WO-1
InquireA highly unusual high-end preamplifier built around a resistance-free signal path...
Introducing the Miyajima WO-1
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The WO-1 is Miyajima’s high-end preamplifier, developed around the idea that the music signal should avoid resistance as far as possible. Rather than using a conventional resistive volume control, the WO-1 adjusts volume by changing the gain of the amplifier itself. Miyajima say this concept was first completed in 1999 and further improved by 2014.
The phono equaliser section uses power tubes, offers large allowable input and low impedance, and is described by Miyajima as amplifying without distortion and without relying on negative feedback. The front-panel meter is used to manage precise operation of the relevant vacuum tube stage.
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Specs
| Product Type | High-end preamplifier |
| Volume Method | Gain control rather than resistive volume attenuation |
| Phono Permitted Input | 1,800 mV |
| Output Impedance | 1,900 ohms (plate follower) |
| Amplification Range | 0 times to about 45 times |
| Equalizer Tubes | EF86 and 6BX7-1/2 |
| Volume Circuit Tubes | 12AU7 and 6SN7 |
| Output Circuit Tube | 6BX7-1/2 |
| Power Supply | Large power transformer and four choke transformers |
| Meter Function | Monitors precise operation of the gain-control tube stage |
Our philosophy is to skillfully build superior audio components that will reproduce recorded sound so faithfully, that the artists personality and the emotions in their music are perfectly expressed to the listener. Exceptionally fine audio components will result when music can be reproduced with accuracy and without distortion. When matching theory and musicality, good products are created. We at Miyajima laboratory believe that although we are small, our dedication to the fine details allow us to build the very finest sounding components – ones that will bring you joy every time you to listen to music.
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