1. What is the input impedance and output impedance of the device?
The audio input impedance will change with the adjustment process and is a non-constant impedance.
The input impedance varies from more than ten K to several hundreds of K during the adjustment process. 10~N00 k
After the audio source is connected, because the audio source output has a certain impedance, if the audio source impedance is less than this impedance, the input impedance is the output impedance of the audio source.
Therefore, it can match most high-impedance amplifiers and low-impedance transistor circuits.
2. What is the tolerance of the resistance in the device?
Components 1% error.
Balanced, RCA compatible relay volume control finished machine, passive front stage, 0-255 level volume adjustment, control accuracy and left and right balance are very good, can replace the traditional potentiometer.
Using high visibility signal relay, signal loss is very small;The resistor used in the audio part is DALE smurf resistor, with high balance between left and right channels, small error and good sound recovery.
The power supply of the control part of the machine does not participate in the audio processing. The signal is input from the input end of the machine, and is directly output to the output port after changing the volume through DALE resistance network, without damaging the sound quality.
Machine introduction:
1. The operation part of the machine adopts a 360-degree code switch, which feels very good. The left side of the machine is the input selection button, while the right side is the volume and function adjustment button.Right turn volume increases, left turn volume decreases.
2. With four-way input function, the machine has two ways of RCA input and two ways of XLR input, which can be selected by rotating or clicking the SELECT knob on the left side of the panel.
3, with digital tube display function, display color for orange, beautiful and generous.The number on the left is displayed as the input switching state, and the number on the right is displayed as the volume, which is very intuitive, and the display brightness can be adjusted at level 5.
4, with remote control function, can be remote control volume up, volume down, mute, power, display brightness and input switch.Click the remote control volume button to change the volume step by step. Press and hold the volume button of the remote control to adjust the volume continuously and quickly.
5. With the remote control learning function, you can learn the NEC coding remote control (generally the remote control for power amplifier and audio is NEC coding).
6, with boot memory function, boot will remember the last shutdown volume, input and other working state.
7. The output is equipped with the mute function of relay. When starting up, the audio output is opened after a delay.
8, the remaining space inside the machine is enough, the remaining space is about 29CM*15CM, so that burn friends to upgrade DIY internal installation of other front or small power amplifier board and other circuit boards, after the upgrade into a beautiful front or small power amplifier yoThe chassis is all aluminum chassis, small power amplifier plate, you can power tube without radiator, directly installed on the bottom of the machine yo, heat dissipation as good.If you are interested in renovation, you can contact the shop to provide renovation guidance.
9. The machine is equipped with a 16A omron relay control switch. When other circuits are installed in the machine, it is convenient to control the power supply of other circuit boards so as to facilitate the control and use.
10, with knob backlight light rendering function, and this function can be turned on or off according to your preference.
11, the use of accurate software algorithm, all levels of switching is very smooth, no boom.
12. Machine size: the main body of the case is 320MM wide * 248MM deep * 70MM high. The measured size does not include the size of knob, RCA seat and machine foot.
13. The case is made of aluminum alloy with solid materials and net weight of about 3kg.
Operation method:
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1. Rotate the VOLUME knob on the right side of the machine to adjust the VOLUME, and the three digital tubes on the right side of the display screen will display the VOLUME accordingly.
2. Click or rotate the SELECT knob on the left side of the machine to switch the four-way input of the machine, and the three digit tube on the left side of the display screen shall enter the corresponding state.
3. Press the VOLUME knob to output mute, and the VOLUME will display flashing prompt. Repeat the operation once more or rotate the coding switch or press the VOLUME button of the remote control to cancel the mute and restore the VOLUME.
4. Long press the VOLUME knob, let go when the VOLUME number is displayed as L(brightness LIGHT code), and then turn the VOLUME knob left and right to adjust the display brightness, which can be adjusted from level 1 to level 5.
5. Press and hold the SELECT knob until the knob backlight is on, then you can control the knob backlight.
6. The above functions can be realized by remote control.
7, long, according to the VOLUME knob to show for 888, 888, at this time for the remote control learning state, then rotate the VOLUME knob, on display IN (input), VoL + (VOLUME), VoL - (VOLUME reduction), Po (power), according to the study for the remote control of the corresponding key, can will study of the remote control button, after completion of study, then click exit after storage VOLUME knob.In the learning state, if the VOLUME knob is turned to display CLEA(CLEAR CLEAR) on the display screen, click the VOLUME knob to CLEAR the learned data and exit.
8. Long press the VOLUME knob and let go when the VOLUME number displays as I r, then switch between I r1, I r2 and I r3 to turn off the random remote control function.