Models: RA150, RA300 and RA500
Power your studio monitors, headphones, or home theater with Alesis Reference Amplifiers. Offered in three power categories, the RA series is quiet, efficient, and cool-operating for the demanding studio environment. The good looks and attractive prices simply add to the value of RA150, RA300, and RA500 amplifiers.
RA amplifiers provide more power and better performance at a lower cost-per-watt with crisp, clean signal. Designed for studio use, each RA amplifier incorporates advanced convection cooling for outstanding heat dissipation. The result is long, stable operation that is unaffected by heat-related complications, devoid of the noise of fan-cooling.
Whether you use RA series amplifiers to power studio monitors, headphones, or home theater speakers, you'll enjoy their reliable, consistent performance.
- Quiet, cool, efficient class AB power amplifier
- More power and better performance at a lower cost-per-watt than competitive amplifiers
- Crisp, clean signal
- Advanced convection cooling for outstanding heat dissipation
- Inputs: XLR3F, 1/4" TRS, RCA
- Switchable voltage (120/230 VAC)
- Front-panel volume controls
18.9" W x 5.63" H x 10.71" D
(480mm x 143 mm x 272 mm)
28.5lbs = 13.0Kg
Rated output, per channel
4 ohms @ 1kHz, .02% THD+N
250 watts RMS per channel
8 ohms @ 1kHz, .05% THD+N
150 watts RMS per channel
8 ohms, bridged mono mode
500 watts RMS
Signal to Noise Ratio
105dB, 22Hz-22kHz bandwidth referenced to rated output
10Hz – 70kHz +0, -3dB
60 V/μs (two channel), 120 V/μs (bridged mono)
+4dBu (1.23 V) for rated output with input control at maximum
Maximum input level
20k Ω, balanced, 10 kΩ unbalanced
All measurements done over a 20Hz-22,000Hz range with 1KHz sine wave at Full Scale, except for the dynamic range which was done with a -60dBFS 1KHz sine wave.