Monitor Audio Radius 1 4G Compact Speakers - Pair | RAD4G1
Monitor Audio Radius 1 4G Compact Speakers - Pair | RAD4G1
Available to order — ships from incoming stock
Typically ships in 4–8 Business Days (Western Canada) · 2–5 Business Days (Eastern Canada)
SKU:RAD4G1B
MPN: RAD4G1B
Monitor Audio Radius 1 4G is an ultra-compact passive 2-way loudspeaker designed for projects where physical footprint matters but true hi-fi performance is still expected. Sold as a manufacturer-defined pair, it is suited to compact stereo systems, surround channels, desktop listening, discreet multi-room audio and design-sensitive residential or light-commercial spaces.
Each speaker combines a 4-inch RST III C-CAM bass-mid driver with a 19 mm C-CAM Gold Dome tweeter. The sealed cabinet keeps the enclosure compact and supports flexible placement, while Monitor Audio publishes a 100 Hz–35 kHz in-room response, 82 dB sensitivity and 104 dB maximum peak SPL.
Radius 1 4G at a glance
- Sold as: Pair — two speakers per sell unit.
- System: Passive, wired, 2-way compact loudspeaker.
- Drivers: 1 × 4 in RST III C-CAM bass-mid driver + 1 × 19 mm C-CAM Gold Dome tweeter per speaker.
- Frequency response: 100 Hz–35 kHz, in-room (-6 dB).
- Nominal / minimum impedance: 8 ohms / 3.8 ohms at 950 Hz.
- Continuous power handling: 50 W.
- Maximum peak SPL: 104 dB.
- Bass alignment: Sealed.
- Crossover: 3.2 kHz.
- Finishes: High Gloss Black and Satin White.
- Warranty: 5 years.
Compact acoustic design
Radius 1 4G is built around Monitor Audio's current RST III C-CAM driver technology and a fully vented C-CAM Gold Dome tweeter. The combination is intended to preserve clarity and controlled dispersion from a cabinet measuring only 135 × 135 × 156 mm. Because Radius 1 uses a sealed alignment, there is no reflex-port tuning requirement to manage during placement.
Amplifier matching
Monitor Audio rates Radius 1 4G at 8 ohms nominal with a published minimum of 3.8 ohms at 950 Hz. Recommended amplifier power is 25–50 W RMS into 8 ohms or 50–100 W RMS into 4 ohms. This makes the speaker straightforward to specify with appropriately sized stereo amplifiers, AV receivers and distributed-audio amplification.
Flexible placement and mounting
Radius 1 4G can be used on furniture, on the dedicated Radius Desk Pad 4G, on the Radius Floor Stand 4G, or wall mounted. Current Monitor Audio compatibility includes both the FIX-M and MASM speaker mounts.
For systems that need deeper bass, a subwoofer such as the Monitor Audio Vestra W10 can be added. Monitor Audio's Radius support guidance suggests 140 Hz as a starting crossover point for Radius 1 4G when integrating a subwoofer; final settings should be adjusted for the room and system.
Technical specifications
| System format | 2-way passive loudspeaker |
|---|---|
| Frequency response | 100 Hz–35 kHz, in-room (-6 dB) |
| Sensitivity | 82 dB, 2.83 Vrms @ 1 m, free-field |
| Nominal impedance | 8 ohms |
| Minimum impedance | 3.8 ohms @ 950 Hz |
| Maximum peak SPL | 104 dB, AES75 Z-weighted |
| Continuous power handling | 50 W, CTA 426-B |
| Recommended amplifier power | 50–100 W into 4 ohms / 25–50 W into 8 ohms |
| Bass alignment | Sealed |
| Crossover frequency | 3.2 kHz |
| Dimensions (H × W × D) | 135 × 135 × 156 mm |
| Weight | 1.8 kg each |
Finish, SKU and GTIN
| Finish | SKU / MPN | GTIN-13 |
|---|---|---|
| High Gloss Black | RAD4G1B | 5061070620722 |
| Satin White | RAD4G1SW | 5061070620739 |
Dealer planning note: Radius 1 4G is treated as a special-order / non-stock product unless availability is confirmed otherwise. The pair is the manufacturer sell unit; it is not a retailer-created multipack.
