1. Ham, Amateur Radio Communication For Sale
  2. sku: 11802973997738651
  3. WATKINS JOHNSON S-9903E

WATKINS-JOHNSON S-9903E Speaker Channel

S-9903e Watkins-johnson Speaker 7 Channel - Tested

( Brand: Watkins-johnson ), ( Manufacturer Part Number: S-9903E ), ( Type: Speaker ), ( Supported Modes: Am, Cw, Fm, Qrp, Ssb ), ( Audio Outputs: Headphone Jack )

Review WATKINS JOHNSON Speaker Channel Tested

Watkins-Johnson S-9903E Channel Amplifier - A Powerhouse for Professional Audio Applications

The Watkins-Johnson S-9903E Channel Amplifier is a testament to the company's long-standing reputation for delivering high-quality, reliable, and powerful audio solutions. This two-channel amplifier is designed to cater to the demanding needs of professional audio applications, offering exceptional performance and versatility.

The S-9903E Channel Amplifier boasts a continuous power output of 300 watts per channel at 4 ohms, ensuring that it can effortlessly drive even the most demanding loudspeakers. It employs a Class AB topology, which provides an optimal balance between efficiency, linearity, and heat dissipation, ensuring consistent and stable performance under heavy loads.

Each channel of the S-9903E is equipped with a separate gain control knob, allowing for precise level adjustment. An XLR input and a 1/4" TRS input are provided on each channel, offering flexibility in terms of source connections. A high-pass filter is also included on each channel, helping to reduce low-frequency feedback and allowing for better bass management.

The S-9903E Channel Amplifier features a rugged steel chassis and a robust power supply, ensuring that it can withstand the rigors of regular use in live sound, studio, and installed sound applications. The front panel is equipped with LED indicators for power, clip, and protection, providing real-time feedback on the amplifier's status.

In summary, the Watkins-Johnson S-9903E Channel Amplifier is a versatile and powerful tool for any professional audio setup. Its robust construction, flexible connectivity options, and exceptional power output make it an ideal choice for a wide range of applications, from live sound reinforcement to studio recording and installed sound systems. With the S-9903E, you can trust that your audio will be delivered with clarity, power, and precision.

The Watkins-Johnson S-9903E is a high-power amplifier designed for professional applications. Here are some pros and cons to consider before making a purchase:

Pros:

1. High Power Output: The S-9903E offers a power output of 9 kW per channel, making it suitable for driving high-impedance speakers in large venues or outdoor events.

2. Reliability: Watkins-Johnson is known for manufacturing high-quality, durable products that can withstand harsh conditions.

3. Versatility: The amplifier can be used in various applications, including sound reinforcement, public address systems, and audio monitoring.

4. High-Frequency Response: The S-9903E has a high-frequency response of up to 50 kHz, ensuring accurate reproduction of high-frequency sounds.

5. Protection Features: The amplifier includes protection features such as over-current, over-voltage, and thermal protection to prevent damage.

Cons:

1. Price: The S-9903E is a high-end amplifier and may be too expensive for some users or smaller-scale applications.

2. Size and Weight: The amplifier is large and heavy, making it difficult to transport and requiring a sturdy mounting solution.

3. Complex Setup: The S-9903E may require professional installation and setup due to its advanced features and complex control panel.

4. Limited Input Options: The amplifier only has XLR inputs, which may not be suitable for all sources.

Conclusion:

The Watkins-Johnson S-9903E is a powerful and reliable amplifier perfect for professional sound reinforcement applications. However, its high price, size, weight, and complex setup may make it impractical for some users or smaller-scale applications. If you have the budget and need a high-power amplifier for large-scale events or outdoor applications, the S-9903E is a great choice. If you're looking for a more affordable or portable option, there are other amplifiers on the market that may better suit your needs.

Details:

WATKINS-JOHNSON SPEAKER S-9903E 7 channel - TESTED In good/used condition tested and working. Shipping quoted for US48 ONLY. AC power cord has some insulation deterioration and should be replaced. Shipping method may vary.

This item is from the estate of my sisters father-in-law.

specifications hamamateuradio:

  • brand: Watkins-johnson
  • mpn: S-9903e
  • type: Speaker
  • supported modes: Am, Cw, Fm, Qrp, Ssb
  • audio outputs: Headphone Jack

returns hamamateuradio:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer
  • method: Money back

offer hamamateuradio:

  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • availability: In Stock
  • started: March 28, 2025

seller hamamateuradio:

  • rating: 100.0%
  • # reviews: 2740
  • city: Largo, Florida

general hamamateuradio:

  • Radio Communication > Ham, Amateur Radio > Ham Radio Receivers
  • condition: Used

shipping hamamateuradio:

  • service: USPS Ground Advantage
  • type: Fixed
  • transit: 5-12 Days
  • carrier: USPS
  • cost: $19.95
  • class: Standard

payments hamamateuradio:

  • credit card: Diners-club
  • wallet: Apple-pay
  • other
type: speaker, supported modes: am, cw, fm, qrp, ssb, audio outputs: headphone jack,
category: electronics > radio communication > ham, amateur radio > ham radio receivers, sku: 11802973997738651,
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