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3 (bass mid treble) Tone control circuits projects using NE5532
Hi-Fi Bass, Treble, Presence Tone Control Circuit
Pre tone control stereo bass mid range treble NE5532
Ultra Bass Treble Volume Controller // How to Make Bass Treble Volume
Bass Treble Tone Control Circuit using opamp | Audio Tone Control Circuit
Hi Fi Bass Treble Circuit Diagram | Circuitspedia.com
Passive tone control circuit | Loudness Control | ElecCircuit.com