Performance
Audio-video synchronization (lip sync)
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
3.0
Lip-sync performance is inconsistent across setups: one gaming test found minimal lag, while a customer using an optical multi-room feed measured a very noticeable delay.
Background noise
Yamaha True X Surround 90A
5.0
Mechanical noise is well controlled. Stress tests reported no obvious port chuffing, shakes, or rattles from the subwoofer even at demanding settings.
Klipsch Flexus Core 100No score yet
Omnidirectional sound
Yamaha True X Surround 90A
5.0
The best modes create an enveloping, 360-degree bubble that extends around and above the listener. Music and films can feel room-filling rather than locked to the bar.
Klipsch Flexus Core 100No score yet
Other features
Backwards compatibility
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
5.0
Older wired subwoofers can integrate successfully, including models that are many years old, giving the Core 100 useful backwards compatibility for existing audio gear.
Chromecast compatibility
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
1.4
Google Cast/Chromecast streaming is absent, limiting whole-home and app-based wireless playback for users invested in that ecosystem.
Dust resistance rating
Yamaha True X Surround 90A
5.0
IP67 dust protection strengthens the rear speakers’ case as true portable Bluetooth speakers. Their rugged rating is unusually useful for components that can leave the theater room.
Klipsch Flexus Core 100No score yet
Gaming HDMI passthrough
Yamaha True X Surround 90A
1.6
Gaming passthrough is a clear weakness. The HDMI input tops out at 4K/60 for modern use and omits VRR and 4K/120, so serious PS5 or Xbox Series X users are better off connecting consoles to the TV.
Klipsch Flexus Core 100No score yet
HDMI 2.1 gaming
Yamaha True X Surround 90A
1.6
The HDMI input is not a full HDMI 2.1 gaming solution: 4K/120 and VRR are missing. That limitation is repeatedly called disappointing or even a dealbreaker for current-generation console owners.
Klipsch Flexus Core 100No score yet
Lighting effects
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
1.0
The top controls do not illuminate during use, which one owner found disappointing for visibility.
Rear speaker cable length
Yamaha True X Surround 90A
2.0
The surrounds are wireless in operation, but the supplied USB charging cables are short. Using the charging pads behind a couch may require longer cables or nearby outlets.
Klipsch Flexus Core 100No score yet
Sustainability
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
5.0
Packaging choices earn praise for using cardboard instead of crumbly polystyrene, reducing unnecessary plastic while still protecting the product well.
Battery and charging
Battery life (if portable)
Yamaha True X Surround 90A
4.1
The rechargeable surrounds generally last well in real use, ranging from long single sessions to multiple days of intermittent listening. Charging docks reduce the risk of the rear channels dying mid-movie.
Klipsch Flexus Core 100No score yet
USB-C charging
Yamaha True X Surround 90A
2.5
USB-C charging is convenient in principle, but the included rear-speaker cables are short and some packages omit charging bricks. Buyers planning permanent charging-pad placement may need longer cables or their own adapters.
Klipsch Flexus Core 100No score yet
Controls and connectivity
Bluetooth connection stability
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
3.3
Bluetooth stability is polarized: several tests found reliable, effortless pairing, while multiple owners report repeated failures that require resets or eventually stop working altogether.
Bluetooth range
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
5.0
Bluetooth range performed reliably to about 30 feet in testing, giving the bar useful room-scale wireless reach.
Ownership and support
Customer support
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
1.5
Customer support draws mostly negative feedback when hardware or firmware problems arise. Owners describe hard-to-find contact information, repetitive troubleshooting, failed update files, and poor resolution after replacement problems.
Optical input support
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
3.0
Optical can work cleanly and even support TV-remote control in some setups, but one owner had a deeply frustrating optical-control and firmware experience. HDMI eARC is the safer path when available.
Power reliability
Yamaha True X Surround 90ANo score yet
Klipsch Flexus Core 100
1.0
One owner experienced the bar shutting itself off after only a few minutes and handing audio back to the TV, a serious power-behavior problem.
Comfort and build
Water resistance rating
Yamaha True X Surround 90A
5.0
The portable surrounds’ IP67 protection is a standout practical feature. It makes occasional outdoor or poolside use far less worrying than with typical soundbar surrounds.
Klipsch Flexus Core 100No score yet