Samson

Samson SA120A Servo 120-Watt Stereo Power Amplifier

3.6 (40 reviews)

Experience Clear, Reliable Audio with the Samson Servo 120a AmplifierThe Samson Servo 120a Power Amplifier is engineered to deliver reference-class audio performance in a compact, single rackspace design. Perfect for nearfield monitors, public address systems, and home theater applications, it pr...

$299.99*
In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Experience Clear, Reliable Audio with the Samson Servo 120a Amplifier

The Samson Servo 120a Power Amplifier is engineered to deliver reference-class audio performance in a compact, single rackspace design. Perfect for nearfield monitors, public address systems, and home theater applications, it provides exceptional clarity and reliability with quiet, fan-less operation.

  • Power Output: 60 watts per channel at 4 ohms stereo, 120 watts at 8 ohms (bridged mono)
  • Inputs: 1/4-inch balanced phone jack and RCA inputs
  • Metering: 10-segment, 3-color LED meters
  • Cooling: Convection-cooled design (fan-less)
  • Design: Bipolar design and toroidal transformer power supply
  • Weight: 16.7 pounds
  • Dimensions: 21.5 x 14 x 4 inches

Key Features

60 watts per side at 4 ohms stereo, 120 watts at 8 ohms (bridged mono)

1/4-inch balanced phone jack and RCA inputs

10-segment, 3-color LED meters

Convection-cooled design

Bi-polar design and toroidal transformer power supply

Specifications

Power Output (Stereo)
60 watts per side at 4 ohms
Power Output (Bridged Mono)
120 watts at 8 ohms
Inputs
1/4-inch balanced phone jack, RCA
Meters
10-segment, 3-color LED
Cooling
Convection-cooled
Design Type
Bi-polar
Power Supply
Toroidal transformer

Pros & Cons

👍 Pros

  • Delivers a substantial 60 watts per side in stereo at 4 ohms, providing ample power for various audio setups.
  • Capable of bridging to 120 watts at 8 ohms in mono, offering flexibility for different speaker configurations.
  • Equipped with both 1/4-inch balanced phone jack and RCA inputs, allowing for broad compatibility with audio sources.
  • Features 10-segment, 3-color LED meters for clear and immediate visual monitoring of signal levels.
  • Benefits from a convection-cooled design, which promotes silent operation by eliminating the need for cooling fans.
  • Incorporates a bi-polar design and a toroidal transformer power supply, contributing to stable and efficient audio performance.

👎 Cons

  • The 120-watt bridged mono output might not be sufficient for very large venues or high-power applications requiring more headroom.
  • A convection-cooled design, while silent, can lead to increased operating temperatures compared to actively cooled amplifiers under heavy load.
  • The included input types are standard, but the absence of XLR inputs may require adapters for some professional setups.
  • The 10-segment LED meters provide a visual indication but do not offer the precise numerical feedback of a digital display.
  • Specific THD, frequency response, or signal-to-noise ratio figures are not provided, making direct performance comparisons challenging.

Frequently Asked Questions

The Samson SA120A Servo amplifier delivers 60 watts per side when operating in stereo at 4 ohms.
Yes, it can be bridged to provide 120 watts at 8 ohms in mono configuration.
It features both 1/4-inch balanced phone jack inputs and RCA inputs, offering versatile connectivity options.
The amplifier includes 10-segment, 3-color LED meters that provide a clear visual indication of your signal levels.
No, it features a convection-cooled design, which means it operates without a fan for silent performance.
It utilizes a toroidal transformer power supply, which is known for its efficiency and low noise characteristics.