Polk Audio Atrium 8SDI Single Dual Input Outdoor Speaker

Polk Audio Atrium 8 SDI - Single/Dual Input Outdoor Speaker

Overview

The Polk Audio Atrium 8 SDI is a flagship outdoor loudspeaker designed for both home listeners and audio professionals seeking premium audio in all-weather conditions. Engineered in the USA and part of Polk's renowned Atrium Series, it offers flexibility for stereo or single‑speaker use with robust durability and high‑fidelity performance.

Key Benefits

• Powerful and clear sound with a 6.5″ Dynamic BalanceRegistered woofer and dual tweeter array for excellent midrange and stereo imaging.
• Patented PowerPortRegistered bass venting adds impactful bass with minimal turbulence.
• Selectable single or dual‑input configuration allowing one speaker to function as a stereo pair in mono mode--ideal for left/right use or a single stereo speaker.
• All‑Weather Certified with military‑grade resistance to UV, salt fog, immersion, and corrosion.
• Five‑year warranty on drivers and cabinet for long‑term reliability.

Design and Build Quality

The Atrium 8 SDI features a rugged mineral‑filled polypropylene enclosure with integrated bracing for reduced resonance and enhanced durability. It includes rust‑proof aluminium grilles and brackets, stainless‑steel and brass hardware, and gold‑plated 5‑way binding posts. The Speed‑Lock? mounting system supports one‑handed installation with 180 degrees rotation in both vertical and horizontal orientations. A paintable finish is offered in either weatherproof black or white.

Key Technologies and Features

• Dynamic BalanceRegistered Technology: Reduces distortion by eliminating resonances through precision tuning.
• Klippel Optimisation: Ensures optimal voice‑coil alignment and woofer motor structure for clean, accurate response even at high volumes.
• PowerPortRegistered Bass Venting: Increases bass output while lowering turbulence and distortion.
• Dual‑Tweeter Array: Two 1″ anodised aluminium dome tweeters deliver stereo imaging and smooth high frequencies.
• Selectable Single/Dual‑Input: Switch allows mono or stereo operation from one speaker using 2‑ or 4‑conductor wiring.

Specifications

Performance and User Experience

The Atrium 8 SDI produces spacious, clear sound with smooth highs and tight bass. It performs exceptionally even with modest amplifiers and offers broad coverage across patios and decks. Built for the outdoors, it withstands sun, rain, salt air, and frost. The Speed‑Lock? mounting makes installation easy and allows directional positioning.

Q&A Section

• Can I use one Atrium 8 SDI as a stereo speaker?
  Yes, in dual‑input mode using 4‑conductor wiring.
• What amplifier power is recommended?
  10 W to 125 W per channel into 8 Ω.
• Is it suitable for coastal locations?
  Yes, it exceeds standards for UV, salt fog, immersion, and corrosion resistance.
• Can I mount it vertically or horizontally?
  Yes, with full 180 degrees rotation using the included Speed‑Lock? bracket.
• Can I paint the speaker to match my exterior?
  Yes, the cabinet is paintable without compromising weather protection.