SOULNOTE A-1 Integrated Amplifier 10th Anniversary Platinum Silver MADE IN JAPAN

■Completely non-feedback discrete circuit

In order to take advantage of the characteristics of SOULNOTE's original completely non-feedback discrete circuit, we thoroughly reconsidered every detail, such as star wiring of the ground plane, unification of the local non-feedback regulator, adoption of a direct coupling route, and best tuning of the drive current, to further promote dynamism, speed, and wide range.

■High-speed discrete non-feedback power supply

In addition to adopting a newly developed bifilar-wound large-capacity toroidal transformer with independent plus and minus windings, we have thoroughly refined the speed of the power line in every detail, such as low impedance by multiple parallel connections of high-voltage and small-capacity filter capacitors, adoption of fast recovery rectifier diodes, and shortest current loop by placing the rectifier diodes close to the power transformer. The S/N ratio and sense of speed have been further improved.

■Contactless wiring

We have eliminated all connectors in the signal system and achieved a configuration that eliminates contacts caused by connectors. In addition, by combining printed circuit boards in a three-dimensional manner, we have achieved wiring that focuses on low impedance of the power supply line and star wiring. These features improve the S/N ratio and eliminate the worry of poor contact due to deterioration over time.

■Output transistor pairing

The output transistors are low Cob, high Ft, and highly accurate complement transistors.

Furthermore, transistors with uniform characteristics are selected and paired.

This improves the focus and three-dimensionality of the sound image.

■Relay switching type balanced attenuator

Instead of the conventional rotary slider volume or electronic volume,

a newly developed relay attenuator method is used in the balanced type for volume adjustment.

Transparency is dramatically improved and the sound image emerges three-dimensionally.

In addition, the quality at low volume is also significantly improved, and there is no need to worry about gang errors.

■Direct mechanical earth construction

By mounting the spike pin directly under the center of gravity of the transformer,

harmful vibrations from the transformer are directly eliminated from the housing without interfering with the entire housing.

This makes it possible to achieve both lively musical expression and high S/N ratio.

■Symmetrical Resonance Control Chassis

The chassis has a symmetrical structure that controls the sharpness of resonance (Q value) while improving the rigidity balance.

It eliminates the closed-in sound that is common with high-rigidity chassis, achieving a high-resolution, open SOULNOTE sound.

The newly developed heavyweight aluminum front panel also plays a role in this resonance control.

■Standard metal insulators (at time of shipment)

The plastic insulators that were the standard specification in the past have been eliminated, and metal insulators that are more focused on sound quality have been adopted.

■Specifications

Output 80W×2(8Ω),120W×2(4Ω)

Total harmonic distortion 0.08% (40W 8Ω)

Frequency response Speaker(8Ω 1W):3Hz〜300kHz(±1.0dB)

Input sensitivity/impedance LINE1(balanced):700mV/16kΩ, LINE2,3,4:700mV/8kΩ

S/N ratio 110dB(IHF A network)

Power supply voltage AC100V 50/60Hz

Power consumption 190W(J60065), 70W(idling)

Maximum external dimensions Main unit: 430(W)×109(H)×418(D)mm (with spikes attached)

Weight 10.0kg