Yamamoto Sound Craft AT-03-3A Highest Quality Attenuator Unit
Product code: AT-03-3AYamamoto Sound Craft AT-03-3A Highest Quality Attenuator Unit
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Delicate, bright and comfortable sound
High-performance attenuator unit that can be used for digital and analog devices
In addition to the overwhelming amount of information and high-frequency reproduction unique to passive attenuators, it also has a soft and warm tone. It has a light, light sound with no shortage of bass and stretch, delicate, bright and comfortable
The fewer circuits through which music signals pass, making the sound fresher and the sound quality can be improved. The attenuator section of the AT-03-1A and AT-03-3A uses an L-shaped volume adjustment function that switches between 28-point resistors with a switch. The L-pad type has only two resistors that enter the signal source, minimizing the sound quality of the resistor. The loss caused by passing resistors is minimized by the adoption of surface-mount resistors, and almost no noise is generated when switching contacts.
The step interval for each switch point can be adjusted in 2dB steps from 0dB to -38dB, allowing for fine adjustments. The minimum volume can be reduced to -65dB, allowing for any level adjustment. The left and right level deviations when setting the volume for each volume are essentially within 0.2dB, and we have managed to keep the difference between the left and right levels, which is a weakness of continuous volume units, so small that it can be ignored. The impedance is 50kΩ, making it an impedance that can be connected to any device.
The volume adjustment switch and input switching switch for this unit are the 45SD type made by Seiden Co., Ltd., which has a reputation for improving reliability and ease of use. After numerous tests, the resistor in the volume control section uses a 1W type surface mount resistor from DALE, a US company. For the internal wiring of this machine, all wires were made of high purity 6N single wire with a diameter of 1.2mm. The wire is used in a Teflon tube, which has the highest insulation properties.
For the internal wiring of this machine, all wires were made of high purity 6N single wire with a diameter of 1.2mm. The wire is used in a Teflon tube, which has the highest insulation properties.
The dial and feet are made of ebony.
| format | 28 Step Volume Adjustment Attenuator |
|---|---|
| Impedance | 50kΩ |
| Input system Input | Only 3 lines |
| Output system | Only two systems |
| Input switch | can be |
| External dimensions | 200(W) 270(D) 97(H) mm |
| weight | 2.5kg |
Passive attenuators that do not have an amplifier circuit like preamplifiers have a low frequency range, so I was really excited to think that the sound would be lighter in the mid- and high-range ranges, but I didn't feel as lacking in the low frequency range as it was mentioned. The sharp rise is strong, the sound of the space is clear, and the instruments are separated well, allowing you to feel the atmosphere of the site. The air flow of the air can be felt by the brass playing, and the depiction of the female vocals, which are firm and stretch to the high notes, is also vivid. There is no feeling of thinness due to the volume being reduced. If you don't seem to be particularly particular about deep bass, I think it's a bass that is necessary and sufficient.
