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Alesis

RA 500

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Power AmplifiersModels: RA150, RA300 and RA500Power 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...

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Power Amplifiers
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

Size 
18.9" W x 5.63" H x 10.71" D
(480mm x 143 mm x 272 mm) 

Rack Units

3RU Height 

Weight

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 

Frequency Response 
10Hz – 70kHz +0, -3dB 

Damping Factor 
200 

Slew Rate 
60 V/μs (two channel), 120 V/μs (bridged mono) 

Input Sensitivity 
+4dBu (1.23 V) for rated output with input control at maximum 

Maximum input level 
+26 dBu 

Input impedance 
20k Ω, balanced, 10 kΩ unbalanced 

Crosstalk 

85dB, 1kHz 

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.
Manuals & DocumentationSizeType
RA500 - Product Overview 120 KB pdf
RA500 - Reference Manual 929 KB pdf

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