Hi-Fi Phono Preamplifier with RIAA Specification

The circuit was designed according to the RIAA implementation of Hi-Fi phono preamplifier for the purpose of reproducing an audio from a moving magnet cartridge.

Two Way Active Crossover with Linear Phase Response

The circuit was designed for the purpose of creating an active crossover circuit for 2-way output while having a response that is linear in phase.

35 Watts Vacuum Tube Power Amplifier by E80CC and EL34

The circuit was designed to create a power amplifier circuit that will utilize E80CC and EL34 vacuum tubes for better results while providing 35 Watts of power.

TDA2004 Based Headphone Amplifier

The circuit aims to produce a headphone amplifier that would use a single integrated circuit TDA2004 to perform all the necessary functions.

Active Loudspeaker with 3-Way Output

The circuit was designed to create a 3-way active loudspeaker with the use of a tweeter, a mid range, and a woofer.

Middle Frequency Equalizer with Parametric Feature

The circuit was designed to produce an equalizer that would cater the middle frequency signals with limited and parametric attribute.