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Monoprice Announces Monolith In-Wall Subwoofers

Monoprice adds to its growing Monolith Subwoofer lineup with two in-wall models. Find out what this means for you.

Monoprice Monolith M-IWSUB8 and M-IWSUB82 In-Wall Subwoofers

Monoprice has been very active in the speaker and subwoofer category in the past several months with a number of new product introductions under their Mononlith brand (see links at the end of this article). 

It also looks like they aren’t stopping as they have announced the M-IWSUB8 and M-IWSUB82 Subwoofers.

What makes these subwoofers different is that they are designed for in-wall installation. Although it takes a little more work to make sure you place them in the right spot before you cut into your walls, they eliminate the need to find floor space for traditional subwoofer boxes. 

However, it’s also important to note that, unlike most subwoofers, these subwoofers are passive. This means you have to place an external subwoofer amplifier between the subwoofer output of a home theater receiver and the input connections on the subwoofer as they don’t have their own built-in amps – more on this at the end of the article.

If you think that an in-wall subwoofer might be the right solution for your setup, let’s check out the features and specs of these latest entries from Monolith. 

Monolith M-IWSUB8

Monoprice Monolith M-IWSUB8 In-Wall Subwoofer
M-IWSUB8

Product Number: 42831

Driver Number and Size: 1 X 8-inches 

Driver Material: Polypropylene cone with rubber surround.

Grill: Removable magnetic and paintable to your color preference (Grill comes in White).

Frequency Response: 36 – 200Hz ±3dB

Sensitiivty: 91dB 

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Monoprice Monolith M-IWSUB8 Flat
M-IWSUB8

Crossover Type: Acoustic filter

Crossover Frequency: 120Hz @ 12dB/oct

Impedance: 4 ohms

Input Connectors: Spring‑loaded binding posts.

Dimensions:  11.9 x 13.3-inches (With Grill), 10.8 x 12.2-inches (Without Grill)

Easy Install: Heavy‑duty mounting tabs are provided for easy installation. The subwoofer frame is designed to fit within standard 16″ wood stud walls.

Monolith M-IWSUB82 Dual 8-inch In-Wall Subwoofer

Monoprice Monolith M-IWSUB82 In-Wall Subwoofer Front and Rear
M-IWSUB82

Product Number: 42832

Driver Number and Size: 2 x 8-inches

Grill: Removable magnetic and paintable to your color preference (Grill comes in White).

Frequency Response: 36 – 200Hz ±3dB

Sensitiivty: 91dB 

Crossover Type: Acoustic filter

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Monoprice Monolith M-IWSUB82 In-Wall Subwoofer Profile
M-IWSUB82

Crossover Frequency: 120Hz @ 12dB/oct

Impedance: 4 ohms

Input Connectors: Spring‑loaded binding posts.

Dimensions: 11.7 x 21.3 inches (With Grille), 10.8 x 20.4 inches (Without Grille)

Easy Install: Heavy‑duty mounting tabs are provided for easy installation. The subwoofer frame is designed to fit within standard 16″ wood stud walls.

Subwoofer Amplifier

Monoprice Monolith SWA-400 Subwoofer

As mentioned at the top of the article, to use these subwoofers, you need to connect an external subwoofer amplifier. You can use almost any available subwoofer amp that is compatible with 4 ohm impedance speaker loads, but Monoprice also offers its own; the SWA-400 (400 watts output with DSP and presets to optimize performance with 8, 10, or 12-inch in-wall subs) which is priced at $308.99 on Monoprice.com.

Monoprice Monolith SWA-400 Subwoofer Amplifier Front and Rear
Monoprice Monolith SWA-400 Subwoofer Amplifier

Tip: If you are using more than one in-wall subwoofer, you will need a separate amp for each one. 

Price & Availability

The M-IWSUB8 (Product Number: 42831) – $399.99 at Monoprice.com.

The M-IWSUB82 (Product Number: 42832) – $599.99 at Monoprice.com

Tip: If you don’t have experience installing in-wall speakers, you should consult a home theater installer. 

Monoprice Monolith M-IWSUB8 Crossover
M-IWSUB8 Crossover
monolith-1wsub82-crossover
M-IWSUB82 Crossover

Also, check out our other recent Monoprice Monolith Subwoofer and Speaker Reports:

Monoprice Monolith Dual Driver THX Ultra M-210 and M-212 Subwoofers

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Monoprice Shakes Things Up With Two New Massive THX Subwoofers

Monoprice Monolith THX Subwoofers Shake The Foundation

Monoprice Announces Monolith THX LCR & Satellite Speakers

Monoprice Monolith Encore Home Theater Speakers Are Very Affordable

Bonus: Subwoofer Setup Tips and Tricks

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