Introduction of different versions:
Silver FET Version:Silver panel (Field-effect transistor Toshiba k246)
Black FET Version:Black panel (Field-effect transistor Toshiba k246)
Silver Tube Version:Silver panel (Soviet 6h23 electronic tube)
Black Tube Version:Black panel (Soviet 6h23 electronic tube)
By default, all versions are equipped with Bluetooth and remote control.
The first four outputs: for simultaneous outputs, up to four power amplifiers can be connected.
Front-stage all-aluminum remote control (remote control volume version only has remote control)
Note: the middle two INput (in) and OUTput (out) buttons are useless.
The input front panel knob switches, and the output front stage outputs at the same time.
Front-stage all-aluminum remote control (remote control volume version only has remote control)
THD+N=0.09% of the total harmonic distortion of the first 2V signal output is verylow!(The amplification factor of the back-stage power amplifier isgenerally 22-33 times, and the output of the front-stage 2V signal tothe back-stage power amplifier is at least 40V, and the power of the8-ohm impedance speaker is at least 200W/8R at this time.)The distortionof the front-stage output signal is about 2V and its key!It concerns the signal-to-noise ratio of the whole system;Usually, the power amplifier required for listening to songs at home is generally 50-200 watts (except for a few cases where the music needs more power at low frequency).
The maximum output of the first stage is 20V without distortion (1% distortion)!
The noise floor of the front stage is very small, almost no noise floor.
The signal-to-noise ratio of the front stage is as high as 114dB.
The front multi-channel sound source is switched to imported Omron relay with silver contacts.
Manual volume version potentiometer (ALPS 27 type)
Remote control volume version potentiometer (ALPS linear motor control), which
can be controlled by remote controller or manually adjusted.
1: 6-way input switch knob;
2: the corresponding input channel indicator light
3: LED flashing light (the light flashes until the front stage is turned on and the output starts to go off when the preheating system of the engine is turned on;When the remote control version is silent, the light
flashes all the time, and the silent contact light goes out)
4: IR remote control infrared receiver (manual volume version is useless)
5: Power switch
The first six inputs:
DAC: connected to decoder output (analog single-ended)
CD: Connect CD player output (analog single-ended)
AUX: Connect audio output such as computer or TV MP3.
BT: Bluetooth antenna
XLR1: balanced input 1;XLR2: balanced input 2
The input is connected to a balanced audio source such as CD player or decoder.
The latest Qualcomm 5.1 solution Bluetooth
SBC, ACC, APTX, APTX-LL, APTX-HD and LDAC coding formats are supported, and the sound quality is quite good.
Mobile phone Bluetooth connection mode:
The BT blue light corresponding to the previous power-on input mode switching to BT mode (the big knob on the left) lights up;Turn on the Bluetooth function of the mobile phone. When I see LY-BT 5.1
Audio in my device, click to connect it directly, without a password;
After connecting Bluetooth, you can change the Bluetooth name to your favorite.
In the front-stage power supply part, the yellow relay acts as a high-voltage soft start of the front stage of the tube. The characteristics of the tube determine that the filament is heated first and then the high voltage is applied, which can prolong the service life of the tube. This soft start principle: after the front stage is powered on, the filament of the tube is heated for about 20 seconds, and then the high-voltage part is switched on to start rectifying and filtering, while the high-voltage filtering is to raise the voltage steadily and slowly until it is stable. This time is about 10 seconds,which can further protect the tube and prolong its service life. It takes the last 10 seconds for the output relay to turn on. The machine is set to warm up for about 40 seconds after startup before turning on the output. The shutdown output is disconnected instantly, which can protect the rear stage, and the rear stage can be protected without strict requirements on the startup and shutdown sequence of the front and rear stages.
NOTE: Cables not included.
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