supplied remote is backlit and communicates via Bluetooth Low Energy, avoiding the line-of-sight issues of traditional infrared. It offers shortcuts to various sound modes and quick volume adjustments.
Build and finish
The soundbar enclosure combines plastic and metal, with a vinyl-textured top panel that mimics wood grain. The side and front grilles are covered with stretched fabric, while metal grilles protect the upward-firing drivers. The vertical edges are rounded to soften the lines. The front LED display indicates the active source and volume level.
The Surr 100 speakers and Sub 100 subwoofer share an ebony vinyl finish that blends with most contemporary furnishings. The Surr 100s come with wall mounts for elevated installation when furniture does not allow ideal placement.
The soundbar’s 8.5 kg weight and the subwoofer’s 9.4 kg weight reflect substantial construction with panels dense enough to limit unwanted vibrations. The rear speakers weigh only 1.13 kg each, making wall mounting easy.
What the press says
The Klipsch Flexus Core 200 soundbar is excellent for TV shows and dialogue-rich media. Its stereo frequency response provides a good amount of bass for a standalone bar, adding punch to action-packed series. Its discrete center channel delivers naturally sounding dialogue thanks to a well-balanced midrange.
Automatically translated — Show original (French)
The Klipsch Flexus Core 300 is ideal for mixed use. It supports all audio formats (Dolby Atmos, DTS:X, Dolby Digital Plus, etc.), with HDMI 2.1-compatible video passthrough. This lets you watch most media without downmixing and use it as an entertainment platform.
Automatically translated — Show original (French)
Soundbar: Klipsch Flexus Core 300
Audio system
- Configuration: 5.1.2 soundbar with Dolby Atmos
- Maximum sound output: 106 dB
- Frequency response: 43 Hz – 20 kHz
- Speaker type: sealed enclosure (plastic and metal)
Speakers and transducers
- Front speakers: 4 × 5.7 cm, 1 × 1.9 cm horn-loaded tweeter
- Upward-firing speakers: 2 × 10.2 cm woofers, 2 × 5.7 cm full-range drivers
- Side speakers: 2 × 5.7 cm
Audio processing technologies
- Dirac Live: room acoustic correction via mobile app
- Dolby Atmos: precise three-dimensional rendering with vertical and lateral channels
- DTS:X: native decoding for full immersion
- Klipsch and Onkyo technology: US / Japan acoustic alliance for exceptional precision
Connectivity
- Inputs: HDMI eARC, HDMI 2.1 passthrough, USB-C, optical, Bluetooth
- Outputs: HDMI Out, subwoofer output (RCA)
- USB port: 1 × USB-A (system updates, MP3 playback)
Network streaming
- Supported protocols: AirPlay, Google Cast, Spotify Connect, Tidal Connect, QPlay, Bluetooth
Control
- Klipsch Connect Plus app: audio settings, multi-device management, firmware updates
- Included remote control: backlit, BLE (Bluetooth Low Energy)
Dimensions and weight
- Width: 137.2 cm
- Height: 7.8 cm
- Depth: 12.6 cm
- Weight: 8.5 kg
Klipsch Flexus Surr 100 rear speakers (set of 2)
Acoustic system
- Speaker type: sealed (plastic, metal)
- Full-range driver: 7.6 cm paper cone
- Finish: ebony black vinyl
Audio performance
- Maximum sound pressure level: 103.5 dB at 1 m
- Rated power: 50 W continuous (RMS)
- Frequency range: 235 Hz - 20 kHz
Physical specifications
- Dimensions (H × W × D): 17.1 × 10.5 × 10.95 cm
- Unit weight: 1.13 kg
- Power supply: 100-240 V / 50-60 Hz, built-in power supply
Included accessories
- 2 angled 2.0 m mains power cords (depending on region)
- 1 Flexus wireless transmitter
- 1 user manual
Klipsch Flexus Sub 100 subwoofer
Components
- 25.4 cm long-throw paper cone driver
- Amplification: class D
Performance
- Power: 80 W continuous, 160 W peak
- Frequency response: 26 Hz - 250 Hz ± 3 dB
- Maximum sound pressure level: 103.7 dB
Construction
- Material: medium-density fiberboard (MDF)
- Type: sealed subwoofer
Connectivity
- Inputs
- RCA / LFE line
- Flexus Transport 2.4 GHz wireless
Dimensions and weight
- Height: 340 mm
- Width: 335 mm
- Depth: 349 mm
- Weight: 9.4 kg
Finish and accessories
- Finish: ebony vinyl
- Included accessories
- 2 angled 2.0 m mains power cords (depending on region)
- 1 wireless dongle with Klipsch Transport technology
- 1 user manual
Frequently Asked Questions
Can the Flexus Core 300 be used with rear speakers or a subwoofer from another brand?
