Outdoor 8 × Biamp ROCK 20 Speaker Bundle with Adastra 240D Amplifier & 100 m LSZH Cable
This comprehensive outdoor audio solution is perfect for pub gardens, terraces, and other alfresco venues. It combines rugged rock‑style Biamp ROCK 20 speakers with a powerful Adastra RM240D mixer‑amplifier, all connected via 100 m of high‑quality LSZH speaker cable. Ideal for hospitality professionals and outdoor entertainment installers.
Key Benefits
- Discreet sound delivery: ROCK 20's weatherproof rock‑shaped housing allows speakers to blend seamlessly into garden environments.
- Robust power and control: Adastra RM240D provides 240 W RMS, multiple input options (mic, line, DAB+/FM, Bluetooth, USB/SD) and zone control.
- Safe and compliant cabling: 100 m of LSZH speaker cable ensures low smoke emission and suitability for public spaces.
Design and Build Quality
Adastra RM240D: A 2U, 19″ rack‑mount unit in a durable metal chassis, weighing 7.37 kg.
Biamp ROCK 20 Speakers: Constructed from grey ABS plastic with aluminium grille, housing a 6.5″ polypropylene woofer and 1″ tweeter. Weatherproof and IP64‑rated.
Speaker Cable: LSZH 2 × 1.5 mm², designed to minimise smoke and toxic emissions, ideal for public areas.
Key Technologies & Features
- 100 V transformer taps: ROCK 20 offers 20/10/5/2.5 W settings for flexible power distribution.
- Multi‑source playback: RM240D supports DAB+/FM radio, Bluetooth 5.0, USB/SD media, with voice‑over priority.
- Zone control: Four switched 100 V zones plus one "always‑on" output, plus variable EQ and phantom power.
- Emergency mute: 24 V contacts enable muting zones except mic input for announcements.
- LSZH Cable: Low‑smoke, halogen‑free, safe for enclosed public environments.
Specifications
| Specification | Details |
|---|
| Power Source | Adastra: 230 Vac (170-264 Vac) + optional 24 Vdc; ROCK 20: Passive, via amplifier |
| Amplifier Type | Adastra RM240D, 5‑channel mixer‑amplifier |
| Output Power | 240 W RMS (100 V line or 4‑16 Ω) |
| Voltage | 100 V line (via amplifier); 24 Vdc option for RM240D |
| Impedance | ROCK 20: 8 Ω or 100 V line; RM240D: 4-16 Ω or 100 V line |
| Speakers | 8 × Biamp ROCK 20, 6.5″ woofer, 1″ tweeter, 60 W dynamic power, 20 W transformer taps |
| Frequency Response | 60 Hz - 20 kHz |
| Cable | 100 m LSZH 2 × 1.5 mm² |
| Weight & Dimensions | RM240D: 7.37 kg, 433×320×88 mm; ROCK 20: 3.9 kg, 200×260×280 mm |
Performance & User Experience
The ROCK 20 speakers deliver clear, ambient sound that blends naturally in outdoor settings, thanks to their discreet, garden‑integrated design and IP64 particle resistance. The Adastra amplifier offers powerful, reliable coverage with flexible source inputs, zone control, and announcement override--ideal for busy pub environments. LSZH cable ensures safe installation in all public settings.
Q&A
- Are the speakers weatherproof? Yes, IP64 rated; resistant to water spray and dust ingress.
- Can I play music via Bluetooth? Absolutely--Adastra supports Bluetooth 5.0, USB, SD, DAB+/FM.
- Can I extend cable length? You can run longer than 100 m, but be mindful of speaker power and cable losses.
- Can this system handle announcements? Yes--mic input 1 has priority override, and 24 V mute contacts can silence music for alerts.
- Is transformer tap required? Use 20 W taps if running low on amp power; lower taps (10/5/2.5 W) suit smaller zones.
- Is LSZH cable mandatory? It's essential for public spaces where low‑smoke, halogen‑free cabling is mandated for safety compliance.
