LEBEN CS-600X

Second-hand, in good condition, it has two small scratches (see pictures). Supplied with its original package.

Integrated Amplifier

The Leben CS600X integrated tube amplifier is a unique product that combines a vintage look with excellent performance, ideal for those who wish to explore the world of tubes and impedances. Produced by the small and renowned Japanese brand Leben, founded in the early 1990s, this amplifier stands out for its attention to detail and build quality, making it a valuable choice for enthusiasts.

Although it lacks digital inputs or a phono stage, the CS600X features a headphone output and advanced functions such as the two-stage Bass Boost and a stereo reverse function that inverts the signal phase by 180 degrees, which can be useful for optimizing the listening experience in some systems. This amplifier is designed for those who enjoy experimentation and fine-tuning, allowing users to explore different sound configurations to best suit their preferences.

With 28W per channel, the CS600X is ideal for systems with efficient speakers, delivering subtle musical nuances with precision. The EL34 tubes are easily replaceable with other types, such as the 5881, which increase the power to 32W per channel and offer a different sound profile. Additionally, the ability to use KT66, KT77, KT88, and 6550A gives this amplifier rare flexibility, highly appreciated by audiophiles.

The CS600X’s interior features 12AU7A and 12BH7A tubes for the line stage and a 6CM3/6DN3 tube for the power supply section.

In terms of connections, the CS600X offers five single-ended inputs, a tape loop for those still recording, and a direct feed to bypass the integrated preamp circuit. It also has a knob to adjust the speaker impedance, with options for 4, 6, 8, and 16 ohms. While the impedance adjustment should begin with the recommended value for your speakers, exploring other settings can yield new sonic results.

Technical Specifications:

• Tubes equipped: (4) 6L6GC (5881) Sovtek, (optional EL34/6CA7), (4) 6CS7, (1) 6CJ3
• Output power: 32W x 2 (6L6GC) at 1KHz, 28W x 2 (EL34) at 1KHz
• Frequency response: 10Hz - 100KHz (-0.1dB)
• Distortion: 0.7% (at 10W)
• Input sensitivity: 900mV at 20W
• Output impedance: 4/6/8/16 Ohm (selectable)
• Power consumption: not specified
• Weight: 22.5 kg
• Dimensions: 450 (W) x 360 (D) x 142 (H) mm
• Accessories: Detachable AC power cable x 1