Are these original speakers?

No, there were speakers long before these existed.

Does it need to be plugged in at all times?

These speakers require speaker wire to be connected to them when being listened to. There is no power cable to be plugged in.

Is this a single speaker or a pair of speakers?

Since this question was asked regarding the Atrium 8 version but Amazon shows it under both the 6 and 8 version, the Atrium 8 version is sold as a single speaker. The Atrium 6 version (and smaller) are sold as pairs.

What is the rms wattage per speaker? I cannot get a straight answer!

Polk claims they will handle up to 125 watts per channel, but with a sensitivity of 91dB 《8 ohm) these speakers get very loud quickly. I have an older Technics H class receiver (100 watts p/ch) & have never pushed over half volume on my pair. Note: I do enjoy cranking it up. With a freq. response of 45 - 27,000Hz, I found a sub wasn't needed. Placement, area & environment ( walls, height, corner availability) make a big difference when installing them correctly, but wattage shouldn't be a concern. These speakers are a great buy for the price.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Polk Audio Atrium 8SDI Speakers (Black)

Product ID: 375164760

Details

Audio Output Mode
Stereo
Brand
Polk Audio
Connectivity Technology
Bluetooth
Frequency Response
27000 Hz
Speaker Maximum Output Power
125 Watts

🌊Mil-Spec salt & corrosion proof

🔊125W max output power

⚙️Speed-lock one-handed install

Description

🎶 Elevate your outdoor vibe with sound that outlasts the elements!

EFFORTLESS INSTALLATION - Speed-lock mounting system means you’re set up in seconds, even in the trickiest spots.
DUAL TWEETER ARRAY FLEXIBILITY - Switch between single high-performance stereo or dual L/R setup for tailored soundscapes.
RUST FREE WEATHERPROOF ELEGANCE - Anodized aluminum and stainless hardware ensure your speakers stay sleek and functional season after season.
IMMERSIVE SOUND WITH DYNAMIC BALANCE - Patented tech delivers crystal-clear highs and rich mids, turning your backyard into a concert hall.
UNMATCHED DURABILITY FOR OUTDOOR LIFE - Built to military and industrial standards, these speakers laugh in the face of salt fog, UV rays, and heavy rain.

The Polk Audio Atrium 8SDI is a rugged, all-weather outdoor speaker engineered to military-grade standards for salt, UV, and corrosion resistance. Featuring a 6.5-inch dynamic driver, dual tweeter array with phase cap for smooth highs up to 20kHz, and 125W max output, it delivers premium stereo sound anywhere outdoors. Its innovative speed-lock mounting system enables quick, secure installation, while anodized aluminum and stainless steel hardware guarantee rust-free durability. Perfect for millennials who demand high-fidelity audio and effortless style in their outdoor living spaces.

Specifications

ASIN	B00378KMIC
Age Range Description	Adult
Antenna Location	Military,Outdoor
Audio Driver Size	6.5 Inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Best Sellers Rank	#1,678,127 in Electronics ( See Top 100 in Electronics ) #211 in Outdoor Speakers
Box Contents	Mounting Bracket
Brand Name	Polk Audio
Colour	Black
Compatible Devices	Laptop, Personal Computer, Smartphone
Compatible with Vehicle Type	Car
Connectivity Protocol	Bluetooth
Control Method	Voice
Controller Type	Wired electrical
Customer Package Type	Standard Packaging
Customer Reviews	4.5 4.5 out of 5 stars (451)
Frequency Response	27000 Hz
Global Trade Identification Number	00747192118891
Impedance Unit of Measure	8 Ohms
Is Waterproof	TRUE
Item Dimensions D x W x H	23.4D x 21.6W x 32.8H Centimeters
Item Weight Unit of Measure	4.4 kg
Manufacturer	Polk Audio
Maximum Range	10 metres
Model Name	ATRIUM8B
Model Number	AM8085-A
Mounting Type	Floor Standing
Network Connectivity Technology	Bluetooth
Number of Audio Channels	2.0
Number of Batteries	1 Lithium Ion batteries required.
Number of Items	1
Power Source	ac
Product Features	Radio
Series Number	8
Speaker Maximum Output Power	125 Watts
Speaker Size	6.5 Inches
Speaker Type	Outdoor
Subwoofer Connectivity Technology	Wired
Subwoofer Speaker Diameter Unit of Measure	6.5 Inches
Tweeter Driver Diameter	1 Inches
UPC	747192118891
Water Resistance Level	Water Resistant
Wireless Technology Type	Bluetooth
Woofer Driver Diameter	6.5 Inches

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