---
product_id: 175948596
title: "Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black"
brand: "monoprice"
price: "€ 209.96"
currency: EUR
in_stock: false
reviews_count: 3
url: https://www.desertcart.fi/products/175948596-monolith-thx-365iw-thx-ultra-certified-3-way-in-wall
store_origin: FI
region: Finland
---

# 35Hz Frequency Response 200W Max Output Easy Install Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black

**Brand:** monoprice
**Price:** € 209.96
**Availability:** ❌ Out of Stock

## Summary

> 🎉 Elevate Your Sound Game with Monolith!

## Quick Answers

- **What is this?** Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black by monoprice
- **How much does it cost?** € 209.96 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/175948596-monolith-thx-365iw-thx-ultra-certified-3-way-in-wall)

## Best For

- monoprice enthusiasts

## Why This Product

- Trusted monoprice brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Integration:** Mix and match with Monolith's LCR design for a cohesive soundscape that elevates your entertainment.
- • **Precision Engineering:** Fourth order Linkwitz-Riley crossover minimizes distortion for crystal-clear audio across all frequencies.
- • **Effortless Installation:** Heavy-duty dog ear mounting system and magnetically detachable grille make setup a breeze.
- • **Unmatched Sound Quality:** Experience THX Ultra Certified audio that transforms your home theater into a cinematic paradise.
- • **Versatile Compatibility:** Connect effortlessly with a range of devices, from projectors to smartphones, for a truly immersive experience.

## Overview

The Monolith THX-365IW is a premium in-wall speaker designed for home theater enthusiasts, featuring a 1-inch silk dome tweeter, dual 6.5-inch woofers, and a sophisticated crossover network. With a maximum output of 200 watts and a frequency response down to 35 Hz, it delivers exceptional sound quality and easy installation, making it the perfect choice for a surround sound system.

## Description

The THX In Wall Speaker Series delivers the high level of accuracy and reproduce all the dynamics and detail of the best home theater soundtracks and music. Each speaker has been THX certified, ensuring optimal frequency response, dispersion, and low distortion. THX certification ensures that the sound from the speaker is as the audio engineer intended. The THX-365IW features premium drivers, THX certification, a sophisticated crossover network, and an HDF cabinet ensure that you've never experienced home theater sound that is this dynamic, detailed, or immersive from an in wall speaker.

## 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-3651W features two 6. 5in woofers, a 2in silk dome midrange, and a 1in silk dome tweeter. The silk dome midrange operates in the 550Hz-1. 9kHz range, improving power handling, lowering distortion, and improving the polar response, which allows the speaker to achieve higher SPL.
- The 6. 5in high excursion Woofers feature a long fiber pulp cone, NBR Surround, and are designed with shorting rings to keep distortion at a minimum. The combined driver design enables the speaker to reach Sonic heights and deliver accurate sound For the best in home theater dynamics and detail
- Precision crossover network: The THX speaker series feature carefully selected fourth order Linkwitz-Riley crossover network acoustic filters. This sophisticated crossover minimizes sonic frequency overlap, reduces distortion, and is 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. Lcr design. The 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! Utilize in wall speakers for the rears and in room speakers for the LCR, and you will remain timbre matched across the Monolith THX family

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 200 Watts |
| Connectivity Technology | Coaxial |
| Audio Driver Type | Dynamic Driver |
| Item Weight | 19.7 Pounds |
| Item Dimensions D x W x H | 3.8"D x 11.1"W x 22.7"H |
| Number of Audio Channels | 3.0 |
| Frequency Response | 35 Hz |
| Compatible Devices | Projector, MP3 Player, Laptop, Desktop, Television, Tablet, Smartphone |
| Speaker Size | 6.5 Inches |
| Woofer Diameter | 3 Inches |
| MP3 player | No |
| Specific Uses For Product | For Surround Sound Systems |
| Controller Type | Ring |
| Is Waterproof | FALSE |
| Warranty Type | Limited |
| Control Method | Touch |
| Audio Output Mode | Surround |
| Mounting Type | Wall Mount |
| Speaker Type | Woofer |
| Additional Features | THX |
| Recommended Uses For Product | For Surround Sound Systems |
| Subwoofer Diameter | 3 Inches |

## Product Details

- **Brand:** Monoprice
- **Speaker Maximum Output Power:** 200 Watts
- **Frequency Response:** 35 Hz
- **Connectivity Technology:** Coaxial
- **Audio Output Mode:** Surround

## Images

![Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black - Image 1](https://m.media-amazon.com/images/I/41MOwLW33CL.jpg)
![Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black - Image 2](https://m.media-amazon.com/images/I/41Ttej5tykL.jpg)
![Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black - Image 3](https://m.media-amazon.com/images/I/51CZEznNeOL.jpg)
![Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black - Image 4](https://m.media-amazon.com/images/I/51RpeSuRR8L.jpg)
![Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black - Image 5](https://m.media-amazon.com/images/I/51CF53XTvML.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Speakers!
*by N***. on November 21, 2023*

The speakers have a great depth of sound and are perfect for budget to mid-range home theater setups. The speakers are reasonably priced and there are not many speakers that can compete with it in terms of price to performance. Overall, I would highly recommend these speakers to anyone looking for a high-quality and affordable speaker.

