Alesis RA-100 Reference Amplifier- DALAUDIO recently serviced this amplifier and has determined it is operational. The amplifier has been tested and operates as it should. Clearly, It is in excellent physical condition as the previous owner used it in a home studio. It is a very decent amplifier in this price range.
 
Cash Sale No Holds Call or Text for Pick-up - No Shipping. 
 
Interesting Features: The RA-100 has some interesting features for a studio amplifier in this price range. To compensate for source equipment that may produce transients upon power-up, there’s a 2-second mute on power-up so that attached equipment does not receive power at the same time as the RA-100. The Amp doesn’t produce power on/off thumps itself, so the mute circuit can be pre-power amp. In terms of capacity, the power supply has reserve capacity to handle percussive transients, but if someone kicks the RA-100’s plug out of the wall, you want all amplification to cease immediately. Therefore, if the amp senses any loss of power, it instantly mutes the audio.
 
Other Features: 
Dual clipping indicators inform of non-linear operation, and clipping
Output short circuit protection minimizes downtime and protect amps circuitry
Large extruded heat sinks per channel for cool operation
No ventilation fan is needed, allows quiet operation, reduced ambient noise
Extremely low noise and distortion; for quiet applications in recording studios, church installations, and museums
 
Architecture: The output stage uses full complementary-symmetry circuitry. The output devices are rated at 30 Amps of peak current, and boast a 20 MHz FT (transition frequency) for superior bandwidth. Stable operation is essential when presented with the changing load characteristics of typical speakers; the RA-100 uses several stabilization techniques to maintain consistent feedback network characteristics. Amps with lots of overdrive and saturation tend to create overshoot and ringing during the clipping process, which degrades the sound; the RA-100 has been designed so that it exhibits very little saturation, even when overloaded. As a result, it enters and exits clipping very cleanly. Clean clipping allows the RA-100 to be driven harder, which makes the overall perceived sound louder.Optimized for studio monitoring applications and moderate-power live performance setups,
 
Specifications:
Output Power: 100 watts into 4 ohms, 75 watts into 8 ohms, per side
THD: 0.05% THD @ 1kHz (8 ohms), 0.19% THD @ 1kHz (4 ohms)
Frequency Response: ±1dB 20Hz - 20kHz
Noise: 100dB below full output
Damping Factor: 200 @ 8 ohms
Input Sensitivity: 5 VRMS for full output
Input Impedance: 7 kohms, unbalanced
Input Connectors: 1/4" phone jacks
Output Connectors: 1/4" phone jacks and push clip terminals
Power Requirements: (US Domestic) 120 VAC, 500 W Max
Dimensions: (WxHxD) 19"x3.5"x8"
Weight: 14.25 lbs