ACOUSTIC IMAGE 650BA Contra Amplifier S4

( Brand: Acoustic Image ), ( Manufacturer Part Number: 650BA ), ( Model: CONTRA S4 650BA ), ( Type: Acoustic Guitar ), ( Set Includes: Amplifier )

Review ACOUSTIC IMAGE Contra S4 Amplifier

Introducing the Acoustic 650BA Contra S4 Amplifier, a high-performance and versatile audio solution designed to deliver crystal-clear and powerful sound for both professional and home applications.

The Contra S4 Amplifier is a Class A/B design, which means it offers the best of both worlds: the efficiency and power handling capability of Class B amplifiers, combined with the sonic purity and musicality of Class A amplifiers. This design results in an amplifier that delivers rich, detailed sound with minimal distortion, making it an excellent choice for acoustic instruments and vocal performances.

The Contra S4 Amplifier is rated at 650 watts per channel into 8 ohms, making it capable of driving even the most demanding speakers with ease. It features a fully balanced design, with separate input and output transformers for each channel, ensuring that the signal remains pure and free from interference.

This amplifier also boasts several advanced features to make it a versatile and convenient choice for a wide range of applications. It includes a variable bass and treble control, allowing you to fine-tune the sound to your specific needs. The Contra S4 also features a selectable input impedance switch, which allows it to be used with both active and passive speakers.

The Contra S4 Amplifier is constructed from high-quality components, including a heavy-duty transformer and custom-designed output transistors. It is housed in a rugged and durable steel chassis, which not only looks great but also provides excellent shielding against electromagnetic interference.

The Contra S4 Amplifier is designed and manufactured in the USA, and it comes with a comprehensive 5-year warranty, ensuring that you can enjoy peace of mind and excellent performance for years to come. Whether you're a professional musician or a music enthusiast looking to enhance your home audio system, the Acoustic 650BA Contra S4 Amplifier is an excellent choice that delivers powerful, pure, and detailed sound.

The Acoustic 650BA Contra S4 amplifier is a popular choice for musicians looking for a high-quality tube amplifier. Here are some pros and cons that might help you make an informed decision:

1. Tube Technology: The Acoustic 650BA Contra S4 uses tube technology, which is known for producing warm and rich tone. Tube amplifiers also have a more natural response, making them ideal for acoustic guitars.

2. Versatility: This amplifier can be used with both acoustic and electric guitars, making it a versatile option for musicians who play both types of instruments.

3. Powerful: With a power rating of 65 watts, the Acoustic 650BA Contra S4 is powerful enough to handle large venues or gigs.

4. Built-in Preamp: The amplifier comes with a built-in preamp, which allows for better control over the sound and can help reduce the need for additional equipment.

5. Durable: The Acoustic 650BA Contra S4 is built with high-quality components and is designed to withstand the rigors of regular use.

1. Size and Weight: The amplifier is quite large and heavy, making it difficult to transport, especially for solo performers.

2. Price: The Acoustic 650BA Contra S4 is a premium amplifier, and its price tag may be a barrier for some musicians.

3. Tube Replacement: Tubes need to be replaced periodically, which can add to the maintenance and cost of the amplifier.

4. Noisy: Some users have reported that the amplifier can be quite noisy, especially when the volume is turned up.

The Acoustic 650BA Contra S4 amplifier offers a rich and warm tone, versatility, and power, making it an excellent choice for musicians who prioritize sound quality. However, its size and weight, price, and potential noise issues may be drawbacks for some. Ultimately, the decision to buy this amplifier depends on your specific needs and budget.

If you're looking for a high-quality tube amplifier that can handle large venues and can be used with both acoustic and electric guitars, the Acoustic 650BA Contra S4 is an excellent option. However, if you're on a tight budget or prefer a more portable and quieter amplifier, you may want to consider other options.

Details:

This was fully tested and works great. The is also in very nice condition as shown within the photos.

specifications acoustguitmusi:

• brand: Acoustic Image
• mpn: 650ba
• model: Contra S4 650ba
• type: Acoustic Guitar
• set includes: Amplifier

general acoustguitmusi:

• Musical Instruments Gear > Guitars Basses > Acoustic Guitars
• condition: Used

seller acoustguitmusi:

• city: Cary, Illinois
• # reviews: 2020
• rating: 100.0%

shipping acoustguitmusi:

• carrier: USPS
• cost: $39.99
• transit: 3-8 Days
• type: Fixed
• service: USPS Ground Advantage
• class: Standard

offer acoustguitmusi:

• started: January 26, 2026
• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock

payments acoustguitmusi:

• other
• credit card: Mastercard
• wallet: Google-pay

returns acoustguitmusi:

• policy: No Returns

Acoustic Image 650BA Is Similar To:

• 3000802 Acus Sound Engineering Oneforstrings Acoustic Guitar Amplifier Black 819471014696 (32.6% similar) Also, the packaging may show significant signs of handling or wear. Quality all merchandise is tested prior to listing unless it sealed in the factory package. Color: black please see photos for what is included. Please prior to buying buying if you want purchase and don't meet this requirement. We ...(November 2nd, 2018)