AR-425

The Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is a versatile and powerful audio amplifier designed for various applications, particularly for use with public address systems, intercoms, and other audio equipment. This amplifier is known for its high-quality sound and reliability, making it an excellent choice for both professional and commercial settings.

The AR-425 is a single-channel, solid-state amplifier that delivers an impressive continuous power output of 25 watts into 8 or 16 ohms and a peak power output of 50 watts. It features a foldered manual design with a convenient front-mounted control panel, allowing easy access to adjustments and settings. This amplifier operates on a 115 volts AC power supply with a frequency of 60 Hz.

The AR-425 is equipped with several protective features to ensure the longevity of the amplifier and the connected equipment. These features include overload protection, short-circuit protection, and thermal overload protection. The amplifier also comes with a built-in DC offset eliminator, which helps to eliminate any unwanted voltage that might be present in the audio signal.

The input section of the AR-425 is compatible with both microphone and line-level sources. The microphone input features a 20 dB gain control, allowing you to adjust the input level to suit your needs. The line input accepts signals with a maximum input level of 1 volt RMS and a frequency response of 20 Hz to 20 kHz.

The AR-425 also includes a transformer-isolated output, which helps to prevent any potential ground loops and ensures a clean and clear audio signal. The amplifier's output terminals are equipped with screw-type binding posts, making it easy to connect speakers or other loads.

The Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is housed in a sturdy, metal chassis with a rugged powder-coated finish. It measures 11.5 inches in width, 8 inches in depth, and 3 inches in height, making it a compact yet powerful solution for your audio amplification needs.

Overall, the Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is a high-performance, reliable, and versatile audio amplifier that offers a rich and clear sound quality for various applications. Its protective features, easy-to-use control panel, and compatibility with both microphone and line-level sources make it a valuable addition to any audio system setup.

A Comprehensive Analysis of the Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier

The Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is a popular choice for those seeking a high-quality, manual amplifier for various applications. In this analysis, we will discuss the pros and cons of investing in this amplifier to help you make an informed decision.

1. Manual operation: The AR-425 is a manual amplifier, which makes it an excellent choice for those who prefer hands-on control and do not require automatic amplification features.

2. Versatility: This amplifier can be used in various applications, such as radio, television, and industrial equipment. Its wide frequency response (25 Hz to 15 MHz) makes it suitable for a broad range of projects.

3. High power output: The AR-425 can produce up to 425 watts of output power, which is more than sufficient for most applications.

4. Rugged construction: The amplifier is built to last, with a heavy-duty aluminum chassis and robust components that can withstand the rigors of daily use.

5. Easy-to-use design: The AR-425 features a simple, easy-to-understand control layout, making it a great choice for beginners and experienced users alike.

1. Size and weight: The AR-425 is a large and heavy amplifier, weighing approximately 43 pounds (19.5 kg) and measuring 16.5 inches (42 cm) wide, 12 inches (30.5 cm) deep, and 8 inches (20.3 cm) tall. This may make it less portable than some other amplifiers.

2. Cost: The AR-425 is a high-performance amplifier, and its price reflects its capabilities. It may be more expensive than some other amplifiers on the market.

3. Limited amplification modes: The AR-425 is a manual amplifier with a fixed gain control. It does not offer automatic gain control or other advanced amplification modes, which may be a disadvantage for some users.

The Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is a robust, versatile, and high-performance amplifier suitable for various applications. Its manual operation, wide frequency response, and high power output make it an attractive choice for hobbyists and professionals alike. However, its large size, weight, and cost may be disadvantages for some users. Ultimately, the decision to invest in the AR-425 depends on your specific needs, budget, and preferences.

If you are looking for a high-performance manual amplifier with a rugged design and easy-to-use control layout, the Stromberg-Carlson AR-425 Photofact Folder Manual Amplifier is an excellent choice. Its versatility and wide frequency response make it suitable for various applications, and its high power output ensures that it can handle even the most demanding projects. However, if portability, automatic amplification modes, or a lower cost are priority factors, you may want to consider alternatives.

Details:

Please review photos for exact condition. Original SAM's photofact service manual folder covering the Stromberg-carlson model AR-425 audio amplifier. These photofact folders were produced by Howard w. Ships flat with cardboard protection.

12ax7 AF amplifier. Photofact set: 199.

specifications vintamanual:

• brand: Stromberg-carlson
• mpn: Ar-425
• part type: Manual Amplifier

offer vintamanual:

• best offers: true
• availability: in stock
• sold #: 8
• started: march 12, 2026
• prices: $4.99–$22.00
• item condition:
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  • Unspecified
  • Very Good
• options: ship-to-home
• in stock #: 5

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• category: Electronics > Audio Video > Parts Accessories > Vintage Manuals

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