Monitor Audio has launched the Radius Series 4G, a redesigned compact speaker range aimed at listeners and installers who need serious sound without large cabinets taking over the room.
The new lineup includes the Radius 1, Radius 3, and Radius On-Wall, supported by matching floor stands, desk pads, and wall bracket options. That gives the Radius Series 4G a broader role than a typical small speaker refresh. It can be configured for two-channel listening, desktop audio, multi-room systems, home theater, and commercial installations where space, appearance, and mounting flexibility matter almost as much as sound quality.
Monitor Audio is positioning Radius Series 4G around its Transparent Design Philosophy, but the bigger story is practical: compact loudspeakers that are designed to look finished in modern residential and commercial spaces, while still being flexible enough for stereo, surround, and near-field applications. Small speakers are often treated like compromise products. Radius 4G looks more like Monitor Audio trying to make the category useful again.
Compact Speakers, Smarter Engineering
The Radius Series 4G is still a compact speaker range, but Monitor Audio has put meaningful engineering into this generation rather than simply updating the cabinets and calling it a day.
The core driver technology remains Monitor Audio’s C-CAM cone material, which uses a ceramic-coated aluminium/magnesium structure designed to be light, rigid, and resistant to unwanted flexing. For Radius 4G, that driver platform now incorporates RST III cone geometry, a surface pattern developed to reduce breakup and resonance across the frequency range. In a small speaker, that matters. There is only so much cabinet volume to work with, so driver control becomes a much bigger part of the performance equation.
The tweeter has also been redesigned. Radius Series 4G uses a new C-CAM Gold Dome tweeter with an external magnet motor system, bringing it closer in concept to a full drive unit rather than relying on a more conventional internal puck magnet design. Monitor Audio says the goal is greater control and cleaner high-frequency performance, which should help the Radius models sound more open without becoming bright or thin.
The crossover networks have also been reworked with new measurement, listening, and component selection. That is not the flashiest part of the story, but it is often where compact speakers either come together or fall apart. Good drivers still need to be integrated properly, especially when the speaker is being used for desktop listening, wall-mounted applications, or home cinema channels.
Cabinet construction has received attention as well. Monitor Audio uses Through-Bolt Driver Bracing to lock the drive units to the rear of the cabinet at a specific torque, improving rigidity while reducing unwanted chassis resonance. Each model also includes Monitor Audio’s HiVe II port design, created to improve airflow and bass control. On the new Radius 3, the port is 50 percent larger than the previous generation, which should help it deliver more low-frequency output from a still-compact enclosure.
The accessory range is also part of the story. The Radius 4G Floor Stand uses wooden tripod legs with internal cable routing, giving the speaker a more furniture-friendly presence. The Desk Pad is made from vibration-isolating rubber and gives the speaker a slight upward tilt for near-field listening. Add in the wall bracket options, and Radius 4G starts to look less like a single-use compact speaker and more like a flexible system for stereo, desktop, surround, multi-room, and commercial installation use.
Monitor Audio Radius Series 4G Product Lineup
Monitor Audio Radius 1 4G
The Radius 1 4G is the smallest model in the new Radius Series 4G lineup, designed for discreet AV, surround, multi-room, desktop, and compact stereo applications. It uses a 4-inch RST III bass/mid driver with Monitor Audio’s C-CAM cone technology and a 19 mm C-CAM Gold Dome tweeter in a sealed 2-way cabinet.
Key specs and options:
- Price: $525 per pair
- System: 2-way compact speaker
- Drivers: 4-inch RST III bass/mid driver, 19 mm C-CAM Gold Dome tweeter
- Frequency response: 100 Hz to 35 kHz, in-room, -6 dB
- Sensitivity: 82 dB
- Nominal impedance: 8 ohms
- Minimum impedance: 3.8 ohms at 950 Hz
- Power handling: 50 watts
- Recommended amplifier power: 25 to 50 watts into 8 ohms, 50 to 100 watts into 4 ohms
- Bass alignment: Sealed
- Crossover frequency: 3.2 kHz
- Dimensions: 5 5/16 x 5 5/16 x 6 1/8 inches
- Weight: 3 lb 15 oz each
- Finishes: High Gloss Black, Satin White
- Sold as: Pair
- Compatible mounts: MASM, FIX-M
Monitor Audio Radius 3 4G
The Radius 3 4G is the larger mini-monitor in the range and the most flexible choice for stereo, TV, gaming, desktop, multi-room, and small commercial installations. It steps up to a 4.5-inch RST III bass/mid driver, a 25 mm C-CAM Gold Dome tweeter, and a ported cabinet for deeper bass extension than the Radius 1 4G.
