6S4S

6S4S Tube Amplifier –  SE Class A Stereo Amplifier

The 6S4S is a top-tier SE (Single-Ended) Class A stereo tube amplifier, renowned for its exceptional sound quality and unique craftsmanship, handcrafted in Latvia. Built using point-to-point wiring technology, it ensures precise electrical connections and minimal interference. This amplifier is 100% handmade, making it not just an audio device but an exclusive piece of art, crafted as a one-of-a-kind item.

Construction:

Chassis:

• Made from solid oak and mahogany, combining the natural beauty of wood with the elegance of metal details to create a classic and durable design.

Tubes:

• Power Stage:

  • Power stage: two 6C4C tubes – renowned for their musical character, revealing music with both softness and power at the same time. The 6C4C is a directly heated triode (DHT) developed and manufactured during the Soviet era. It was designed as an analogue of the Western 2A3 tube, one of the most iconic audio triodes. These tubes were produced in the USSR from the mid-20th century (approximately from the 1950s) until the 1980s, mainly in factories in Moscow and other Soviet republics. Today, the 6C4C is highly regarded among audiophiles worldwide as one of the classic tubes for building high-quality audio amplifiers (Comparison of Power Triodes AD1, Ed, and 6S4S). This tube is known for its warm, rich and natural sound, making it a popular choice for Single-Ended (SE) Class A amplifiers. The sound of the 6C4C is soft, musical and detailed, with excellent midrange reproduction and a low noise floor.

  • Preamplifier stage: two 6Ж11П tubes – high-frequency pentodes developed in the Soviet Union for radio-electronic applications. They were manufactured mainly from the 1960s to the 1980s and were intended for wide-band high-frequency voltage amplification, ensuring high signal accuracy. The 6Ж11П offers a wider frequency range compared to some lower-frequency tubes and lower microphonic noise than larger audio tubes.

Technical Specifications:

• Output Power: 2 x 3 W, suitable for small to medium-sized rooms with high-sensitivity speakers.
• Dimensions: Width 55 cm, Height 15 cm, Depth 30 cm.
• Weight: 16 kg, ensuring stability and reducing vibrations.

Sound Quality:

The SE Class A design minimizes harmonic distortion, allowing music to be reproduced with high dynamics and the warmth characteristic of tube amplifiers. The sound is rich, natural, and detailed, making it ideal for fans of classical and acoustic music.

Overall Impression:

The 6S4S amplifier is perfect for those who appreciate excellent sound quality, premium materials, and craftsmanship. This device is not just an audio system but also an aesthetic element that will draw attention in any room.

Key Specifications:

• Technology: SE Class A stereo amplifier
• Assembly Method: Point-to-point wiring
• Materials: Solid oak, mahogany, and plywood
• Tubes: 2 x 6C4C; 2 x 6Ж11П
• Output Power: 2 x 3 W
• Dimensions (Width x Height x Depth): 55 x 15 x 30 cm
• Weight: 16 kg