Flexus Surr 100 speakers operate exclusively with Flexus soundbars via proprietary Klipsch Transport technology. However, the RCA subwoofer output accepts any active subwoofer equipped with a line or LFE input. This wired connection does not benefit from wireless transmission, but Dirac Live can still include this subwoofer in its calibration.
Does Dirac Live correction work for all listening positions?
Dirac calibration takes several measurements at different locations within the listening area to create an acoustic model of the space. The applied corrections are designed to improve response across this entire area, not just at a single point. That said, the central position remains where optimization is most pronounced. For a very wide area — for example, a four-seat sofa — there will be some variation depending on where you sit, but typically less than before correction.
Is room acoustic treatment necessary to achieve good results?
Dirac Live effectively corrects frequency response issues and phase misalignments, but cannot fully eliminate the effects of a highly reverberant room or a ceiling that is too low. A minimum of passive treatment — rugs, curtains, absorption panels at first reflection points — is still beneficial. Dirac optimizes what the speakers can correct electronically, while passive treatment addresses reflections that cannot be compensated with digital processing.
Does the system support control via a home automation setup?
The Flexus Core 300 supports IP control with major integration systems such as Control4 and Crestron. Basic commands — power on/off, volume, source selection — can be integrated into a home automation scenario. The Klipsch Connect Plus app also provides full control from a smartphone or tablet.
What is the difference between the Limited Bandwidth and Full Bandwidth versions of Dirac Live?
The included Limited Bandwidth version corrects up to 500 Hz, covering the range where room resonances, standing-wave cancellations, and most phase issues related to driver positioning occur. The Full Bandwidth version, available for 99 dollars, extends this correction across the entire audible spectrum up to 20 kHz, improving the temporal coherence of fast transients and the precision of stereo imaging. The differences are more audible on highly resolved content — classical music, acoustic jazz — than on compressed action soundtracks.
Are paper cones fragile or sensitive to humidity?
The paper cones used by Klipsch undergo treatments that make them resistant to the normal ambient humidity of a home. This material is not intended for outdoor use exposed to the elements, but performs reliably indoors. Paper offers highly desirable acoustic qualities: light weight, sufficient rigidity, and internal damping that limits cone resonances. Klipsch has used this material since 1946 with consistently positive feedback on durability.
Can the height speakers be disabled if the ceiling is too low or too absorbent?
The Klipsch Connect Plus app lets you adjust the relative level of the different speaker groups, but does not allow you to completely disable the height drivers. During Dirac Live calibration, the system measures how effectively sound reflects off the ceiling and adjusts its correction accordingly. If the ceiling strongly absorbs sound — acoustic ceiling tiles, wood paneling — or if it is higher than 3.5 meters, height effects will naturally be reduced, and Dirac will take this into account during calibration.
Does the system support playback of high-resolution files?
AirPlay, Google Cast, Spotify Connect, and Tidal Connect stream audio over Wi‑Fi and support streams up to 24-bit/48 kHz depending on the service. The HDMI eARC input carries lossless Dolby TrueHD and DTS-HD Master Audio formats from a Blu-ray player or game console. The USB-A port plays MP3 files from a USB drive, but does not support lossless formats such as FLAC or ALAC. For these formats, you must use a network source compatible with one of the built-in streaming protocols.
- Eco-contribution included in the sale price.
