Adastra RS241 Slave Power Amplifier 1U 240W 100V

The Adastra RS241 is a high-efficiency 240W slave amplifier, purpose-built for integration into commercial audio systems where additional amplification power is required without onboard signal processing or preamp control. Housed in a compact 1U rackmount chassis, the RS241 is perfect for expanding distributed audio setups in retail stores, hospitality venues, educational facilities, places of worship, and office environments.

As a slave amplifier, the RS241 is designed to be driven by an external mixer or preamp. It provides a clean, uncoloured audio signal with plenty of headroom, making it ideal for driving passive loudspeakers in either foreground reinforcement or background music scenarios. The amplifier delivers a stable 240W RMS output into 4 ohms or 100V line systems, making it flexible for both low-impedance and constant-voltage installations.

Engineered for reliability, the RS241 features built-in protection circuitry including thermal overload, short circuit, and over-current protection to safeguard both the amplifier and connected speakers. Rear-mounted gain controls allow secure adjustment without interference, and balanced XLR and unbalanced RCA line inputs provide broad compatibility with professional audio gear. Outputs are provided via a Euroblock terminal, simplifying permanent installation.

With its slim profile, robust build quality, and solid performance, the RS241 is a trusted solution for scalable audio system design in commercial environments.

Features
240W RMS power output
1U rackmount design for space-efficient installation
Supports low impedance (4Ω) and 100V line speaker systems
Balanced XLR and unbalanced RCA line inputs
Screw terminal speaker output (Euroblock)
Rear-mounted level control for tamper resistance
LED indicators for power and signal status
Built-in protection: thermal, short circuit, and overload
Ideal for expanding commercial or multi-zone systems
Designed for use with external mixers and preamps

Specifications
Power Output: 240W RMS
Output Types: 100V / 8Ω / 4Ω
Inputs: 1 x Balanced XLR line input, 1 x RCA line input
Outputs: Euroblock screw terminal (100V / 4–8Ω)
Controls: Rear-mounted level trim
Indicators: Power, Signal
Protection: Thermal, short circuit, over-current
Frequency Response: Typically 50Hz – 18kHz (±3dB)
THD: < 0.5%
S/N Ratio: > 80dB
Cooling: Internal fan cooled

Power & Physical
Power Supply: 230V AC, 50Hz
Power Consumption: Approx. 300W
Dimensions (W x H x D): 482 x 44 x 270mm (1U rackmount)
Weight: Approx. 4.2kg
Finish: Black powder-coated steel chassis