The Monitor Audio Radius R90HT1 is a compact 5.1 home cinema speaker package from the Radius series, sitting alongside the larger R90HT12 (5.1.2) configuration in Monitor Audio's home theatre lineup. The package combines four Radius 90 satellite speakers, a Radius 200 centre channel, and a Radius 390 subwoofer into a system designed to deliver immersive surround sound without dominating a room.
Radius 90 Satellite Speakers
The four Radius 90 speakers serve as front left/right and rear surround channels. Each features a 4-inch (100mm) C-CAM (Ceramic-coated Aluminium/Magnesium) cone bass/mid driver paired with a 1-inch (25mm) C-CAM Gold Dome tweeter. The C-CAM construction delivers a rigid, lightweight diaphragm that extends high-frequency response to 35 kHz. A rear-firing HiVe II reflex port helps maximise low-end extension from the compact enclosure, achieving a frequency response of 80 Hz – 35 kHz. Sensitivity is rated at 83 dB (1W @ 1m) with a nominal impedance of 8 ohms. Each Radius 90 measures just 198 × 125 × 140 mm and weighs 2.1 kg, making wall mounting via the single-point fixing (1/4-inch × 20 TPI) a practical option.
Radius 200 Centre Channel
The Radius 200 handles dialogue duties with a two-way design featuring twin 4-inch (100mm) C-CAM cone drivers flanking a central 1-inch (25mm) C-CAM Gold Dome tweeter. This dual-driver arrangement improves sensitivity to 86 dB (1W @ 1m) and extends the lower frequency reach to 60 Hz. The centre channel has a nominal impedance of 6 ohms and handles up to 100 W RMS (150 W system). It incorporates the same HiVe II port technology as the satellites. Dimensions are 125 × 330 × 140 mm and it weighs 3.6 kg.
Radius 390 Subwoofer
The Radius 390 subwoofer completes the system with a 10-inch long-throw C-CAM bass driver backed by an auxiliary bass radiator (ABR) on the opposite face. Driven by a 220 W amplifier housed in a sealed aluminium enclosure, the Radius 390 offers three preset EQ modes — Music, Movie, and Impact — to tailor bass response to different content types. The aluminium construction is both light and rigid, contributing to fast transient response.
What the Press Says
- “This package sounds wonderfully cohesive and entertaining – it’s up there with the very best at this price.” — What Hi-Fi? ★★★★★
- What Hi-Fi? Awards 2014 winner — Best Style Package £1,400–£1,800
| Package Configuration | 5.1 (4x Radius 90 satellites, 1x Radius 200 centre, 1x Radius 390 subwoofer) |
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| Radius 90 Driver Complement | 1 × 4″ (100mm) C-CAM cone bass/mid, 1 × 1″ (25mm) C-CAM Gold Dome tweeter |
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| Radius 90 Frequency Response | 80 Hz – 35 kHz |
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| Radius 90 Sensitivity | 83 dB (1W @ 1m) |
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| Radius 90 Impedance | 8 ohms nominal |
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| Radius 90 Power Handling | 75 W RMS (100 W system) |
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| Radius 90 Dimensions (H × W × D) | 198 × 125 × 140 mm |
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| Radius 90 Weight | 2.1 kg each |
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| Radius 200 Driver Complement | 2 × 4″ (100mm) C-CAM cone bass/mid, 1 × 1″ (25mm) C-CAM Gold Dome tweeter |
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| Radius 200 Frequency Response | 60 Hz – 35 kHz |
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| Radius 200 Sensitivity | 86 dB (1W @ 1m) |
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| Radius 200 Impedance | 6 ohms nominal |
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| Radius 200 Power Handling | 100 W RMS (150 W system) |
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| Radius 200 Dimensions (H × W × D) | 125 × 330 × 140 mm |
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| Radius 200 Weight | 3.6 kg |
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| Radius 390 Driver | 10″ long-throw C-CAM with ABR |
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| Radius 390 Amplifier Power | 220 W |
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| Radius 390 EQ Modes | Music, Movie, Impact |
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| Finishes Available | High Gloss Black, Satin White, Walnut |
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| Also Available As | Gloss Black, Walnut |
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