Upgraded Version Mono 300W/200W/100W Tube 20V-90V/10V-45V…

Upgraded Version Mono 300W/200W/100W Tube 20V-90V/10V-45V HIFI High Power Audio Amplifier Board + Speaker Protect Relay

Product Overview

This advanced mono audio amplifier board delivers crystal‑clear, high‑power sound for both professional and home audio setups. Designed with a robust 300W/200W/100W output capability, it supports a wide input voltage range of 20V‑90V (high‑voltage mode) and 10V‑45V (low‑voltage mode). The integrated speaker protect relay ensures reliable operation and protects your speakers from damage.

Key Highlights

Versatile power output: 300W, 200W, or 100W per channel
Wide input voltage compatibility: 20V‑90V & 10V‑45V
High‑fidelity audio performance with low distortion
Built‑in speaker protect relay for added safety
Compact, board‑mounted design ideal for custom builds
Durable construction with heat‑sinked components for reliable operation
Easy integration with existing audio systems and amplifiers

Technical Specifications

Output Power: 300W / 200W / 100W (adjustable)
Input Voltage: 20V–90V (high‑voltage) / 10V–45V (low‑voltage)
Frequency Response: 20Hz – 20kHz ±1dB
THD+N: < 0.5%
Impedance: 4Ω, 8Ω, 16Ω compatible
Power Supply: 12V DC or 24V DC (external)
Dimensions: 150mm x 100mm x 30mm (approx.)
Weight: 1.2kg (board only)

Benefits for Audio Enthusiasts

Whether you’re building a custom car audio system, upgrading a home theater, or designing a portable speaker, this amplifier board delivers:

Exceptional sound clarity with minimal distortion
Flexible voltage options for a variety of power sources
Reliable speaker protection to extend the life of your drivers
Compact footprint that saves space in tight enclosures
Easy-to-follow wiring diagram and documentation for quick installation

Installation & Compatibility

Designed for straightforward integration, the board comes with a clear schematic and recommended wiring layout. It is compatible with most standard speaker types and can be paired with a range of pre‑amplifiers or digital-to-analog converters. The included speaker protect relay automatically disconnects the output when a fault is detected, safeguarding both the amplifier and your speakers.

Why Choose This Amplifier?

With a blend of high power, wide voltage range, and built‑in protection, this upgraded mono amplifier board is the ideal solution for audiophiles who demand performance, reliability, and versatility in a single, compact package.

Price: Original price was: $ 14.67.Current price is: $ 7.04.

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