Quick start guide for the Rolls RA170 70V power amplifier, covering installation, inputs, outputs, and safety warnings.
The RA170 is a 70V/70W power amplifier designed for contractors and installers to drive 70V speaker systems. It features RCA and 1/4" inputs and spring-loaded 70V speaker outputs. Installation requires mounting in a rack, connecting signal sources to inputs, and plugging into a grounded AC outlet. Safety warnings include no user serviceability and risk of electric shock.
The amplifier includes front panel controls for volume and power status, and rear panel terminals for 70V output and AC power. Specifications include a 70Hz-20kHz frequency response, 40dB gain, and 19"x1.75"x5" size. It is not designed to drive speakers directly and must be used within 70W total load limits.
| Recommended Load | 70 Volt line (70 Watts maximum) |
|---|---|
| Frequency Response | 70Hz to 20 kHz |
| Equiv. Input Noise | 100 microVolt typical, A weighted 600 Ohm input |
| S/N Ratio | 114 dB @ 70 Watts |
| Gain | 40 dB |
| Input Impedance | 47 k Ohms |
| Size | 19” x 1.75” x 5” (48 x 4.5 x 12.7) |
| Weight | 5.5 lbs (2.5 kg) |
The RA170 is rated for 70 Watts maximum at 70 Volts.
No, it is not designed to drive speakers directly — it must be used in 70V systems.
It has a frequency response of 70Hz to 20 kHz.