Yamamoto Sound Craft New A -08SS "45" single stereo amplifier

The model number is a model change version that has undergone major evolution from the old .The superiority of sound quality, which is characteristic of the old type, has also improved further in the new type A-08SS. Although the A-08S was small, it boasted a sound quality comparable to the finest 300B amplifier. This excellent characteristic is healthy even in new A-08SS. Designed to bring out the best sound quality in combination with high-efficiency speakers. The basic circuit configuration is the same as Western Electric's 717A driver tube and the output stage of 45 vacuum tubes, but the most characteristic of the A-08SS is that it reviewed all used parts and improved the quality of resistors and capacitors to the extreme.

In the A-08SSIt uses a power transformer using a cut core with excellent regulation inherited from the old type, an output transformer using a 100 μ thick Hi-B cut core, and a cut core for chalk coil. Especially for the output transformer, fluoropolymer material with low dielectric factor is used as insulation paper of the coil to measure the sound quality improvement.

The chassis uses a wood-based composite material called laminated reinforced wood, which is heated at high pressure by staining phenolic resin with excellent insulation properties on a thin plate of cherry wood. Insulation properties have the same properties as phenolic resins, and strength is the strength of phenolic resins. Externally, it looks the same as wood, but its characteristics are much better. chassis made of insulatorsIt prevents the influence of eddy current inside the amplifier, and the high-strength chassis reduces the resonance and noise of vacuum tubes and parts, contributing to high sound quality.

The vacuum tube socket uses a high-quality in-house socket that combines fluoropolymer materials with phosphorus bronze socket pins with excellent insulation performance.

The best feature of the A-08SS is that we reviewed all the parts used and improved the quality of resistors and capacitors to the limit. The circuit part of the amplifier that used chemical capacitors was changed to a high-quality film condenser with ebony case. With this change, the sound quality became more clear and rich.

In addition, the resistor has been greatly upgraded. In the old model, wound resistance and metal film resistor were used, but in the new model, the thin film resistor with high precision and high sound quality of surface mount type was changed.A surface-mounted thin film resistance from Vishay, USA, which has excellent characteristics for all major resistors, has been adopted to improve sound quality.The accuracy of the resistors used in regular vacuum tube amplifiers is 1% to 5%, but Vishay's thin film resistors have a resistance error of 0.1% and a temperature coefficient of 5PPM to 10PPM. High QualityThe resistor enables low noise of the amplifier, and the residual noise due to the hearing feeling is greatly reduced A-08SS the sound quality is realized, providing a more pure and detailed sound.

There is no major change in the basic design of the entire circuit, but a stylish flange is attached to the meter part so that it is distinguished from the old in appearance. If the current value is about 60% ~ 70% of the initial value, it is time to replace the output tube. The condition of the output tube is visible and you can see the life of the vacuum tube with your eyes.

The input terminal adopts chrome copper sharpening terminal for external conductor, and the inner pin adopts a round pin terminal for neighboring bronze shaving, and the finest pin jack using Teflon as insulation material. The output terminal is pure copper shaving gold plated with a large terminal with Teflon insulation. It is also possible to connect a super-thick speaker cable with a thickness of 8mm. The speaker terminal is only the 8Ω output terminal, 4Ω there is nothing wrong with using the 16Ω speaker. However, the maximum output will be lowered in either case. If it is the maximum output of the 8W, it will be the 4-6W output.

The legs are made of African ebony wood which has a reputation for its beautiful sound. This African ebony material is actually used in oboe and clarinet materials, and the sound is beautiful, and it is highly regarded as the material of the company's setting base. The legs are fixed directly to the chassis made of Comprit to gain strength and good resonance, and support the overall weight accurately.

A-08SS is the ideal one for music lovers and audio fans. The exceptional sound quality inherited from the old A- -08S and the newly added improvements combine to provide the ultimate listening experience. Experience valuable vintage sound with the new A- .