AUDIO NOTE INTERSTAGE MONO BLOCK 2A3

Secod-hand, in good condition, without scratches. Supplied with their original package.

Pair of Monophonic Power Amplifiers

The Interstage Monoblock represents the highest expression of Single Ended amplification with 300B tubes, designed for the most demanding audiophiles seeking a truly top-tier sonic experience. This monophonic power amplifier takes the SET philosophy to a new level of refinement and control. Its distinctive feature lies in the use of a 1:1 interstage transformer, which replaces the traditional capacitor coupling in the 300B driver stage. The result is extraordinary midrange control, an authoritative soundstage presence, and a surprisingly deep low-end extension that captivates from the very first listen.

Inspired by the approach used in the legendary Audio Note On Gaku 211 amplifiers, this design employs one interstage transformer per channel, which directly handles the driver function without the need for an additional tube stage. The result is a level of clarity and realism rarely matched by other amplifiers, with nuanced musicality and an exceptional sense of engagement.

The mechanical construction is meticulously crafted, featuring a 3 mm thick aluminum chassis with black powder coating, solid copper front plate inserts, stainless steel metric hardware, and top-quality components. The amplifier is entirely hand-wired, with a power supply and driver circuitry enhanced by the latest Mundorf 4-pole Mlytic capacitors.

This project represents the pinnacle of audio craftsmanship, conceived for those who wish to experience music reproduction as something intimate, authentic, and truly one of a kind.

Technical Specifications:

• Power: 18 Watts Class A (Parallel)
• Output Tubes: 2 x 300B or 4 x 300B
• Gain Stage Tube: 6SH7
• Rectifier Tube: 5U4GB
• Front Plate: Solid Copper
• Inputs: 1
• Outputs: 1 stereo pair; 4, 8, 16 ohms
• Recommended Speakers: Minimum 88 dB
• Width: 24.5 cm
• Height: 20.5 cm
• Depth: 50 cm
• Weight: 48 kg
• Chassis: 3 mm aluminum with black powder coating