Tube Power Amplifier205和 <Nagomi>
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Price: 850,000 (tax included)
Antique audio coming back to our time
This product is designed according to the technique of the system measuring that is the major business for Elfinote Technology. The advantage of the basic technique of the measuring instrument is used for the circuit design in order to clear up the reference potential, to prevent the mutual interference among the electrical potentials in each circuit behavior and to completely plan the design to implement one-point grounding wiring.
Furthermore, with the main aim of sophisticatedly sounding the Loudspeaker <001調>, even the vacuum tube is employed as an acoustic part and the sound image localization and channel separation are emphasized to finish the tone quality in quad style. All the same time, this product conforms to Electrical Appliance and Material Safety Law (PSE) went into effect in April 1st 2006 which any home electric appliances must be compliance to and it can be called "Antique audio coming back to our time" providing the sophisticated sound quality.
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Structure |
- In order to eliminate the unclear sound arising from the unwanted vibration, machined aluminum chassis with the thickness of 10 mm is employed.
- The power transformer is placed at the center to equalize the right-and-left weight balance, so the elimination of the unwanted vibration and the safety when moving can be secured.
- The hard cover to protect the transformer group and first-stage circuit and the vacuum tube protection cover that is quite expensive-looking are provided to secure the safety.
- Input terminal with the high-class gold coating and loudspeaker terminal with the oxygen-free machined gold coating are employed.
- AC100V, INPUT and OUTPUT having the PSE countermeasure are provided.
- Elegant design is introduced such as the wood front panel and side wood.
- Machined aluminum leg parts are provided.
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The Tube Power Amplifier <205和> was confirmed to meet the technical criterion of Electrical Appliance and Material Safety Law (PSE) by Japan Electrical Safety & Environment Technology Laboratories (JET).
[Certificate of Test]
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Circuit Parts |
- The power transformer is employed, which safety is already confirmed.
- UL standard articles are introduced for all wiring materials.
- The output transformer is employed, which can perform the UL connection for the optimization of the feedback ratio.
- The circuit parts are employed, such as a high-class resistor and capacitor placed to the right positions.
- The silicon carbide schottky diode is employed for the high-speed and noiseless rectification.
- The high pressure film capacitor is employed for the filter circuit.
- All of the employed vacuum tubes are vintage products.
Circuit
- The safety protection countermeasure by the overcurrent protection element is performed.
- The directly-heated tube drive system is employed.
- The fixed bias system by the stabilized power source is employed for all stages.
- The cathode NF and UL systems are employed not to try to employ the overall negative feedback.
- The double choke circuit system is employed for the drive amplifier (71A amplifier) having the filter circuit independent for each of the right and left channels and for the power tube (KT66 vacuum tube).
- The high-class double carbon volume is employed.
- The 2-input selection circuit providing the mute circuit is employed.
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Specifications
| Power Requirements: | AC100 V 50/60 Hz 400 VA |
| Power Consumption: | 110W |
| Type of Output Section: | KT66 single-end |
| Tubes Used: | KT66 x 2, 71A x 2, 5692 x 1 (all vintage products) |
| Output: | 7 W x 2 |
| Frequency Response: | 20 Hz to 100 kHz |
| Residual Noise: | 1 mV or lower |
| Harmonic Distortion: | 3% or lower/3.5 W, 4% or lower/5.5 W, 5% or lower/7 W |
| Input Sensitivity: | 3.5 W/2.0 Vrms, 5.5 W/2.5 Vrms, 7 W/3.0 Vrms |
| Input Channels: | 2 channels |
| Input Impedance: | 50 kΩ nominal |
| Output Impedance: | 8 kΩ nominal |
| Dimensions (W x H x D): | 482 x 220 x 275 mm |
| Weight: | 24.5 kg |
| Finish: | Clear urethane coating (wood section only) |
| * Please note that specifications and appearance of the product is subject to change without notice. |
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