Latest arrival RCA passive front stage, with remote control relay volume control power amplifier front stage, with 4 RCA inputs
RCA version of the relay volume control finished machine, passive front
stage, 0-300 level volume adjustment, control accuracy and left-right
balance are very good, can be a good substitute for the traditional
potentiometer.
As always, the relay on the board is not economical. Using Takamizawa
signal relay, the signal loss is very small; The resistor used in the
audio part is American DALE Smurf resistor, which has high balance
between the left and right channels, small error and good sound
reproduction.
The power supply of the control part of the machine is not involved in
audio processing, and the signals are input from each input end of the
machine, and then directly output to the output port after changing the
volume through the DALE resistor network, without damaging the sound
quality.
Introduction to machine:
1. The 360-degree coded switch is used in the operation part of the
machine, which feels good. The left side of the machine is the input
selection button, and the right side is the volume and function
adjustment button. The volume can be adjusted from 0 to 300 levels. The
right-handed volume increases and the left-handed volume decreases.
2. With four-channel input function, the machine has four RCA inputs and
two outputs. The four inputs can be selected by rotating or clicking the
SELECT knob on the left side of the panel.
3, with digital display function, the color of the display is orange,
beautiful and generous. The number on the left is the input switching
state, and the three digits on the right are the volume display, which
is very intuitive, and the display brightness can be adjusted by 5
levels.
4. With remote control function, you can remotely control volume up,
volume down, mute, power supply, display brightness and input switching.
Press the remote control volume key, the volume will change step by
step, and hold down the remote control volume key to adjust the volume
continuously and quickly.
5. Remote control with remote control learning function, which can learn
the NEC coding mode of users (general power amplifier audio remote
controls are NEC coding mode).
6. With boot memory function, you will remember the volume, input and
other working conditions when you shut down last time when you boot up.
7. The output has the mute function of relay. When the machine is turned on, the audio output is turned on after a delay.
8. The remaining space inside the machine is enough, and the remaining
space is about 20CM*10CM, so that the burner can upgrade DIY itself and
install other front-stage or small power amplifier boards and other
circuit boards. After upgrading, it will become a beautiful front-stage
or small power amplifier! If you are interested in renovation, you can
contact the store to provide renovation guidance.
9. The machine is equipped with relay control switch. If other circuits
are installed in the machine, it is convenient to control the power
supply of other circuit boards for easy operation and use.
10. Backlight rendering function with knob, and this function can be turned on or off according to your preference.
11. It has the function of independently adjusting the volume of four
inputs, and the volume amplitude of four inputs can be independently
adjusted. For example, input 1 can be adjusted to 20 when accessing
standard audio sources such as CD, input 2 can be adjusted to 50 when
accessing small audio sources such as mobile phones and radios, and
input 3 or 4 can also be adjusted to different volume values
correspondingly, so that the volume of speakers is basically the same
for each input, which is convenient to use. Of course, the machine can
also be set to the overall volume control. When the volume is adjusted,
the volume of four inputs will change at the same time.
12. With power-on volume limiting function, after setting the maximum
volume of power-on, if the volume of last power-off exceeds the set
maximum volume, it will automatically reduce the volume to the set
volume value. If the volume of last power-off is less than the set
maximum volume value, the machine will remember the volume of last
power-off.
13. Using accurate software algorithm, the switching at all levels is very smooth and there is no sonic boom.
14. Machine size: the main body of the case is 230mm wide * 191mm deep *
50MM high. The measured size does not include the knob, RCA seat and
machine foot.
15. The chassis is made of all-aluminum alloy, with solid materials, and weighs about 2kg after packaging.
The operation mode is as follows:
1. Turn the VOLUME knob on the right side of the machine left and right to
adjust the volume, and the three-digit digital tube on the right side
of the display screen displays the volume value accordingly.
2. Click or rotate the SELECT knob on the left side of the machine to
switch the four inputs of the machine, and the corresponding input state
of the three-digit nixie tube on the left side of the display screen.
3. Click the VOLUME knob, then the output will be muted, and the volume
display will flash all the time. Then, repeat the operation once or
rotate the coding switch left and right or press the volume key of the
remote control to cancel the mute and restore the volume.
4.Press and hold the VOLUME knob for a long time, let go when the VOLUME
number is displayed as L (brightness LIGHT code), and then rotate the
volume knob left and right to adjust the display brightness, which can
be adjusted by 1-5 levels.
5. Hold down the SELECT knob and let it go when the knob backlight is on, then you can control the knob backlight.
6. All the above functions can be realized by remote control.
7. Press and hold the VOLUME knob for a long time. When the word U- is
displayed, let go, and you can switch between U-4 or U-A. When U-4 is
used, it is segmented volume control. U-A is the total volume control.
8. Press and hold the VOLUME knob for a long time. When the words A3.0.0
are displayed, let go, and then rotate the coding switch left and right
to adjust the corresponding amplitude limit number, and then set the
boot volume limit value. After adjustment, after a few seconds, it will
be automatically stored and returned.
9. Press the VOLUME knob for a long time, and let go when it is displayed
as 888 888. At this time, the remote controller is IN learning state. At
this time, rotate the VOLUME knob, and press the corresponding key of
the remote controller to be learned when in (input), VOLUME plus (volume
down) and po (power supply) are displayed. After learning, click the
volume knob to store. In the learning state, if the VOLUME knob is
turned until CLEA(CLEAR) is displayed on the display, click the VOLUME
knob, then the learned data will be cleared and the user will exit.
10. Press and hold the VOLUME knob for a long time, and then let go when
the volume number is displayed as I R. You can switch between i r1, i
r2, and i r3 to turn off the function of the random remote controller.
The power supply of the machine is 220V AC by default, or the machine with
110V power supply can be customized. Please note when placing the order.
Default delivery list: volume control finished machine *1+ remote control *1.
The following are machine pictures, all of which are taken in kind.
