Introduction
Welcome to your new Polk Audio Atrium 8 SDI Outdoor Speaker. This manual provides essential information for proper installation, operation, and maintenance of your speaker. Designed for powerful bass and broad sound coverage, the Atrium 8 SDI is built to withstand extreme weather and temperature, ensuring high-quality audio in any outdoor environment.
Safety Information
- Always ensure the speaker is securely mounted to prevent accidental falls.
- Do not expose the speaker to extreme temperatures beyond its operational limits or attempt to submerge it in water. While weather-resistant, it is not fully waterproof.
- Disconnect power to the amplifier before making any connections or performing maintenance.
- Do not attempt to open or service the speaker enclosure. Refer all servicing to qualified personnel.
- Keep packaging materials away from children to prevent choking hazards.
Package Contents
- Polk Audio Atrium 8 SDI Outdoor Speaker (Single)
- Speed-Lock Mounting Bracket
- User Manual (this document)
Setup
1. Mounting Location
Choose a suitable location that provides optimal sound dispersion and secure mounting. The Atrium 8 SDI is all-weather certified, making it ideal for patios, poolsides, sunrooms, and other outdoor areas. Consider the listening area and potential obstructions when selecting a spot.
2. Mounting the Speaker
The innovative Speed-Lock Mounting System is designed for easy, anti-slip one-handed installation. The speaker can be mounted either vertically or horizontally to best suit your space and desired sound direction.
- Securely attach the swiveling C-bracket to your chosen surface (wall, ceiling, etc.) using appropriate hardware (not included).
- Adjust the angle of the bracket to direct sound towards your primary listening area.
- Align the speaker with the bracket and fasten it with a click. The system ensures a secure fit.

3. Wiring Connections
The Atrium 8 SDI features a unique patented single/dual input switch, allowing flexible configuration.
- Single Speaker Mode: If using only one Atrium 8 SDI speaker, set the input switch to 'Single'. Connect both the left and right channel outputs from your amplifier to the speaker's binding posts. Ensure correct polarity (positive to positive, negative to negative).
- L/R Pair Mode: If using two Atrium 8 SDI speakers as a stereo pair, set the input switch on each speaker to 'Dual'. Connect the left channel output from your amplifier to one speaker and the right channel output to the other. Ensure correct polarity for both speakers.

Operating
1. Powering On/Off
The Atrium 8 SDI is a passive speaker and does not have its own power switch. It receives power and audio signals directly from your connected amplifier. Ensure your amplifier is correctly connected and powered on to operate the speaker.
2. Sound Optimization
The speaker incorporates Power Port Technology to enhance bass performance and a broad coverage baffle design for immersive sound.
- Power Port Bass Venting: This patented design directs airflow downwards, adding 3dB of deep, extended bass output. Ensure the port is clear of obstructions for optimal performance.
- Broad Sound Coverage: The speaker's design is optimized to fill medium-to-large outdoor spaces with full-range sound. Experiment with the speaker's angle using the mounting bracket to achieve the best sound dispersion for your specific listening area.


Maintenance
1. Cleaning
To clean the speaker enclosure, use a soft, damp cloth. Avoid using harsh chemicals, abrasive cleaners, or solvents, as these can damage the finish or components.
2. Weather Resistance
The Atrium 8 SDI is all-weather certified, meaning it is designed for rugged durability and high environmental endurance. It can withstand extreme temperatures and heavy rain year after year. However, it is not designed for submersion in water. Periodically inspect the speaker for any debris accumulation, especially around the Power Port, and clear it to maintain optimal performance.

Troubleshooting
- No Sound:
- Check all wiring connections from the amplifier to the speaker. Ensure correct polarity (+ to + and - to -).
- Verify the amplifier is powered on and functioning correctly.
- Confirm the single/dual input switch on the speaker is set appropriately for your setup (Single for one speaker, Dual for a stereo pair).
- Distorted Sound:
- Reduce the amplifier volume.
- Check for loose wiring connections.
- Ensure the speaker is not overdriven by excessive power from the amplifier.
- Poor Bass Response:
- Verify the Power Port is clear of any obstructions.
- Check your amplifier's bass or tone control settings.
- Adjust speaker placement; placing speakers closer to walls or corners can sometimes enhance bass.
Specifications
| Feature | Description |
|---|---|
| Model Name | Atrium 8 |
| Speaker Type | Outdoor |
| Mounting Type | Outside Mount |
| Material | Aluminum, Polypropylene |
| Woofer Diameter | 6.5 Inches (Dual voice coil dynamic balance aerated polypropylene cone) |
| Tweeter | Two 1" Anodized aluminum dome tweeters |
| Speaker Maximum Output Power | 125 Watts (x 2) |
| Frequency Response | 45 Hz - 45 KHz |
| Connectivity Technology | Binding Posts (for speaker wire connection) |
| Audio Output Mode | Mono, Stereo (selectable via switch) |
| Recommended Uses | Music, Pool, Indoor, Outdoor |
| Surround Sound Channel Configuration | 2.0 |
| Color | Black |
| Included Components | Mounting bracket |
| Item Weight | 9.7 Pounds |
| Product Dimensions | 9.2 x 12.9 x 8.5 inches |
| Weather Resistance | All-weather certified (not submersible) |
Warranty
The Polk Audio Atrium 8 SDI Outdoor Speaker comes with a Limited Warranty. For detailed warranty terms, conditions, and registration information, please refer to the official Polk Audio website or contact their customer support directly. Keep your proof of purchase for warranty claims.
Support
For technical assistance, product information, or warranty inquiries, please visit the official Polk Audio website or contact their customer support.
- Official Website: www.polkaudio.com
- Support Page: www.polkaudio.com/support
Please have your product model (Atrium 8 SDI) and serial number ready when contacting support.





