Monoprice
Monoprice 138546 Monolith THX-465T: Dolby Atmos Tower Speaker
THX Certified Ultra tower speaker with built-in Dolby Atmos up-firing driver for immersive home theater audio.
$1,249.99*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.
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Overview
Key Features
Delivers the highest level of accuracy and reproduce all the dynamics and detail of the best home theater soundtracks and music.
Each speaker has been THX, ensuring optimal frequency response, dispersion, and low distortion.
THX ensures that the sound from the speaker is as the audio engineer intended.
Up firing, Atmos enabled driver, to take advantage of today's modern film soundtracks.
Premium drivers, THX a sophisticated crossover network, and an HDF cabinet ensure that you've never experience home theater sound this dynamic, detailed, or immersive.
Specifications
Model
138546
Speaker Type
Floor-Standing Tower (Woofer)
Woofer Size
6.5 Inches
Certification
THX Certified Ultra
Special Features
Dolby Atmos Up-Firing Driver, Bass Boost
Surround Configuration
2.0
Recommended Use
Music, Home Theater
Compatible Devices
Desktop, Television, Projector, Laptop
Power Source
Corded Electric (Passive)
Dimensions
16"D x 19"W x 57.5"H
Weight
82 Pounds
Color
Black
Included Components
Tower Speaker
Pros & Cons
👍 Pros
- THX Certified Ultra designation guarantees reference-level audio accuracy and dynamic range for large rooms.
- Integrated up-firing Dolby Atmos driver adds height channels without ceiling-mounted speakers.
- Premium driver array and sophisticated crossover network deliver detailed, full-range sound across music and movie content.
- Massive 82-pound build provides a rigid, resonance-resistant cabinet for cleaner bass reproduction.
- Versatile enough for both dedicated home theater and high-fidelity music listening.
👎 Cons
- At 82 pounds and 57.5 inches tall, it demands significant floor space and is difficult to move once positioned.
- Requires a capable amplifier or AV receiver — the speaker's performance ceiling depends on the quality of upstream electronics.
- Sold as individual speakers, so building a full surround setup requires purchasing multiple units at a considerable total cost.
- The large cabinet size may be visually imposing in smaller living rooms or media spaces.
- No built-in amplification or wireless connectivity — strictly a passive, wired design.
Frequently Asked Questions
What does THX Certified Ultra mean for this speaker?
THX Certified Ultra is a rigorous certification ensuring the speaker meets strict standards for frequency response, dispersion, dynamic range, and low distortion, qualifying it for large home theater rooms up to 3,000 cubic feet.
Does the Monolith THX-465T have a built-in Atmos driver?
Yes, it includes an up-firing, Dolby Atmos-enabled driver on top of the cabinet, allowing it to bounce height-channel audio off the ceiling without requiring separate overhead speakers.
How much does this tower speaker weigh?
It weighs 82 pounds, so it is a substantial floor-standing unit that benefits from being placed on a stable, level surface.
Does this speaker require an external amplifier or receiver?
Yes, the THX-465T is a passive speaker that requires a separate amplifier or AV receiver to power it. It connects via standard speaker wire.
What size are the woofer drivers in this speaker?
The speaker uses 6.5-inch woofer drivers.
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