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Monitor Audio Radius 90

Bookshelf speakers (High-gloss White)

9 Reviews | 4 questions - 11 answers

Item # 893R90PW

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Overview

Our take on the Monitor Audio Radius 90

We couldn't believe our eyes when we first unpacked the Monitor Audio Radius R90 bookshelf speakers. They were downright beautiful, and almost impossibly small. But the real surprise came when we got our first listen. Despite their compact size, the sound they delivered was open, room-filling, and spacious, with true-to-life imaging and a big soundstage. We've heard our share of compact monitors here at Crutchfield, but it's not every day that we come across such impressive performers in such a tiny package. Use a pair of R90s to create a compact music system in your home office or living room, or mount four or more around your home theater room for a surround sound system with superb detail and clear dialogue.

Room-filling sound from a tiny speaker

We couldn't believe our eyes when we first unpacked the Monitor Audio Radius R90 bookshelf speakers. They were downright beautiful, and almost impossibly small. But the real surprise came when we got our first listen. Despite their compact size, the sound they delivered was open, room-filling, and spacious, with true-to-life imaging and a big soundstage. We've heard our share of compact monitors here at Crutchfield, but it's not every day that we come across such impressive performers in such a tiny package. Use a pair of R90s to create a compact music system in your home office or living room, or mount four or more around your home theater room for a surround sound system with superb detail and clear dialogue.

Monitor Audio's secret sauce 

The Radius R90 benefits from many of the technical advances, materials, and construction techniques found in Monitor's renowned, top-of-the-line Platinum series speakers. Both its 4" woofer cone and 1" dome tweeter are made of a high-tech ceramic-coated aluminum/magnesium alloy. This exceptionally stiff, lightweight material allows the drivers 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.

Monitor Audio R90 bookshelf speakers

Whether you choose high-gloss black, white, or walnut veneer, Monitor Audio's R90 speakers look as fantastic as they sound.

Instead of using conventional screws, Monitor mounts each driver firmly into the cabinet using a single bolt that threads into its backplate, then attaches to the back of the enclosure. This mechanically decouples the driver and front baffle to enhance clarity and resolution, while acting as rigid cross bracing for a more solid, non-resonant cabinet. The lack of visible mounting hardware also adds to the R90's overall look of elegance.

Gorgeous build quality and design

Monitor Audio speakers have long been known for their sturdy, vault-like cabinet construction. The R90's enclosure feels solid and substantial, with an exterior clad in a beautifully finished high-gloss black, white, or real walnut wood veneer.

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Product Highlights:

  • frequency response: 80-35,000 Hz
  • sensitivity: 83 dB
  • recommended amplifier power: 30-100 watts
  • impedance: 8 ohms
  • ultra-rigid, lightweight C-CAM® (Ceramic-Coated Aluminum/Magnesium) cone material provides high efficiency and low distortion
  • 1" C-CAM gold dome tweeter for detailed sound and extended high-frequency response
  • 4" C-CAM mid/bass drivers for clear midrange and punchy bass
  • bass-reflex (ported) design with HiVe® II technology for reduced turbulence and higher velocity airflow
  • single bolt-through driver attachment provides mechanical decoupling and increased cabinet rigidity for greater clarity and resolution
  • five-way binding post speaker terminals
  • 4-15/16"W x 7-13/16"H x 6-7/16"D
  • weight: 4.6 lbs. each
  • warranty: 5 years
  • Our 60-day money-back guarantee

The Monitor Audio Radius 90 produces great sound and noticeable separation from a compact package. I have this set up in a 15' x 20' family room with the Radius 200 center channel. I also have an AR 12" subwoofer that helps with the lows.

Anonymous, Detroit, Mi

What's in the Box:

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

Monitor Audio Radius 90 Reviews

Average Customer Review(s):

(9 Reviews)

Great while they lasted

Stacy from PA on 7/11/2017

Crutchfield Customer Review (What's this?)

Great speakers while they lasted. Purchased 4 for fronts and surrounds along with 200 for the center. Started hearing major popping and sound distortions from the fronts. It turns out they are no longer working after 2 years. I guess they don't make like they used to applies to speakers now too.

Pros: Nice finish

Cons: Longevity

Monitor Audio Radius 90

Anonymous from Detroit, Mi on 4/12/2017

Crutchfield Customer Review (What's this?)

