Skip Navigation

Monitor Audio Radius 45

Ultra-compact satellite speakers (Walnut)

2 Reviews | 3 questions - 3 answers

Item # 893R45W

Low Stock

 Ships FREE

Add to Cart

Ask an expert

Our VA-based experts can help.

1.844.320.4405

Chat Email

Overview

Our take on the Monitor Audio Radius 45

We weren't sure if it was really possible for a speaker this small to still perform effectively. Boy, were we surprised! Even though the Radius 45 may be the smallest speaker Monitor Audio has ever built, this tiny cube delivers Monitor's signature wide-open sound in spades. With its front-firing 3" mid/bass driver and rear-firing gold dome tweeter, the R45 will fill your living space with a tonal presence and spaciousness that must be heard to be believed. Pair these speakers with Monitor Audio's Radius 380 subwoofer to create an ultra-discreet, high-performance music or multichannel surround sound system. 

Pure concentrated fun

We weren't sure if it was really possible for a speaker this small to still perform effectively. Boy, were we surprised! Even though the Radius 45 may be the smallest speaker Monitor Audio has ever built, this tiny cube delivers Monitor's signature wide-open sound in spades. With its front-firing 3" mid/bass driver and rear-firing gold dome tweeter, the R45 will fill your living space with a tonal presence and spaciousness that must be heard to be believed. Pair these speakers with Monitor Audio's Radius 380 subwoofer to create an ultra-discreet, high-performance music or multichannel surround sound system. 

Monitor Audio's secret sauce 

The Radius 45 benefits from many of the technical advances, materials, and construction techniques found in Monitor's top-of-the-line speakers. Its 3/4" dome tweeter is made of a high-tech ceramic-coated aluminum/magnesium alloy. This exceptionally stiff, lightweight material allows the driver to respond swiftly and precisely to the audio signal for greater accuracy. The tweeter also gets an anodized coating of gold that helps ensure smooth, extended highs.

Gorgeous build quality and design

Monitor Audio speakers have long been known for their sturdy, vault-like cabinet construction. The R45's rigid MDF enclosure feels solid and substantial, with an exterior clad in a beautiful high-gloss black or white finish.

Got wire?

Most speakers don't include any. Read our article about choosing and installing speaker wire.
Shop our selection of speaker wire.

Product Highlights:

  • frequency response: 120-20,000 Hz
  • sensitivity: 87 dB
  • recommended amplifier power: 15-50 watts
  • impedance: 8 ohms
  • ultra-rigid, lightweight C-CAM® (Ceramic-Coated Aluminum/Magnesium) cone material provides high efficiency and low distortion
  • rear-firing 3/4" C-CAM gold dome tweeter
  • 3" MMP® II (Metal Matrix Polymer) mid/bass driver
  • acoustic-suspension (sealed) cabinet design
  • five-way binding post speaker terminals
  • 3-15/16"W x 3-15/16"H x 4-7/8"D
  • weight: 2.25 lbs. each
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 Satellite loudspeakers
  • 2 Grilles (attached)
  • 8 Rubber feet
  • Grille removal tool
  • Owner's Manual
  • Important Safety Instructions
Reviews

Monitor Audio Radius 45 Reviews

Average Customer Review(s):

(2 Reviews)
rewards card
Great Gear Giveaway

Submit a review and enter to win a $350 rewards card

Review this product

Thanks for submitting your review

Most reviews are processed and published within 5 business days. You will receive a confirmation email once your review has been published.

Your Review

Use the stars below to rate the overall product on a scale of 1-5
1500
Upload your photos

Not visible. Email associated with order.
(e.g., Charlottesville, VA)

Additional Fields (optional)

500
500

By submitting this review, you agree to our terms and review guidelines.

Filter by rating

Customer photos


<< >>
Details

Hands-on research

Product Research

Features

Applications: The Monitor Audio Radius 45 satellite loudspeaker is perfect for discrete sound around your home, or partnered with a Radius powered sub (sold separately) for big stereo sound, or used as surround and surround back speakers in your home theater.

Two-Way Speaker Design: The Monitor Audio Radius 45 features a two-way speaker design with one rear-firing 3/4" C-CAM gold dome tweeter and one front-firing 3" MMP II cone woofer. The tweeter is rear-firing to enhance sound dispersion characteristics. The tweeter and woofer share similar audible consistency producing a smooth transition of frequencies and a sense of realism and cohesion in the soundstage.

  • C-CAM Gold-Dome Tweeter: The gold dome tweeter is formed from a ceramic-coated aluminum/magnesium alloy, gold anodized to a specific thickness for ideal stiffness and damping characteristics. Its new profile and surround geometry have been developed using advanced modeling tools, to provide the optimum qualities for accurate sound reproduction. The new design moves the first order of breakup to beyond 35kHz, producing a linear response way beyond audibility, which matches the wide frequency bandwidth available from HD music and cinema sound formats. The gold dome is thinner, lighter, more rigid and therefore more efficient than domes made from other materials which are prone to distortion in the audio band.
  • Metal Matrix Polymer (MMP II) Woofer: Metal Matrix Polymer driver cones have a polypropylene diaphragm injected with metallic particles to offer a rigid and responsive structure. They are manufactured using a sophisticated high-pressure injection process, which modulates cone thickness at critical points to optimize stiffness and consistency, resulting in a superior sonic performance.
Note: The Radius 45 incorporates a thermal protection device, which helps to protect the woofer and tweeter from permanent damage.

Single Through-Bolt Mount: The tweeter and woofer are fixed to the cabinet with a single through-bolt driver fixing mount. This single-through-bolt mount design provides mechanical de-coupling and enhanced midband clarity and resolution. The through-bolts also act as rigid cross bracing to give a very solid non-resonant cabinet.

Stylish Cabinet: The Monitor Audio Radius 45 features a beautiful precision cabinet in a gloss black, gloss white, or walnut finish. The cabinet's smooth rounded edges, silver trim, and metal mesh grille add to the style and look of the speaker.

Gold-Plated Binding Posts: The Radius 45 is fitted with gold-plated binding post speaker terminals that will accept bare wire (up 12AWG), pin-connectors, spade connectors, and banana plugs (single or dual).

Mounting Options: Self adhesive rubber feet are provided to prevent movement due to vibration when using the Radius 45 loudspeakers on a table, shelf, or stand. And thanks to its rear-panel 1/4"-20 threaded insert, the Radius 45 can also be fixed to a wall using an optional wall-mount bracket (sold separately).

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

good reviews [ Ricardo De  Jan 13, 2016 ]
I choose this to complement my Polk speakers that I currently have. These speakers were recommended by one of your experts. [ Kenneth J.  Oct 28, 2016 ]
Needed an unobtrusive surround speaker that blended well with existing furniture. [ Brett  Dec 06, 2017 ]

3 questions already asked

They do feature a standard 1/4"-20 threaded insert for use with optional wall mount brackets. You'll find all of the compatible models by clicking the "Accessories" tab on the speaker's main webpage and then "Speaker Wall Mounts". I hope that helps. My bio: https://www.crutchfield.com/bio/Ryan [ Ryan  Jan 18, 2018 ]  Staff
I currently have the speaker mounted on the walls and the sound is fantastic [ SHAWN P  Sep 23, 2015 ]
I am using them as rear speakers with infinity center channel and the sound great. [ Ricardo De  Dec 03, 2016 ]
Articles