D1 fever-grade HiFi tube ears are bold front-end, using Beijing high-quality 6J9-J tube, the sound of this machine is magnificent, the sound field is open, soft and smooth, especially suitable for vocals, strings, light music, classical music and other music. Very beautiful! The high frequency is delicate, the low frequency is powerful! Can easily push 18-600 ohm headphones, quiet background, no current sound bottom noise! Equipped with two sets of audio signal input, one set is USB signal input(USB-PC), Can be used directly as a USB external sound card, one set is 3.5 analog signal input, when USB signal and 3.5 signal are input at the same time, 3.5 signal input is preferred. Among them, the USB module is divided into classic 2704 chip version and HiFi grade 7022 chip version, choose according to your preference.
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D1 has two sets of outputs, whether the output is connected to your earphones or used as a preamplifier to adjust the tone, connected to your amplifier. Multimedia speakers and other audio equipment will bring you a real HiFi level. Enjoy, the real guts of sound. Of course, if you want to try different bile duct tone styles, D1 can also satisfy you. D1 is compatible with E180F, 6688 and other types of tubes, and you can change it at will.
Specifications:
Output power:>=1100mW (32 ohms)
Adapted headphone impedance: 18-600 ohms
Total harmonic distortion:<0.005%
Signal to noise ratio:>=110DB
Frequency response: 20-30K Hz
Regarding the noise floor current sound problem: It is well known that the noise floor current sound comes from two aspects, one is the amp itself, and the other is the sound source itself or the audio cable.(The audio cable has a very high probability of causing noise at the end), Test the noise floor of the amp itself. It is not connected to the audio input line. After the power is turned on, if the amp is quiet, the signal-to-noise ratio of the amp is very good. If it is not quiet, the signal-to-noise ratio of the amp is low. Note: Changing a different op amp or having a strong electronic interference device around the desktop will also affect the signal-to-noise ratio.
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USB module chip introduction:
Classic 2704 chip: Support sampling rate: 16Bit-32k, 44.1k, 48k.
HiFi 7022 chip: sampling bits: 16bit, 24bit. Sampling rate: 32kHz, 44.1kHz, 48kHz, 96kHz
Control Panel-Sound Settings-You can freely set various output frequencies.
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The packing list of D1 electronic tube amp is: D1 machine*1, electronic tube*2, USB cable*1, power adapter*1
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The aluminum shell is made of laser wire drawing technology, which has a good feel. The surface font is laser engraved, and the color is not faded.
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The internal materials use Weimar and other fever components, which are taken in kind.
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