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VFD Music Spectrum Display + Acrylic Shell DIY25 Division 17-Level Unassembled For 12-18V Power Amp
Attention:
-
If AC power is supplied, please convert it to DC and supply power
independently. For DC power supply, GND needs to be the same as your
audio GND.
- Please read the text on the PCB and confirm that it is correct before powering on.
Question & Answer:
Q:
Some speakers have BTL output or use Class D functions. There is no
ground terminal at both ends of speakers. Can they be used with this
spectrum display?
A: Yes, there are two situations for this
connection. The first is to use a power source that shares the same
ground with an amplifier, such as the one on a car. At this time,
connect any speaker wire to Lin or Rin, and GND does not need to be
connected again. In the second, a separate power supply is used. At this
time, the power supply is isolated from the power supply of speaker
amplifier. Connect any wire of the speaker to the gnd of the amplifier
to Lin and GND of this screen. If only one speaker is connected, two
speaker wires can be directly connected to Lin and GND of the screen.
FAQ:
Some users say that there is a bright light at the bottom of the screen when there is no music, and suspect this is a quality problem. In fact, this is not a quality problem, but caused by the user's poor music signal itself. It is usually due to the use of poor power supplies. Including the 12 power supply input of this machine, or digital audio equipment like bluetooth speaker, usb speaker, the frequency of this kind of equipment contains a lot of fundamental noise, and some low-end products can be heard directly from speaker. Judging whether it is external noise is actually very simple, just short-circuit the input terminal to ground, and there should be no display on the screen at this time.
Application:
It can be used for home audio modification or DIY, car modification, computer modification, etc. It can only be used indoors and in non-high frequency vibration places.
Package Included:
- 1 x Set of VFD Music Spectrum Display
Note:
- Assembling is needed.
- Power supply is not included.