The Monitor Audio Radius 90 produces great sound and noticeable separation from a compact package. I have this set up in a 15' x 20' family room with the Radius 200 center channel. I also have an AR 12" subwoofer that helps with the lows.

Pros:

Cons:

Monitor Audio Radius 90

Anonymous from Yucaipa, CA on 2/27/2017

Crutchfield Customer Review (What's this?)

The sound is good but lacking in bass.

Pros:

Cons:

Monitor Audio Radius 90

Anonymous from Knoxville, TN on 12/22/2016

Crutchfield Customer Review (What's this?)

Excellent. It took a while to find shallow depth speakers with good sound. The staff was terrific.

Pros:

Cons:

Just what I needed

Bob G from Oakton, VA on 5/15/2016

Crutchfield Customer Review (What's this?)

Needed small, attractive speakers to put on the mantle in my living room for the stereo system I have there. The boxy shape allows me to place them on their side. They have a beautiful walnut exterior. The sound is great.

Pros: Appearance, size, and sound quality.

Cons:

Little Speakers/Big Sound

Mtbin2 from Illinois on 12/13/2015

Crutchfield Customer Review (What's this?)

I am blown away by the sound from these guys. I have them hooked up to a Marantz 1506 and that combo produces wonderful, dynamic sound. I was originally going to install a sub, thinking that the bass would be lacking but I haven't missed it yet. I just cant believe the size of the sound for how small these are. They blend well into the living room and I honestly can't imagine needing bigging speakers

Pros:

Cons:

Good Surrounds

DanS from Colorado on 7/2/2015

I needed a small bookshelf speaker for my surround speakers. My front is made of Monitor Audio Silver speakers. The Silver bookshelf were too big, but these fit the bill perfectly. Sound just like the Silver line, just smaller with less bass, perfect for my application.

Pros: Good sound, awesome build quality, beautiful speakers.

Cons:

Great Hi Fi Mini Monitor

Jeff from USA on 5/10/2015

Crutchfield Customer Review (What's this?)

Great Hi Fi Mini Monitor for music listening. I have this set up as 2.0 and it does everything I need in a small-medium sized room. Driving these with a Rega Brio R integrated amp and the musical performance is outstanding.

Pros: Imaging, Clarity, Detail

Cons: Size, low sensitivity 83 db

Perfect!!

Mike from Boca Raton, FL on 10/13/2014

Crutchfield Customer Review (What's this?)

After a long time spent researching options I chose the Monitor Audio Radius 90 desktop speakers for my office set up. The size was very important, it needed to be small and non intrusive. The speakers passed that test fully. They look great in black gloss on my desk next to my existing iMac and NAD D 3020 amplifier. How about the sound? The sound fully met my expectations; it was full and complete for a near field set up. Bass is a little light, but the speakers are small. I am not sure I could have found anything better. The speakers are very well made, solid and with first class connectors at the back. I have them sitting on my desk, but they have fittings which would enable them to be wall-hung. I added more substantial Sorbothane "Isolate It" vibration isolation feet which I felt were an upgrade from the small supplied rubber footings. I have no vibration on my desk even at higher volume levels. Working with the on-line advisor, I was also able to marry the Radius 90's to a small subwoofer which more than completed the sound for my office . I bought the Cambridge Audio Minx X200. The separate sub helps with music playback, but the Radius 90 sound just great on their own for most uses.

Pros: Great looking, well built and great sounding.

Cons: None

Details

Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Tweeter Type Dome
Tweeter Size (inches) 1
Midrange Size (inches) N/A
Woofer Size (inches) 4
Woofer Composition C-CAM
Woofer Surround Rubber
Power Range 30-100
Sensitivity 83 dB
Impedance (Ohms) 8
Frequency Response 80-35k Hz
Connector Type 5-way post
Bi-amp Inputs No
Height (inches) 7-13/16
Width (inches) 4-7/8
Depth (inches) 6-9/16
Weight (pounds) 4.6
Mounting Bracket Included No
Recommended Stand Height (inches) 31-36
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research

Features

Two-Way Speaker Design: The Monitor Audio Radius 90 bookshelf loudspeaker features a two-way speaker design with one 1" C-CAM gold dome tweeter and one 4" C-CAM cone woofer. The 1" C-CAM gold dome tweeter is optimized to deliver the finest and widest performance within the compact speaker cabinet. It benefits from a more efficient rear-venting design, releasing air trapped and compressed at the back of the tweeter dome, and guiding it around the drive assembly to a rear-loading chamber. The 4" C-CAM woofer features a large motor and voice coil for increased excursion, high power capability and reduced distortion. The C-CAM tweeter and woofer share an audible consistency producing a smooth transition of frequencies and a sense of realism and cohesion in the soundstage.

