pixabay and wikimedia.
It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
music amplifier sound equipment audio professional studio technology volume panel mixing loud stereo knob level control equalizer channel connection electrical guitar fader sony Epiphone Firefly DSP Solid State Combo Amp July by MikeBirdy Music. Epiphone Firefly DSP Solid State Combo Amp Music Amplifier Sound Equipment tab
Page 2017 Free-images.com. All images are Public Domain