note:
About tube: 12AT7 or 12AU7 is the used electron tube, 12AX7 is brand-new, when purchase, please indicate the electron tube request, otherwise random-
About power input: single 12V DC input work, there are two types of access socket: 5.5DC input socket or red and black to introduce two kinds of power lines, to facilitate their own installation, when purchasing, please specify the requirements, or random delivery))
parameter:
Frequency response: 20-20Khz
• Input loudness: 500mV
• Operating voltage: DC-12V/0.2A
• Power Supply: 12Vx0.2A
• Input impedance: 20K
• Output impedance: 1K
• Size specifications: 100X70X35mm
• Input terminal: Gold plated lotus seat (RCA)
• Output terminal: Gold plated lotus seat (RCA)
About installation and commissioning: First, turn off the engine during installation, and connect the power supply as close as possible to the power amplifier or CD player to take power. The best condition is to borrow power from the CD or amplifier, directly or independently to the battery power. The difference in resistance between the power cords with different lengths of the CD player and the amplifier is likely to cause noise. Connect the power supply and the audio source to turn the gain knob to the minimum (leftward), then turn on the CD player and the amplifier, and then slowly turn the gain knob. Turn up (to the right). When you hear the sound without distortion, fix the gain knob with hot melt adhesive or other. Because there are tens of millions of car amplifiers on the market, the gain or input sensitivity of different models is different. Gain When the input sound is too low, the unsaturated input sound becomes smaller. On the contrary, if the gain is too large, the input sound of supersaturated input will be distorted. Therefore, the design of this board allows manual gain adjustment to facilitate the different amplifiers. After installation and debugging, start the engine and listen to the current noise generated by the generator when charging the battery. About 10% of the generators have interference, and then a car power filter (board) should be added.
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