C-CAM Technology: The 1" tweeter and 4" woofer of the Radius 90 bookshelf loudspeaker utilize Monitor Audio's proprietary C-CAM speaker technology.

  • 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.
  • C-CAM Cone Woofer: Ceramic-Coated Aluminum/Magnesium is a material originally developed by the aerospace industry for jet engine components. Its properties are ideal for loudspeaker cones being extremely rigid, yet light enough to yield high overall efficiency. In manufacture, aluminum/magnesium alloy undergoes a three-stage stress-relieving process to remove surface deformation and molecular weakness. Once formed, the alloy cone is subjected to a high temperature anodic coating process in which a layer of pure ceramic alumina is depleted onto its surfaces to a depth of 50 microns, producing a completely rigid sandwich of alloy and heat-dissipating ceramic material. Conventional cones are liable to flex or twist in operation, producing a significant level of audible distortion. C-CAM cones have a much higher resistance to bending stress and therefore exhibit much greater fidelity over their entire operating range.

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.

HiVe II Bass Reflex Port: The Radius 90 uses a bass reflex cabinet with Monitor Audio's HiVe II port design for greater efficiency and bigger bass response from a smaller speaker. The HiVe II bass reflex port is shaped to have the same effect on airflow as a gun-barrel on a bullet. Rifled grooves inside the port help to accelerate the flow and reduce turbulence, so air moves in and out of the port more efficiently, for a faster more dynamic bass response.

Stylish Cabinet: The Monitor Audio Radius 90 features a beautiful precision cabinet in a gloss black, gloss white, or walnut veneer lacquer finishes. 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 90 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 90 loudspeakers on a table, shelf, or stand. And thanks to its rear-panel 1/4"-20 threaded insert, the Radius 90 can also be fixed to a wall using an optional wall-mount bracket (sold separately).

Note: Because the threaded insert and the binding-post terminals are positioned so close together, many optional wall-mount brackets will not fit.

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.

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Solid full sound for a small speaker. Look great on a book shelf. [ R  Apr 28, 2016 ]
small, great reviews and will work in the room i need them in. [ Eduardo  Apr 21, 2016 ]
Sound quality. [ M  Nov 29, 2016 ]
Brand name and positive reviews [ Les  Sep 01, 2016 ]
Small size, appearance, square shape, good specs and reviews. [ B  Apr 18, 2016 ]

4 questions already asked

Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Kenny  Mar 08, 2017 ]  Staff
They do not come with mounting hardware. [ John  May 02, 2016 ]
They don't but they have a threaded insert on the back that's compatible with most wall mounts. The 225 center channel comes with a mounting bracket. [ James  Apr 29, 2016 ]
No, it does not come with mounting hardware. But it accepts a standard mount with a 1/4 inch UNC thread. The Monitor Audio company makes a mount that looks especially good but it's not available through Crutchfield (I asked them.) [ B  Apr 29, 2016 ]
These would be awesome surround speakers especially if they timbre match the rest of your speakers. Very detailed and can take a good amount of power for a fairly small speaker. Hope this helps. [ Thorston  Feb 19, 2017 ]
Hi DocSteve - yes, I think the R90s will work well in that configuration. I have been really impressed with them as side mounted surrounds in a 5:1 system with matching monitor towers and center. [ Adam  Feb 18, 2017 ]
They would be terrific! [ scott  Feb 17, 2017 ]
These may be overkill for use as rear speakers. They are great for front side speakers, depending on size of room. Am using the smaller radius 45 for rear speakers and those are small but powerful enough for great rear surround sound. [ Rahul  Feb 17, 2017 ]
these speakers are great. Use them for a medium sized stereo system at the lake and they sound marvelous. Would be very good for rear speakers. [ Donald  Feb 17, 2017 ]
We used Pinpoint mounts (AM20) which include a faceplate to cover existing pre-wire box. They are strong enough to hold radius 90 speakers to wall. [ Rahul  Feb 17, 2017 ]
crutchfield has wall mounts that easily attach to the speakers and wall. very clean look and sturdy. [ Donald  Aug 28, 2016 ]
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