Radius 1 4G is ideal for discreet AV, surround or multi-room sound systems. With versatile mounting options, a wall, desktop or floor stand and the option of adding a subwoofer, Radius 1 4G can deliver full-range, high-fidelity sound from an ultra-compact form. The newly designed 4-inch C-CAM driver with RST III geometry, partnered with a 19 mm C-CAM Gold Dome tweeter, delivers precise, lifelike sound from this cleverly engineered micro-speaker.

Features at a glance:
1 x 4-inch C-CAM Driver | RST II Cone | RST III Bass Driver | 19 mm C-CAM Gold Dome Tweeter | New Crossover Design | Through-bolt Driver Bracing | HiVe II Ports | Finishes in Satin White & High Gloss Black

Big Sound, Minimal Footprint

Compact yet remarkably capable, the Radius 1 4G delivers genuine hi-fi performance from an ultra-small form factor.

At its heart, a newly designed 4-inch C-CAM RST III bass/mid driver pairs with a fully vented 19 mm C-CAM Gold Dome Tweeter to produce precise, lifelike sound with exceptional clarity, controlled dispersion and low distortion – hallmarks of Monitor Audio's metal-driver expertise.

Engineered for versatility, Radius 1 4G suits discreet AV, surround and multi-room installations equally, with mounting options for wall, desktop, or floor stands via compatible optional accessories. Add a Monitor Audio subwoofer for truly full-range performance. Whether enhancing a design-led home, boutique commercial space or immersive home cinema, Radius 1 4G achieves the ideal balance of acoustic transparency and understated elegance.

System Format: 2-Way

Frequency Response, In-Room (-6dB): 100 Hz — 35 kHz

Sensitivity (2.83 Vrms @ 1m, Free-Field)​​: 82 dB

Sensitivity (2.83 Vrms @ 1m, Installed): N/A

Nominal Impedance: 8 Ohms

Minimum Impedance (20 Hz to 20 kHz)​​: 3.8 Ohms @ 950Hz

Maximum Peak SPL (AES75, Z-weighted): 104 dB

Continuous Power Handling (CTA 426-B): 50 W

Recommended Amplifier Power (RMS, Music Signal):

50 - 100 W into 4 Ohms

25 - 50 W into 8 Ohms

Bass Alignment: Sealed

Port Tuning Frequency: N/A

Crossover Frequency: LF/HF: 3.2 kHz

Drive Unit Complement:

1x 4" RST III bass-mid driver

1x 19 mm C-CAM Gold Dome tweeter

Finishes:

High Gloss Black

Satin White

External Dimensions with all accessories fitted (H x W x D):

135 x 135 x 156mm (55/16 x 55/16 x 61/8")

Weight (each): 1.8 kg (3 lb 15oz)

Sold As: Pair

Warranty: 5 years

Compatible MAG Brackets: MASM, FIX-M 

Monitor Audio by Monitor Audio

Monitor Audio Radius 1 4G Compact Speaker

Pair
Regular price
$719.00
Sale price
$719.00
Regular price
$799.00
Investor focus research & development value proposition graphical user interface investor. Startup business plan user experience.
Investor focus research & development value proposition graphical user interface investor. Startup business plan user experience.

Monitor Audio Radius 1 4G

Radius 1 4G is ideal for discreet AV, surround or multi-room sound systems. With versatile mounting options, a wall, desktop or floor stand and the option of adding a subwoofer, Radius 1 4G can deliver full-range, high-fidelity sound from an ultra-compact form. The newly designed 4-inch C-CAM driver with RST III geometry, partnered with a 19 mm C-CAM Gold Dome tweeter, delivers precise, lifelike sound from this cleverly engineered micro-speaker.



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Monitor Audio

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