size to preserve the outstanding performance capabilities of your power amplifier. Heavy gauge #14 wire is suitable for distances up to 15 feet, #12 wire for up to 30 feet. Your Authorized Cary Audio Dealer will have proper speaker cable in stock for this purpose.

Signal input connection is made via the input jack(s) on the rear of the CAD-280 SA. The interconnect cable(s) from the output of a variable output CD player or preamplifier can be any convenient length your set-up requires. The choice of a shielded, high quality interconnect cable is important. Once again, your audio dealer will suggest and have the proper cables in stock for this purpose.

3.1 Operation

Your new power amplifier is ready for operation after the speaker, interconnect cables and the vacuum tubes have been installed into their proper sockets. Refer to the tube placement sheet at the end of this manual for proper tube installation. On the amplifiers rear panel please select either the RCA or XLR input(s), according to your installation.

3.2 4 or 8 OHM Speaker Binding Posts

Select the proper speaker binding post (4 or 8 ohm) for the speaker(s) in your system. The selection should be based on your current speakers’ rated specifications and listening tests to confirm the correct connection.

3.3 Triode or Ultra-Linear Mode Switches

Select either the “Triode” 50 (100 Mono) watts or “Ultra-Linear” 100 (200 Mono) watts output setting. Make sure all six switches are set to the same operating mode position. You can switch between the operating modes while playing music at a moderate volume level. Flipping one mode switch at a time is OK.

3.4 Power ON and Standby Operate Switches

Flip the power switch to the “On” position and then flip the standby switch to the “Operate” position. Observe that all 16 vacuum tubes are lit, after a delay of 10-15 seconds. When the power tubes start to conduct, red ‘Good Health’ LED’s on the top panel will light up next to each one. This might take 30-45 seconds delay.

3.5 The Break-In Period

The tubes, capacitors and output transformers take approximately 100 hours use to settle in for peak performance. The V-12R will sound good right out of the box but it will improve within a short time. After the first 50-100 hours you will notice increased depth and tighter bass. This break-in period defies engineering theory perhaps, but we believe it is true with quality audio amplifiers.

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Cary Audio Design CAD-280SA Operation, 4 or 8 OHM Speaker Binding Posts, Triode or Ultra-Linear Mode Switches
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CAD-280SA specifications

Cary Audio Design has long been revered for its commitment to high-performance audio equipment, and the CAD-280SA is no exception. As a versatile and powerful amplifier, the CAD-280SA exemplifies the company's dedication to delivering superior sound quality.

At the core of the CAD-280SA is its robust design, featuring a stereo configuration that includes both push-pull and single-ended output stages. This dual design allows users to switch between multiple operating modes, enabling them to tailor the amplifier's performance to their unique listening preferences. With a power output of 280 watts per channel, the CAD-280SA is capable of driving a wide variety of speakers with ease, offering a dynamic listening experience that is both engaging and immersive.

One of the standout features of the CAD-280SA is its use of vacuum tubes in the signal path, which imparts a warmth and richness to the sound that is often sought after by audiophiles. This tube circuitry is complemented by solid-state technology in the output stage, which helps achieve high levels of efficiency while maintaining exceptional audio fidelity. The combination of these technologies allows the CAD-280SA to deliver clear, nuanced sound across a broad frequency range.

The CAD-280SA also incorporates advanced filtering and power supply design, ensuring that it maintains stability and performance even during intense audio passages. With a low noise floor and excellent transient response, this amplifier excels in preserving the details and dynamics of the original recording. Cary Audio has placed significant emphasis on build quality, using premium components throughout the amplifier, including custom transformers and high-grade capacitors, which contribute to its reliability and long-term performance.

In terms of connectivity, the CAD-280SA offers extensive options, making it suitable for various audio setups. It includes multiple input selections, allowing it to integrate seamlessly into different systems while accommodating a range of source components. The stylish chassis design not only contributes to its aesthetic appeal but also aids in effective heat dissipation, ensuring the amplifier remains cool during prolonged use.

In conclusion, the Cary Audio Design CAD-280SA is a powerful and versatile amplifier that combines cutting-edge technology with classic tube sound. Its impressive power output, dual operating modes, high-quality components, and thoughtful design make it an excellent choice for audiophiles seeking a robust and flexible audio solution that faithfully reproduces music with warmth and clarity.
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