### ⭐⭐⭐⭐⭐ Great sound and price
*by M***E on November 11, 2022*

Have 7 of these and they are great. I have the crossover set to 80Hz. I am still breaking in the speakers, but the speakers are so crisp and clear with a natural response. Lots for speaker for the price. I recommend.

### ⭐ The units I received would never pass THX certification.
*by E***S on December 18, 2020*

Update:Dropped another star - By the time I received replacements for the failing Left and Center channels, the replacement Right is already starting to fail after only 2 weeks, and just like the prior ones is showing significant degradation.Do not buy these speakers - all of the ones I have encountered (including the replacements) are from the same initial production shipment of 300 units. I have now had to replace serial numbers M34367BG1900285, M34367BG1900112 and M34367BG1900105 - and now one of the replacements (M34367BG1900154) is showing the same signs of failure as the others.So far that's 100% failure within the first 30 days of installation for 4 speakers. I'm convinced this is either a faulty batch of units, or there is a fatal design issue with the speakers.I should note that the other TEN Monoprice speakers I purchased for this project (2 Monolith subs and 8 surround/atmos) speaker have been completely flawless. This particular model of THX LCR speakers are the only ones with issues.If the Left and Center replacements I just received follow the same path, I will be reporting Monoprice to THX, as there is no way the actual manufactured units would ever pass their testing.Amazon has been great about replacing these as they fail, and Monoprice has refunded the ones I bought from them, but Monoprice needs to step up and resolve whatever is going on with these speakers.Original review:The pictures of the EQ corrections to get my set of 3 of these speakers to flat says everything you need to know.As you can see, the left channel is not correctable to flat. That's because the 1" silk dome tweeter is only operating at about 25%.The right channel is a brand-new replacement for the original right channel which suffered a complete tweeter failure after less than 60 days - so this curve is what it looks like when it's brand new.The center channel is correctable to flat, but you can see that it varies significantly from the brand new right channel.What does this mean? 2 of the 3 speakers have failed, and the third has varied significantly from where it started. To some degree you expect to see improved low-end as the speakers complete their break-in period - but you shouldn't see this kind of tweeter attenuation, much less the complete failure I've seen in 2/3. My guess is that the center is just a matter of time.Add to this that the design of the magnetic grills is such that they slide down the front until they expose about 1/2 of the top of the speaker frame. If you want to use the grills, you will need to engineer a solution to hold them in place. Normally on a magnetic speaker grill, the magnets are only required to hold the grill against the frame where it fits into a locked position. In this design, the grill has a bit more than 1/2" degree of freedom to slide in any direction - and since magnets and friction are the only thing holding them in place, a little bit of vibration causes them to slide until the edge of the grill comes into contact with the magnets. It takes about 15 minutes at movie reference volumes for this to happen. I just took them off since I have black walls in the front of my theater. I may try to rig something.My hope is that I was extremely unlucky and just got a bad batch and that the replacements will function properly over time. I will jump through a lot of hoops to avoid having to re-drywall and create new cutouts for another brand of speakers - so I really hope these work out.Lastly, unfortunately Monoprice is not really a high-end audio company, so although these represent a great value for a THX-certified speaker, you will not be speaking with an audio expert if you contact them, even though they have a direct channel for Monolith support. Expect that you will be much better informed than the support staff you speak to.On the plus side, Amazon is standing behind these and will have replaced them all after only about 60 days.If everything ultimately turns out great I will update my review, but for now my advice is to stay away from these particular speakers.Last aside: So far the other MP speakers (alphas and carbon fiber 3-ways) that I chose for the surround and atmos channels are working perfectly. Those "cheap" speakers seem to be much better designed than these much more expensive so-called THX models. They are very consistent and correctable to flat, and the magnetic grills are perfect. Additionally, the Monolith 12" powered subs are phenomenal - so although I don't recommend these, I've had great luck with all of the other MP gear in my project.

## Frequently Bought Together

- Monolith THX-365IW THX Ultra Certified 3-Way in-Wall Speaker, 1in Silk Dome Tweeter, for Home Theater, Easy Install,Black
- Monolith THX-465IW THX Certified Ultra 3-Way in-Wall Speaker, 37Hz ~ 20kHz Frequency Response, Easy Install, for Home Theater,Black

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-21*