Hi, I purchased some Chinese Accuphase clone Vu meters, and contacted the seller and he said they are to be hooked up via the speaker wires.. I am running 3 power amps in a single case (a 3way setup with each channel in a single amp case), and I want to run a single vu meter in each case...vs running 3 vu meters per case. My intention was to hookup the VU meter before my Xikica Crossover and run a cable to each amplifier case to power a single meter for that channel..
Is this possible? How can I do this?
This is the meter I purchased...
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Is this possible? How can I do this?
This is the meter I purchased...
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So I could take the output from my pre out RCAs and run it to this board, and hook the meters up to it, and run my XLRs to the power amps (so as to not affect the sound quality)?
My Denafrips Athena allows both to be run at the same time.
https://www.amazon.com/HiLetgo-TDA2822M-1-8-12V-Channel-Amplifier/dp/B07XBKTNKF
None of your links work 🙂
Unless there is some addition electronics already included with the meter then you will most like need either a passive rectifier system (not great as they are insensitive) or a simple active circuit using for example an opamp and an 'active rectifier' perhaps with a peak hold function to ensure the meters respond to low signal levels.
They can be calibrated to whatever you wish them to show by altering the gain of the amplifier.
Something like this:
Unless there is some addition electronics already included with the meter then you will most like need either a passive rectifier system (not great as they are insensitive) or a simple active circuit using for example an opamp and an 'active rectifier' perhaps with a peak hold function to ensure the meters respond to low signal levels.
They can be calibrated to whatever you wish them to show by altering the gain of the amplifier.
Something like this:
Do not use the pre outs unless there's amplification within the meters. The TDA2822 has a 100k impedance input.
The driver board requires power...ac or dc to drive the meters...does this mean it could be used from the preamp outs, and be calibrated with the pots for voltage output? Like 4v is max power and set the meters to max at 4v?
That board should do it all. I see a TA7318 chip which is dedicated meter driver. Data sheet:
TA7318
Looks like there are presets on that board as well to set the levels.
That board looks a bit different chip wise... maybe the TA7318 is obsolete now and its been redesigned using an opamp. In any case you have to get it all connected and fired up first and see if it all does what you want. It all look like it should do.
It won't need a power amp but how much signal it needs is an unknown, that is why you have to couple it all up and try it 🙂
The board needs power and I see AC/DC 12V. The bridge rectifier on the board means it can use either AC or DC and if DC polarity does not matter. I guess High and Low refer to whether you connect to a line level or speaker feed. Ground looks to be common*
You should have instructions supplied with this board.
* if using DC derived from the amp then you really need to figure the board grounds out and see if the power supply ground from the bridge/reservoir cap is the same as the audio ground. That's why you need the correct instructions and/or a circuit of the board. Try powering it with a 9v battery to begin with.
You should have instructions supplied with this board.
* if using DC derived from the amp then you really need to figure the board grounds out and see if the power supply ground from the bridge/reservoir cap is the same as the audio ground. That's why you need the correct instructions and/or a circuit of the board. Try powering it with a 9v battery to begin with.
I wish there had been instructions. I saw in the reviews people commented on no directions and said they figured it out, but no one said how to wire it up.🙁
I reached out to the seller and also reached out to any customers who have purchased this for info on wiring it up.
I thank everyone for assisting me...hopefully I can get instructions somewhere to hook this up.
I thank everyone for assisting me...hopefully I can get instructions somewhere to hook this up.