LED VU meter after amp or preamp?

[hernanstafe]

i recently built a led vumeter but, i have to connect it to the preamp or the amp?

 

[hermanv]

If you connect it to the pre-amp output it will show the level of any source selected by the pre-amp.

Please make sure the LED switching circuit can not feed noise back into the signal path. Also, watch out for new ground loops.

 

[acid_k2]

Hi hernanstafe,
you have to consider the sensitivity of the vumeter also.
Amplifiers output voltage is normally a lot higher than a preamp.

 

[hermanv]

Hi hernanstafe,
you have to consider the sensitivity of the vumeter also.
Amplifiers output voltage is normally a lot higher than a preamp.

You are absolutely correct, hernanstafe did not specify sensitivity. Those indicators powered by the speaker drive voltage are not very satisfactory in my experience.

 

[dangus]

If you connect it to the input of the amp, you can calibrate it to read in watts, or dB below full output.