Monolith M-Iwsub82 Dual 8In In-Wall Subwoofer

SKU: MNP-42832
Unit Price
US$ 861.20
US$ 861.20
US$ 856.031%
US$ 853.011%
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Nominal Impedance
4 ohms
Input Connectors
Spring‑loaded binding posts
Frequency Response
36 ~ 200 Hz ±3dB
91dB (2.83V@1m)
Crossover Frequency
120Hz @ 12dB/oct
Crossover Type
Acoustic filter
Woofer Drivers
2x 8" polypropylene cones with rubber surrounds

Monolith™ by Monoprice™
Add powerful bass to your in‑wall or in‑ceiling home theater system

The Monolith™ by Monoprice™ M‑IWSUB82 Dual 8" In‑Wall Subwoofer adds powerful bass to your in‑wall or in‑ceiling home theater system. Equipped with two high‑end, compact, 8" polypropylene woofers, heavy duty mounting tabs, and a paintable magnetic grille, the M‑IWSUB82 can be used in both new construction or seamlessly added to existing systems. The 91dB sensitivity ensures an easy pairing with just about any amplifier. The Monolith by Monoprice M‑IWSUB82 Dual 8" In‑Wall Subwoofer is designed to add thunderous bass, without taking up valuable floor space.

  • Dual 8" passive in‑wall subwoofer
  • Two polypropylene cones with rubber surrounds
  • Heavy‑duty mounting tabs for easy installation
  • Designed to fit within standard 16" wood stud walls
  • Magnetic, paintable grille
  • Spring‑loaded binding posts
  • 36 ~ 200 Hz frequency response
  • 91dB sensitivity


The Monolith™ M‑IWSUB82 features two 8" polypropylene cone subwoofers with rubber surrounds to provide ample bass in a home theater, audio, or media installation.


The heavy‑duty mounting tabs make for a fast and problem free installation. The magnetically detachable grille is powder coated in white and can be painted to match any decor.

5 Year Replacement Warranty

Monoprice™ not only stands behind this product with a 5 year replacement warranty, we offer a 30 day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.

30 Day Money Back Guarantee

Monoprice stands behind every product we sell with a 30 day money back guarantee! If the product you purchase does not satisfy your needs, send it back for a full refund.

Quality at a Fair Price

Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.

Hassle Free Packaging

Monoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you.

Service and Support

You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!

Monoprice™, Monolith™, the Monolith logo, and all Monoprice logos are trademarks of Monoprice Inc.

Warning: This product can expose you to Phthalates, which is known to the State of California to cause cancer and reproductive harm. For more information, go to
Shipping from
This product is shipped from our supplier's warehouse in Rancho Cucamonga, CA, United States
Our guarantee
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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