Description of the Polk Audio Signature Elite ES20 High-Resolution Bookshelf Loudspeakers:

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POWERFUL & IMMERSIVE HI-RES AUDIO FOR MOVIES, TV, MUSIC & GAMES

Enjoy movies, music and gaming with high-resolution, full-range hi-fi and cinematic sound. Polk’s high-performance ES20 bookshelf loudspeaker features a Dynamic Balance acoustic array, precision crossovers and Power Port bass-enhancing technology. Hi-Res Audio Certified and accessibly priced, Signature Elite ES20 fulfils the Polk promise of great sound for all.

HEAR MORE DETAIL IN MUSIC AND MOVIES YOU LOVE

ES20’s Hi-Res Audio Certified, Terylene dome tweeter provides crystalline highs (40kHz+) ideal for enjoying high-resolution music from services like Apple Music, Tidal, Amazon Music HD, Qobuz and Spotify HiFi, along with the soundtracks of the latest ultra-HD movies.

EFFORTLESS BASS

Power Port is a Polk-patented design that smoothly transitions the airflow from the speaker’s port into the listening area to eliminate turbulence and distortion for louder, deeper, more musical bass and a more open and transparent midrange. When paired with the ES20’s beefy 6.5” woofers, that means effortless bass you can feel.

MAKE YOUR ENTIRE LISTENING ROOM THE SWEET SPOT

You’ll experience a seamless, lifelike soundstage no matter where you’re seated thanks to Signature Elite ES20’s Dynamically Balanced acoustic array with phase-optimized, precision crossovers.

FROM VINTAGE HI-FI TO DOLBY ATMOS & DTS:X

ES20 delivers spacious, clear, enveloping and realistic sound reproduction from nearly any amplifier or receiver—whether 4- or 8-ohm, vintage audiophile or the latest Dolby Atmos or DTS:X surround sound AVRs.

Description of the WiiM CI MOD A80 — Custom Install Amplifier Module

The WiiM CI MOD A80 is a high-performance custom install amplifier module designed for seamless integration into multi-room audio systems. Delivering 80W per channel into 4Ω, it combines audiophile-grade power with the flexibility and reliability demanded by professional CI installers. Compact, efficient, and built to WiiM's exacting standards, the CI MOD A80 slots directly into compatible WiiM CI enclosures for a clean, rack-ready installation.

Whether you're powering in-ceiling speakers in a bedroom, a home theatre surround zone, or a distributed audio backbone, the CI MOD A80 delivers consistent, low-distortion performance across every listening environment.

Key Features

• 80W per channel into 4Ω — ample headroom for demanding speaker loads
• Class D amplification for cool, efficient operation in enclosed CI spaces
• Designed for WiiM CI modular enclosure ecosystem
• Low THD+N for clean, accurate audio reproduction
• Wide frequency response for full-range speaker compatibility
• Compact module form factor — minimal footprint, maximum output
• Ideal for multi-room, whole-home, and custom install audio projects

Specifications

Specification Value
Model CI MOD A80
Amplifier Class Class D
Output Power (4Ω) 80W per channel
Output Power (8Ω) 40W per channel
Channels 2 (Stereo)
THD+N <0.05% (1W, 1kHz)
Frequency Response 20Hz – 20kHz (±0.5dB)
Signal-to-Noise Ratio >100dB (A-weighted)
Input Impedance 10kΩ
Speaker Impedance 4Ω – 8Ω
Form Factor CI Modular Module
Compatible Enclosure WiiM CI Modular Enclosure
Power Supply Via WiiM CI Enclosure (external PSU)
Operating Temperature 0°C – 40°C
Brand WiiM

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