Denon AVR-X1800H vs Polk Audio Signa S4

The Denon AVR‑X1800H delivers a full 7.2‑channel surround sound experience with support for the latest 8K video formats via HDMI 2.1. It combines high‑resolution video pass‑through with Dolby Atmos and DTS:X object‑based audio for immersive home‑theater performance. Built‑in HEOS lets you stream music from popular services, control playback from a smartphone, and create multi‑room audio zones, while Wi‑Fi, Bluetooth, and AirPlay 2 provide flexible wireless connectivity.

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.

• Future‑proof 8K HDMI support
• Full Dolby Atmos and DTS:X decoding
• Integrated HEOS for multi‑room streaming
• Voice assistant compatibility

• 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

• Only three of its six HDMI inputs carry 8K/60Hz and 4K/120Hz; the other three top out at 4K/60Hz
• Limited power output compared to higher‑end models
• Phono input is moving‑magnet only; a moving‑coil cartridge needs an external head amp or step‑up transformer

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