Greetings Enthusiasts,


This project aims to create a simple and economical diy headphone amplifier. The amplifier consists of a tone control which can cut/boost up to 5dB. The amplifier’s gain is set to 3dB to ramp up the volume a bit.


It’s my first project and am looking forward to suggestions, critics and improvements. I have attached the SPICE Simulations results and the final schematic. Some of you might argue I have simulated a TL072 OP Amp instead of the TDA1308 amplifier IC. Well, I couldn’t find a Spice directive for TDA1308 compatible with LTSPICE. I have trouble understanding PSPICE. Given that, a part of this project depends on assumptions which is why am looking forward to your advice before fabrication.


Cheers!!

 

Welcome to AAC!

The amplifier’s gain is set to 3dB to ramp up the volume a bit.

I doubt you'll notice a 3dB increase. I'd go for several times that.

 

@Alec_t I restricted it to 3dB because most of the signal will be attenuated by the tone control. The TDA1308 IC can only take a maximum of +-4V on its supply. It can not handle intensities higher than 6dB (ideally). If I max the volume and tone controls, it will clip the audio signal resulting in distortion.