The VELLEMAN K1803 Universal Mono Pre-Amplifier Kit is a compact, high-performance audio pre-amplifier designed to boost low-level audio signals for a wide range of electronic and sound system applications. Ideal for hobbyists, students, audio enthusiasts, and DIY electronics builders, this kit provides an effective solution for amplifying weak input signals before they are fed into a power amplifier or audio processing circuit.
Designed as a versatile audio pre-amplifier module, the K1803 is particularly well suited for microphone pre-amplification, signal conditioning, and audio level correction. It increases low-level signals while maintaining excellent sound quality across the entire audible frequency spectrum, making it suitable for speech, music, and general audio applications.
The circuit offers an adjustable gain of up to 40dB, allowing users to optimise output levels for different audio sources. Its wide frequency response of 20Hz to 20kHz ( 3dB) ensures accurate reproduction of the full audio range with minimal signal distortion, making it suitable for both voice and music applications.
Operating from a 10V to 30V DC power supply, the module draws only 10mA, making it an efficient choice for battery-powered and fixed installations alike. The 1k output impedance allows easy interfacing with most audio amplifiers and processing equipment, while the maximum input signal of 40mV makes it ideal for microphones and other low-level audio sources.
With its compact 30 × 44mm PCB, the K1803 can be easily integrated into custom audio equipment, public address systems, intercoms, recording devices, instrumentation, and numerous DIY electronic projects.
Whether you're upgrading an existing audio system, building a custom amplifier, or experimenting with analogue audio electronics, the VELLEMAN K1803 provides reliable performance, excellent audio quality, and flexible integration.
Features
Universal mono audio pre-amplifier kit
Designed for weak audio signal amplification
Ideal for microphone pre-amplification
Suitable for audio level correction
Adjustable gain up to 40dB
Wide 20Hz-20kHz frequency response
Low current consumption
Compact PCB for easy integration
Compatible with a wide range of audio systems
Ideal for DIY electronics and audio projects
Specifications
Product Code: VELLEMAN K1803
Product Name: Universal Mono Pre-Amplifier Kit
Function Group: Audio / Amplifiers
Power Supply: 10-30V DC
Current Consumption: 10mA
Output Impedance: 1k
Maximum Adjustable Gain: 40dB
Frequency Response: 20Hz-20kHz ( 3dB)
Maximum Input Signal: 40mV
PCB Dimensions: 30 × 44mm (1.2 × 1.7")
Typical Applications: Microphone pre-amplifiers, audio signal conditioning, level matching, DIY audio amplifiers, intercom systems, recording equipment, public address systems, instrumentation, educational electronics, and custom audio projects.
What's in the box
1 x VELLEMAN K1803 Universal Mono Pre-Amplifier Kit 10-30V Audio Module