Key specs and options:
- Price: $725 per pair
- System: 2-way compact mini-monitor
- Drivers: 4.5-inch RST III bass/mid driver, 25 mm C-CAM Gold Dome tweeter
- Frequency response: 44 Hz to 35 kHz, in-room, -6 dB
- Sensitivity: 84 dB
- Nominal impedance: 8 ohms
- Minimum impedance: 4 ohms at 250 Hz
- Power handling: 75 watts
- Recommended amplifier power: 40 to 75 watts into 8 ohms, 75 to 150 watts into 4 ohms
- Bass alignment: Ported
- Port tuning frequency: 53 Hz
- Crossover frequency: 2.7 kHz
- Dimensions: 10 1/16 x 5 7/8 x 7 15/16 inches
- Weight: 8 lb 3 oz each
- Finishes: High Gloss Black, Satin White
- Sold as: Pair
- Compatible mount: FIX-M
- Placement options: Desktop, floor stand, or wall mount
Monitor Audio Radius On-Wall 4G
The Radius On-Wall 4G is the TV and home cinema model in the Radius 4G range. It is designed for horizontal or vertical wall placement around a screen and uses two 4.5-inch RST III bass/mid drivers with a 25 mm C-CAM Gold Dome tweeter in a slim ported cabinet. A wall bracket and fixing template are supplied.
Key specs and options:
- Price: $575 each
- System: 2-way on-wall speaker
- Drivers: Two 4.5-inch RST III bass/mid drivers, 25 mm C-CAM Gold Dome tweeter
- Frequency response: 69 Hz to 35 kHz, in-room, -6 dB
- Sensitivity: 90 dB installed
- Nominal impedance: 8 ohms
- Minimum impedance: 4.4 ohms at 700 Hz
- Power handling: 100 watts
- Recommended amplifier power: 50 to 100 watts into 8 ohms, 100 to 200 watts into 4 ohms
- Bass alignment: Ported
- Port tuning frequency: 62 Hz
- Crossover frequency: 2.3 kHz
- Dimensions: 29 1/2 x 6 1/16 x 3 1/16 inches
- Weight: 14 lb 2 oz each
- Finishes: High Gloss Black, Satin White
- Sold as: Single
- Installation: Horizontal or vertical wall mounting, supplied bracket and fixing template
Monitor Audio Radius Floor Stand 4G
The Radius Floor Stand 4G is designed for the Radius 1 4G and Radius 3 4G. The stand uses wooden tripod legs, a single-bolt speaker attachment, and integrated cable routing that lets speaker cable exit cleanly at the base.
Key specs and options:
- Price: $395 per pair
- Compatibility: Radius 1 4G and Radius 3 4G
- Design: Wooden tripod legs
- Cable management: Internal cable routing through the stand
- Speaker attachment: Single-bolt fixing
- Dimensions: 30 11/16 x 20 1/16 x 17 7/16 inches
- Weight: 3 lb 5 oz
- Finishes: Black, White
- Sold as: Pair
Monitor Audio Radius Desk Pad 4G
The Radius Desk Pad 4G is made for Radius 1 4G and Radius 3 4G desktop placement. It uses rubber with a specified hardness for vibration isolation and adds a slight upward tilt to aim the speakers more effectively in near-field setups.
Key specs and options:
- Price: $40 per pair
- Compatibility: Radius 1 4G and Radius 3 4G
- Material: Rubber
- Purpose: Desktop stability, vibration isolation, and upward speaker tilt
- Dimensions: 15/16 x 4 1/2 x 5 7/16 inches
- Weight: 14 oz
- Finish: Black
- Sold as: Pair
Monitor Audio FIX-M Speaker Mount
The FIX-M is the more adjustable wall-mount option for Radius 1 4G and Radius 3 4G. It allows 0, 15, or 30-degree angle settings from center, and the rotating front section creates 14 possible positions.
Key specs and options:
- Price: $55 each
- Compatibility: Radius 1 4G, Radius 3 4G, Bronze 50 6G
- Angle settings: 0, 15, or 30 degrees from center
- Positioning: 14 possible positions
- Finishes: Black, White
Monitor Audio MASM Mount
The MASM Mount is a smaller wall or ceiling mount for users who want to get compact speakers off the desk or furniture. It uses a ball-joint connection for positioning and is listed as compatible with Radius 1 4G.
Key specs and options:
- Price: $35 per piece
- Compatibility: Radius 1 4G, Bronze 1, MASS Satellite, Radius 45 3G, Radius 90 3G
- Installation: Wall or ceiling
- Adjustment: Ball-joint positioning
- Finishes: Black, White, Silver
The Bottom Line
The Monitor Audio Radius Series 4G is not trying to replace a full-size hi-fi speaker system, and that is the point. Its appeal is the combination of compact cabinets, real Monitor Audio driver technology, flexible mounting options, and a cleaner design language that works in rooms where traditional speakers are either too large or too visually intrusive.
What makes Radius 4G different is the range of applications. Radius 1 4G can handle discreet surround, desktop, and multi-room duties; Radius 3 4G is the more capable compact stereo, TV, gaming, and near-field option; and Radius On-Wall 4G gives installers and home theater users a slim horizontal or vertical speaker for screen-based systems. Add the dedicated floor stands, desk pads, and wall brackets, and this becomes less of a small speaker refresh and more of a flexible compact audio system.
This is for apartment dwellers, design-conscious listeners, desktop users, custom installers, and anyone building a living room, media room, retail, hospitality, or office system where sound quality matters but big boxes are a non-starter. Bass obsessives and large-room listeners will still want a subwoofer, but for modern spaces that demand compact speakers with legitimate hi-fi intent, Radius 4G makes a lot of sense.
For more information: https://www.monitoraudio.com
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