Class-G series audio power amplifier for subwoofer
Dublin Core
Title
Class-G series audio power amplifier for subwoofer
Subject
Audio power amplifier
Class-AB
Class-G
Power efficiency
Subwoofer
Class-AB
Class-G
Power efficiency
Subwoofer
Description
An audio power amplifier is an electronic device used to amplify a small signal
source power at the input into a large signal power at the output that is speaker.
In general, audio power amplifiers use class-AB amplifiers. In the process of
amplifying the signal power, there will be power losses in the amplifiers which
results in relatively lower amplifier power efficiency because there is a difference
between the supply and output voltage levels. In this paper a class-G series
audio power amplifier for subwoofers is designed to minimize these power
losses and increase the power efficiency of the amplifier. The designed amplifier
voltage supply is 40 V with a maximum output power of 80 W at an 8 Ω
load. The amplifier has frequency response from 20–200 Hz and gain twice.
Realization of the power amplifier and measurements were carried out using
the circuit maker simulator, and the measurement results of the class-G power
amplifier were compared with the class-AB power amplifier. The measurement
results show that both power amplifiers meet the design specifications. The proposed
class-G amplifier has 0.14% larger total harmonic distortion (THD) but
has 10.4% greater power efficiency advantages over the class-AB amplifier.
source power at the input into a large signal power at the output that is speaker.
In general, audio power amplifiers use class-AB amplifiers. In the process of
amplifying the signal power, there will be power losses in the amplifiers which
results in relatively lower amplifier power efficiency because there is a difference
between the supply and output voltage levels. In this paper a class-G series
audio power amplifier for subwoofers is designed to minimize these power
losses and increase the power efficiency of the amplifier. The designed amplifier
voltage supply is 40 V with a maximum output power of 80 W at an 8 Ω
load. The amplifier has frequency response from 20–200 Hz and gain twice.
Realization of the power amplifier and measurements were carried out using
the circuit maker simulator, and the measurement results of the class-G power
amplifier were compared with the class-AB power amplifier. The measurement
results show that both power amplifiers meet the design specifications. The proposed
class-G amplifier has 0.14% larger total harmonic distortion (THD) but
has 10.4% greater power efficiency advantages over the class-AB amplifier.
Creator
Class-G series audio power amplifier for subwoofer
Source
Journal homepage: http://journal.uad.ac.id/index.php/TELKOMNIKA
Date
May 26, 2024
Contributor
PERI IRAWAN
Format
PDF
Language
ENGLISH
Type
TEXT
Files
Collection
Citation
Class-G series audio power amplifier for subwoofer, “Class-G series audio power amplifier for subwoofer,” Repository Horizon University Indonesia, accessed February 4, 2026, https://repository.horizon.ac.id/items/show/10272.