Single Power Amplifier Kit 300B/2A3 [Limited Model]

Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. - Vacuum tubes used: 300B-98 (made by Suguang) x 2, ECC82 (12AU7) (made by JJ) x 2 *The above vacuum tubes are included in this set * Unless otherwise specified below, 300B + 12AU7 installed, with NFB, at 8Ω load ●Rated output: 8W + 8W (at 300B) / 3.5W + 3.5W (at 2A3) ＜THD 10%＞ ●Rated input: 1Vrms (at 300B) / 650mVrms (at 2A3) ●Residual noise: 15μV (IHF-A) ●Frequency characteristics: 7Hz to 90kHz (with NFB) / 12Hz to 45kHz (without NFB) ●Input impedance: 50kΩ ●Output impedance: 4 to 6.3Ω, 8 to 16Ω (switchable by switch on the back) ●Input terminal: LINE x 1 ●Output terminal: Speaker output terminal: Gold-plated screw terminal (banana plug can be used) Headphone terminal: 6.3mm headphone jack ●Power supply voltage: AC100V 50/60Hz (3P inlet) ●Power consumption: 95W (at 300B) / 65W (at 2A3) ●Body dimensions: W356 x H214 x D320mm (including protrusions) ●Body weight: approx. 11.2kg (excluding power cord)* Vacuum tubes as shown in the photo are not equipped. The standard product does not come with a vacuum tube, but it is a great value set that includes a vacuum tube that is only sold on EC. Attached vacuum tubes: 2 x 300B-98 (manufactured by Suguang), 2 x ECC82 (12AU7) (manufactured by JJ) Direct-heated triodes, "300B" and "2A3", are very popular among audiophiles. With the TU-8900, you can enjoy these two similar and different types of vacuum tubes, the 300B, which has a plump midrange and deep bass, and the 2A3, which has a delicate expressiveness and gentle tone, without changing any special settings. Currently, many vacuum tube manufacturers manufacture a wide variety of "300B" and "2A3" types, and the range of choices is even wider. ■ Automatically distinguish between 300B and 2A3 "300B" and "2A3" are vacuum tubes that look very similar in appearance, but due to differences in filament voltage and operating point, it is necessary to switch the supply voltage. The TU-8900 automatically identifies the vacuum tubes installed and automatically sets the filament voltage and B voltage to match each vacuum tube. When 300B is installed, the left and right sides around the volume glow blue, and when 2A3 is installed, they glow green. Also, if excessive current flows due to an abnormality in the vacuum tube, The channel side will glow red to shut down the current and protect you.