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Polk Audio® Black 4.5" All Weather Outdoor Loudspeaker
Polk Audio® Black 4.5" All Weather Outdoor Loudspeaker 0
Polk Audio® Black 4.5" All Weather Outdoor Loudspeaker 1
Polk Audio® Black 4.5" All Weather Outdoor Loudspeaker 2

Polk Audio® Black 4.5" All Weather Outdoor Loudspeaker

Model #: Atrium4-BLACK
Polk Audio
At a Glance
The Compact Atrium4 loudspeaker produces high fidelity sound quality anywhere you want great sound. It's small size makes it ideal for tight, out-of-way installations.
$199.00Save $30.00

Get to know this product.

  • All Weather certified
  • Speed-Lock mounting system

Speed Lock Mounting System

Simply mount the bracket and click the speaker into place. Aim it and tighten it down.

Patented Dynamic Balance®

The perfect material performance, eliminating driver and tweeter "artifacts" for more realistic sound reproduction at high and low volume levels.

Useful Documents


Connector Type:Gold-Plated Pair of 5-way Binding Posts


Tweeter Composition:Aluminum
Woofer Composition:Polymer-Cone
Driver Component Size:4.5"




Sold As:Pair


Sensitivity:89 dB
Speaker Type:Outdoor Loudspeaker
Frequency Response:75 Hz - 25 Hz




Total Pieces1


Cabinet Warranty5 years
Drivers Warranty5 years
Original Purchaser OnlyYes

Shipping Cartons

Carton 19.5 lbs (4.31 kg)

On-Wall, Bookshelf and Soundbars

Quantity IncludedPair
AvailabilityUS; Internationally
OrientationHorizontal; Vertical
Height8.625" (21.91 cm)
Width5.688" (14.45 cm)
Depth6.688" (16.99 cm)
Weight3.6 lbs (1.63 kg)
Front Array Driver Complement(1) 4.5" (11.43 cm) d (Round) Mid/Woofer - Tweeter; (1) 0.75" (1.91 cm) d (Round) Tweeter - Tweeter

Audio Quality

Total Frequency Response75 Hz → 25 Hz
Nominal Impedance8 ohms
Sensitivity (1 watt @ 1 meter)89 dB

Swivel Wall/Ceiling Mount Mount

Mounting Type180° Speed-Lock mounting system
Available OrientationsHorizontal; Vertical

External Amplifier

Recommended Amplifier Power Per Channel10 watts → 80 watts


Speaker Inputs(2) Pair of 5-way Binding Posts - Gold-Plated

Misc. Specs

Product Weight (lbs.)3.6
Frequency Response75Hz - 25kHz
Enclosure MaterialPolypropylene
Color Finish NameBlack
Outdoor ApprovedYes
Manufacturer Warranty5 Year Parts & Labor
Bi Amp InputsNo
Input Power Range10-80 Watts
Speaker Connector Type5-Way (Universal) Binding Posts
Mounting Hardware IncludedYes
RMS Power Handling (Watts)80
Enclosure TypeBass Reflex
Impedance8 ohms
Maximum Power Handling (Watts)80
Depth (in.)6.68
Height (in.)8.63
Video ShieldedNo
Width (in.)5.69
Woofer Size4.5
WarningProposition 65 Warning for California Residents