HIFI Tube Earphone Amplifier USB DAC Class A 2P2 VMOS FET tube Preamplifier Support OTG
Model No: WVDA1002
There is a USB DAC with tube 2p2 and VMOS FET.
The HIFI earphone amplifier is optimized circuit design, new appearance, beautiful and practical. Pre-amplifier section of tube amplifier adopt direct thermal tube 2P2 and VMOS Field Effect Tube to constitute a hybrid tube amplifier, tube and FET combine their respective strengths to both soft and warm tube taste, another FET fast and powerful. Unique vocal timbre of tube is very suitable for human voice reproduction, especially female voice and violin is very beautiful. Because of class A output with high current, its low frequency is powerful surging, make music more appealing!
Especially sound characteristics of direct thermal tube are transparent sound, fine, good strength and control, making it more cost-effective. Direct thermal tube 2p2 is a low pressure tube, generally power supplied by battery-powered previously, there is a good low-voltage characteristics.
All capacitors are used imported brand one, and resistors used 1% metal film in order to ensure its overall quality. The key parts adopt high quality HIFI components like as volume potentiometer used a dedicated volume one of original ALPS. And HIFI earphone amplifier housing is aluminum alloy shell.
For internal circuit modular design, the amp’s power amplification and signal processing circuit board is divided into two main PCB to power amplifier section, and PCB signal input one for processing and DAC section.
1. Because it is the class A output, current is relatively large, the amp 's shell has a certain high temperature for long time using, , please put it at a good ventilated place;
2. The direct thermal tube has microphone effect, this is also known as "micro- sound effect”, it is a unique for direct thermal tubes. The reason is called “microphone effect”, when direct heat tube work at beginning, the filament will sound a similar “microphone back sound” by external vibration. But when the filaments are stable over time, the sound will automatically disappear. This is why direct thermal tubes have high resolving. When listening direct heat pipe, please place it on a flat table, to avoid a severe vibration on it (If you do not like it, please don’t buy it; if you buy it, you will be recognized the two points above as default.)
3. It has a line input and line output with cable. Line input can take other sources such as CD/MP3, digital players; line output can be connected to powered speakers, amplifiers, etc. Please pay attention behind the line input and earphone output is conversion, insert the earphone then line out off, unplug the earphones line output is switched on.
1. Amplifier Type: Tube 2P2 and VMOS Class A amplifier.
2. Output power :> 500mW.
3. Frequency response: 20Hz-35 KHz.
4. Headphone Impedance: 32Ω-300Ω.
5. USB Input: CM108, support USB2.0
6. DAC: TDA1305T
7. SNR :> 90dB.
8. Line Input: 3.5mm stereo jack.
9. Earphone Output: 6.35mm stereo jack.
10. Support System : Win2K, Win XP, Vista, Win7 (32/64), Win8, Mac OS X. And also support OTG function that smartphone supported (Need to buy a USB to OTG cable in additional).
11. Dimensions: 132mm * 83mm * 65mm (excluding protrusions).
12. Weight: 520g.
1. Input voltage: AC110-240V / 50-60Hz.
2. Output voltage: DC24V 1000mA.
3. Weight: 210g.
4. Packing List:.
HIFI Earphone Tube Amplifier (including tubes) X 1
USB Cable x 1
Power supply x 1
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