Yamamoto Sound Craft HA-02 Vacuum tube headphone/speaker amplifier
Product code: ha02-1Yamamoto Sound Craft HA-02 Vacuum tube headphone/speaker amplifier
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Maximize the freshness of your sound!
Headphone amplifier using vintage vacuum tubes
WE408A single stage amplification. Unique amplifier perfect for BGM with excellent resolution even at low volumes
The HA-02 is a simple vacuum tube amplifier that uses Western Electric (WE) 408A miniature vacuum tubes, one on each side. Not only can it be driven by headphones, but it can also be used for speaker playback at a lower volume.
Simple is best! Maximize the freshness of the sound
- WE408A single stage amplification: By utilizing the large amplification factor of the 408A pentode tube and configuring it with only one stage of amplification circuit, we have succeeded in bringing out the freshness of the sound to the maximum.
- Low noise and high resolution: The 408A also has excellent noise characteristics, especially at low volumes.
- Perfect for background music: The sound is clearly reproduced even when the volume is turned down, making it an excellent choice for background music while working or studying.
Compatible with a wide range of headphones
- Sufficient output: The maximum output of 300mW provides enough power as a headphone amplifier.
- Wide range of impedance: The optimal load impedance is 50Ω, but it is compatible with headphones with a wide range of impedances from 8Ω to about 600Ω.
- Speaker playback: The speaker system can also be driven, so it is recommended to connect it to a mobile device and work while playing the speaker as background music.
carefully selectedHigh-Fidelityparts
- Output transformer: We aim for the highest sound quality by using Teflon insulating paper for the output transformer, which has the same high performance as high-end models.
- Chassis: Adopts a Complite chassis (wood impregnated with phenolic resin under high pressure), which is popular in the A-08S and other models. It has excellent electrical properties and strength.
- Insulator: The legs are made of rounded African ebony wood that has a high vibration damping effect.
- Terminals:
- The input terminal is our original chrome copper Teflon insulated pin jack.
- The speaker terminals are gold-plated high-grade terminals.
- The headphone jack uses a highly reliable type manufactured by Neutrik.
Connectivity and convenience
- 2 inputs: Equipped with two RCA terminals for connecting CD players, music players, etc.
- Toggle: Input source can be selected using the switch on the top of the chassis.
- Mobile device connection: You can connect most mobile devices such as iPods using the included cable.
| Vacuum tube used | 2 WE408A included |
|---|---|
| maximum output | Headphone terminal 300mW (at 50Ω load) Speaker terminal 240mW (at 8Ω load) |
| Frequency characteristics | 30~21,000Hz (headphone terminal) 45~17,000Hz (speaker terminal) |
| residual noise | Headphone output 100μV Speaker output 70μV |
| input impedance | 50kΩ |
| gain | Headphone output: 9.5dB (at 50Ω load) Speaker output: 1.5dB (at 8Ω load) |
| size | 150(W)325(D)125(H)mm |
| weight | 4.2kg |
The luster and musical thickness typical of vacuum tubes
Among the company's amplifier group, the HA-02 is a model that gives you the feel and luster of a vacuum tube. The sound is smooth, without sharp edges, and has a soft nuance throughout. The way the sound is played emphasizes the flow of the music while minimizing irritation, creating a sound that is so-called ``comfortable to listen to.''
Natural inclusiveness in headphone playback
When playing through headphones, the sound does not come out too far in front of the room, creating a spatial expression that naturally envelops you. Although it is not the type that boasts high resolution, the sound density is high and the fine nuances come out gently. The midrange is thick, and vocals are naturally localized with a sense of real voice.
Expressive power that shines with stringed instruments and vocals
In classical string instruments and acoustic music, the overlapping overtones are beautiful and the sound lengthens naturally. The piano has a round touch and smooth changes in strength, so you won't get tired even if you listen to it for long periods of time. For jazz, the low range is not overly emphasized, and the overall sound is calm and balanced.
with speaker playbackalso a gentle tone
Even when playing through speakers, the basic tonal character of the HA-02 remains unchanged. It is well-suited for use with small bookshelf speakers in compact spaces, allowing you to enjoy dense, rich sound without forcibly pushing it out. It is not intended for high-volume playback, but it is designed to convey the nuances of music carefully.
A unit that prioritizes musicality
The HA-02 is not an amplifier that prioritizes clarity or a sense of speed above all else. Instead, it is tuned to emphasize the natural warmth of tubes and a coherent musical experience. For users who want to immerse themselves and relax while enjoying music, it can be considered a reassuring presence.
