Polk Audio Signa S4 vs Vizio P-Series Quantum X TV

The Polk Audio Signa S4 delivers immersive, cinematic sound to your living room through advanced Dolby Atmos technology and an included wireless subwoofer. Designed to seamlessly integrate with modern 4K and 8K TVs, it transforms everyday television viewing, movie nights, and music listening into a true surround sound experience. Featuring Polk's patented Voice Adjust technology, the sound bar ensures crystal-clear dialogue so you never miss a word. Setup is effortless with the included HDMI eARC and optical cables, allowing you to control the volume using your existing TV remote while enjoying robust, room-filling bass from the down-firing subwoofer.

The Vizio P-Series Quantum X delivers stunning 4K resolution with quantum dot technology, offering a peak brightness of up to 3,000 nits for vivid HDR experiences. Its native 120 Hz panel and low input lag make it ideal for both cinematic viewing and high‑frame‑rate gaming. Equipped with SmartCast, the TV provides built-in streaming apps, voice control, and seamless casting from mobile devices. Multiple HDMI 2.1 ports support variable refresh rate (VRR) and auto low latency mode (ALLM), ensuring smooth performance across consoles and PCs.

• Immersive Dolby Atmos height effects
• Included wireless subwoofer for deep bass
• Voice Adjust technology for clear dialogue
• Simple setup with HDMI eARC and optical cables

• Exceptional peak brightness for HDR
• 120 Hz native refresh rate
• Multiple HDMI 2.1 ports
• Robust SmartCast ecosystem

• Lacks built-in smart assistant integration
• No Wi-Fi streaming support built-in
• Limited physical audio inputs beyond HDMI and optical

• Limited local dimming zones compared to OLED
• No built‑in OLED panel for perfect blacks
• SmartCast UI can feel less polished than competing platforms