Monoprice

Monoprice 142829 Monolith THX-465IW In-Wall Speaker

3.8 (2 reviews)

Achieve Immersive Home Theater Sound with THX Certified In-Wall SpeakerThe Monolith THX-465IW In-Wall Speaker brings dynamic and detailed home theater audio to your listening space. THX Certified Ultra ensures this 3-way speaker delivers optimal frequency response, wide dispersion, and low distor...

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*Price sourced from Amazon.com. Last updated:Jun 29, 2026.Price and availability are subject to change.

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Overview

Achieve Immersive Home Theater Sound with THX Certified In-Wall Speaker

The Monolith THX-465IW In-Wall Speaker brings dynamic and detailed home theater audio to your listening space. THX Certified Ultra ensures this 3-way speaker delivers optimal frequency response, wide dispersion, and low distortion. Featuring premium drivers, a precision crossover network, and an easy-to-install design, the Monolith THX-465IW offers an exceptional in-wall speaker solution.

  • Brand: Monoprice
  • Model: 142829
  • Type: 3-Way In-Wall Speaker
  • Certification: THX Certified Ultra
  • Frequency Response: 37Hz ~ 20kHz
  • Woofers: Four 6.5"
  • Midrange: 50mm Silk Dome
  • Tweeter: 25mm Silk Dome
  • Color: Black

Key Features

Premium Drivers: High excursion woofers. Silk dome midrange. Silk dome tweeter. Featuring carefully selected drivers that deliver a flat frequency response in the listening window, the THX 465IW features four 6.5" woofers, a 50mm silk dome midrange, and a 25mm silk dome tweeter.

Precision Crossover Network: The THX speaker series features carefully selected fourth order Linkwitz Riley crossover network acoustic filters. These sophisticated crossovers minimize sonic frequency overlap, reduce distortion, and are an excellent choice to minimize off axis response errors near the crossover frequency.

Easy Install: The heavy duty dog ear mounting system makes for a fast and problem free installation. The magnetically detachable grille is powder coated in white and can be painted to match any decor.

Timbre Match: Same drivers. Same soundscape. Monolith THX Certified in wall and in room speakers utilize the same drivers and crossover components, allowing speakers to be mixed and matched to suit your room! Use in wall speakers for the rears and in room speakers for the LCR, and you will remain timbre matched across the Monolith THX family.

THX Certified Ultra: THX Engineers complete hundreds of different scientifically formulated tests to ensure the highest audio standards possible.

Specifications

Brand
Monoprice
Model Number
142829
Certification
THX Certified Ultra
Woofer Size
Four 6.5"
Midrange Driver Size
50mm
Midrange Driver Material
Silk dome
Tweeter Size
25mm
Tweeter Material
Silk dome
Crossover Network
Fourth Order Linkwitz Riley
Mounting System
Dog Ear
Grille Finish
Powder Coated White (Paintable)

Pros & Cons

👍 Pros

  • THX Certified Ultra, ensuring it meets high audio performance standards after rigorous testing
  • Features premium drivers, including high-excursion woofers and silk dome midrange and tweeter, for quality sound
  • Equipped with a precision fourth-order Linkwitz Riley crossover network to minimize sonic frequency overlap and distortion
  • Easy installation with a heavy-duty dog ear mounting system, facilitating a fast and trouble-free setup
  • Timbre matched with other Monolith THX Certified speakers, allowing for seamless mixing and matching in a home theater system

👎 Cons

  • As an in-wall speaker, it requires professional installation or comfort with DIY home modifications
  • The white powder-coated grille may require painting to perfectly match specific room decor
  • Requires existing wall space for installation, which might not be available in all room configurations
  • The THX certification and premium components suggest a higher price point, potentially outside some budgets
  • The in-wall design means it cannot be easily repositioned after installation for acoustic adjustments

Frequently Asked Questions

"THX Certified Ultra" signifies that the Monoprice Monolith THX-465IW speaker has undergone hundreds of scientifically formulated tests by THX Engineers to meet the highest possible audio standards for home theater performance.
The Monolith THX-465IW features premium drivers, including four 6.5" high excursion woofers, a 50mm silk dome midrange, and a 25mm silk dome tweeter, all selected for a flat frequency response.
This speaker utilizes a precision fourth-order Linkwitz Riley crossover network, which are acoustic filters chosen to minimize sonic frequency overlap, reduce distortion, and improve off-axis response.
The speaker is designed for easy installation, featuring a heavy-duty dog ear mounting system for a fast and problem-free setup.
Yes, the magnetically detachable grille is powder-coated in white and can be painted to match any room decor.