Monolith Thx Certified Satellite Speakers (Pair)

SKU: MNP-41288
Unit Price
US$ 330.12
US$ 330.12
US$ 328.141%
US$ 326.981%
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Nominal Impedance
4 ohms
Weight (each)
4.2 lbs. (1.9 kg)
Input Connectors
5‑way binding posts
Frequency Response
80Hz ~ 20kHz ±3dB
81.0dB (2.83V@1m)
Recommended Amplifier Power
25 ~ 125 watts
4.5" polypropylene cone with NBR surround
20mm silk dome coaxial with waveguide and neodymium magnet
Black PVC
Sealed MDF cabinet
Low‑pass filter
1.7kHz @ 12dB/oct
High‑pass filter
1.7kHz @18dB/oct
Dimensions (wxhxd) (each)
6.0" x 6.3" x 5.9" (153 x 160 x 150 mm)

Monolith™ by Monoprice™
A truly immersive experience from your home theater or gaming systems

The Monolith™ THX® Certified Compact Satellite Speakers feature a high excursion concentric driver in a compact enclosure that delivers accurate performance down to 80Hz. The speakers are THX® Certified, ensuring an accurate and powerful listening experience as accurate to the source as possible. The Monolith THX® Certified Compact Satellite Speakers are quick and easy to setup ‑ simply connect it to any multichannel receiver or amplifier and pair it with a capable subwoofer for a fantastic cinema or gaming experience. These speakers are included in the complete , allowing you to add additional satellite speakers for additional audio channels.

  • THX® Certified
  • Compact Form Factor
  • Wall Mounting Keyhole
  • MDF Enclosures
  • Easy to Connect


The M518HT Monolith™ THX® Certified Compact Satellite Speakers feature 4.5" concentric drivers, each with inset 20mm silk dome tweeter. The polypropylene cone has a thick NBR surround and the silk dome tweeter is equipped with a waveguide and neodymium magnets. The driver has been tuned for maximum performance and has a flat frequency response down to 80Hz.


Each M518HT satellite speaker has a keyhole mount, so it can be easily hung on a wall with a single screw.

For almost 40 years, THX has set the standard for the audio and visual fidelity of entertainment experiences. THX® Certification is a globally recognized assurance of uncompromising quality, consistency and performance. We blend art, technology, and the dynamics of real world listening and viewing environments to ensure products deliver the artist's true vision.

THX® Certification
Using industry standards and a proprietary testing methodology, THX engineers evaluate and certify the audio and visual fidelity of consumer electronics to ensure they deliver the optimal entertainment experience. In cinemas, at home, and on‑the‑go, your entertainment comes alive with THX.

Certification Process

What We Test
THX engineers perform hundreds of audio and video performance and quality assurance tests before a product is confirmed to be THX® Certified.

AUDIO: We analyze everything from output levels, frequency response, signal‑to‑noise, distortion and bass management to recreate high impact cinema sound and best‑in‑class audio fidelity.

VIDEO: We test color accuracy, panel performance, and video processing, to confirm a display delivers accurate images and pristine video performance in every frame.

Why Certification Matters
The THX® Certified benchmark offers consumers the assurance of superior audio or visual performance from consumer electronics.

  • THX offers the industry's most rigorous testing process
  • THX guarantees high performance and premium build quality

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.

THX® and the THX logo are the property of THX Ltd., registered in the U.S. and other countries.

Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other 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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