5 out of 5
Pricing Note
Product Description
Manufacturer Part Number: RA170
The RA170 power amplifier was designed by Rolls specifically for the installation contractor. The RA170 is a single rack space unit with your choice of RCA or 1/4" unbalanced inputs.
Key Features:
Overview:
Rolls RA170 Rack Mount 70V Power Amplifier 70 Watt 1U
The RA170's 70 volt speaker outputs are provided via spring-loaded terminals - no transformer is required for speaker connection. The clean and straightforward front panel includes a power indicator LED, a volume control, and a clip LED which indicates an overload condition. The output circuitry is protected from momentary shorting and excessive load by a specially designed protective circuit. AC power adapter included. Made in the USA.
For more than two decades, those in the know have turned to Rolls for the highest quality, reliability, and value. Rolls is an innovative company specializing in domestically manufactured signal interface accessories, mixers, amplifiers, and processors for the audio professional.
Specfications: Frequency response: 70 - 20,000 Hz Power output: 70W maximum Signal-to-noise ratio: 114 dB (@ 70W) Dimensions: 19" x 1.75" x 5" Weight: 5.5 lbs.
Audio distribution systems, especially those commonly used in department stores, warehouses, restaurants, etc., require that many loudspeakers be driven from a single audio amplifier over long runs of speaker wire. The "constant voltage" or "high impedance distribution" audio systems can be complex to understand at first, however, provides many advantages. Learn how to design your own 70-volt or 25-volt loudspeaker system.
Specification:
Manuals & Resources:
The RA170 power amplifier was designed by Rolls specifically for the installation contractor. The RA170 is a single rack space unit with your choice of RCA or 1/4" unbalanced inputs.
Key Features:
- 70 watts of clean 70V power
- Simple spring-loaded output terminals
- Single rack space
- Durable construction for years of service
Overview:
Rolls RA170 Rack Mount 70V Power Amplifier 70 Watt 1U
The RA170's 70 volt speaker outputs are provided via spring-loaded terminals - no transformer is required for speaker connection. The clean and straightforward front panel includes a power indicator LED, a volume control, and a clip LED which indicates an overload condition. The output circuitry is protected from momentary shorting and excessive load by a specially designed protective circuit. AC power adapter included. Made in the USA.
For more than two decades, those in the know have turned to Rolls for the highest quality, reliability, and value. Rolls is an innovative company specializing in domestically manufactured signal interface accessories, mixers, amplifiers, and processors for the audio professional.
Specfications: Frequency response: 70 - 20,000 Hz Power output: 70W maximum Signal-to-noise ratio: 114 dB (@ 70W) Dimensions: 19" x 1.75" x 5" Weight: 5.5 lbs.
Constant Voltage (70-Volt) Audio Systems
Audio distribution systems, especially those commonly used in department stores, warehouses, restaurants, etc., require that many loudspeakers be driven from a single audio amplifier over long runs of speaker wire. The "constant voltage" or "high impedance distribution" audio systems can be complex to understand at first, however, provides many advantages. Learn how to design your own 70-volt or 25-volt loudspeaker system.
Specification:
Product Details | |
|---|---|
| Brand | Rolls |
| Model | RA170 |
| Part Number | 245-1128 |
| UPC | 675889017007 |
| Unit of Measure | Each |
| Weight | 7.8 |
Product Specifications | |
|---|---|
| Power Output (RMS @ 70V) | 51W to 100W |
| Weight Range | < 10 lbs. |
Manuals & Resources:
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By Engineer David
Date: October 20, 2025
I bought several more after evaluating the first one. I highlight recommend.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By D. R. G.
Date: August 12, 2024
heavy and does what it was made for.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Glenn W.
Date: January 16, 2024
Good, clean amp. I have it connected to 6 horns.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Dale
Date: September 14, 2022
Good, clean sound for the price. Perfect for adding remote speakers in the hallways and nursery at the church. All other amps I considered for this purpose were much more expensive.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By ecm2008
Date: May 21, 2022
Excellent product
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
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