Sun Valley SV-S1628D 211/845 amp

Assembled SV1628D available


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Company Background : Sun Valley Co., Ltd. [100% subsidiary of Toyota Industries Corporation]
Product specification
SV-S1628D Kit US$1700.00
SV-S1628D 4 X VCAP ODAM installed - Made and Assembled in Japan US$2,350.00

Type: 845/211 Single power amplifier
Input: Line 1 end with volume
Wiring specification: Hand wiring (power supply
part, BIAS adjuster, hum balancer is a circuit board)
SP impedance: 8Ω (4Ω or 16Ω setting is also available)
Vacuum tube: 845 or 211×2, 12BH7A×2, 12AU7×2
(*vacuum tubes are sold separately)
Rated output: more than 845/16W+16W
more than 211/7.5W+7.5W (8Ω, THD: 10%)
Frequency characteristic: 15Hz~60kHz(1W/8Ω/-3dB)
Gain: 845/25dB, 211/26dB (at 8Ω)
Size: W410xD275xH240(mm)
*including height of vacuum tube. No cage/cover.
Weight 15KG
 

From Mr Ohashi's blog (translated from google translator)​

Matt's amp

Overseas repair projects​

June 27, 2025
I took over the role from my predecessor in the technical department over three years ago, and I have been working every day believing that after-sales service is just as important as the quality of the product. I study every day with the mindset that I can basically solve any problems with products that are more than 20 years old, except for special parts (transformers, mechanical parts, etc.).

Today, I received a maintenance request from overseas. It was the SV-S1616D / 211 specification 120V version.
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Mullard M8136, ELROG 211 specifications
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The coupling is V-Cap.
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Speaker terminals are WBT (Germany)

The complaint this time was about an abnormal voltage in the Lch 12AU7, but upon inspection, we found that there was nothing wrong with the unit itself, and we presume that the problem was probably due to an accidental poor contact. Since we have taken the trouble to take care of it, we will carry out a full inspection so that you can use it with peace of mind.
Overseas repair case_b0350085_03064585.jpgFinally, we checked the amplifier with our standard tube and aged the amplifier. By using a standard tube during measurement, the individual differences of the amplifier can be visualized, and any problems can be detected immediately, improving the reliability of the work. Now everything is OK and we can send it out with peace of mind.

A reunion-like event is planned for tomorrow at the showroom. I wonder what it will be like...I'm really looking forward to it.
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