Phasemation MA-1500 Power Amplifier

The Phasemation MA-1500 is a monaural 300B single-ended tube power amplifier. It is designed to reproduce music with realism and emotion. As a result, it captures both the detail of the recording and the passion of the performance.

With a pure Class A design and a carefully tuned circuit, the MA-1500 delivers a natural and expressive sound. In addition, it offers stable operation and refined control. Therefore, it provides a rich and immersive listening experience for high-end systems.

Pure 300B single-ended design

The MA-1500 uses a single 300B output tube in a single-ended configuration. This design is known for its natural tone and smooth character. Because of this, it produces a warm, detailed, and highly musical sound.

Transformer-coupled circuit

The amplifier uses a transformer-coupled design with a Toshiba 6CG7 driver tube. This ensures stable signal transfer and strong control. As a result, the amplifier delivers clear sound with excellent balance and precision.

Non-feedback triode architecture

The MA-1500 uses a non-feedback circuit with triode tubes in all stages. It includes 5814A, 6CG7, and 300B tubes. Therefore, it achieves a more direct and dynamic sound with strong expression and musical flow.

High-quality transformer design

The amplifier uses Lundahl transformers for both inter-stage and output stages. These high-quality components improve signal transfer and reduce loss. In addition, they support stable performance across different signal levels.

Independent power supply design

The MA-1500 uses separate power supplies for each stage of the circuit. This reduces interference between signal paths. As a result, it delivers cleaner sound with better detail and stability.

Low-noise engineering

The amplifier is designed to reduce noise as much as possible. It uses a 5R4G rectifier tube and choke-based power supply circuits. In addition, the 300B heaters run on DC power. Therefore, the background remains quiet and the music stands out clearly.

Classic craftsmanship

The MA-1500 reflects traditional tube amplifier design with modern precision. Each unit is built with care and attention to detail. As a result, it offers both strong performance and long-term reliability.

• Monaural 300B single-ended tube power amplifier
• Pure Class A operation with natural sound
• Toshiba 6CG7 driver tube with transformer coupling
• Non-feedback triode circuit design (5814A, 6CG7, 300B)
• Lundahl inter-stage and output transformers
• Independent power supplies for each circuit stage
• 5R4G rectifier tube for low-noise power delivery
• DC-powered 300B heaters for reduced noise
• Selectable 4Ω and 8Ω speaker outputs