BRZHIFI PA-400 Mono Class D Power Amplifier

BRZHIFI PA-400 Mono Class D Power Amplifier

The BRZHIFI PA-400 Mono Class D Power Amplifier is a premium-grade mono power amplifier engineered for audiophiles, studio professionals, and high-end home theater systems. Designed with advanced Purifi-inspired Class D architecture and a Hypex-based power supply system, it delivers ultra-low distortion, extremely high dynamic range, and unmatched sound purity.

This amplifier is built for users who demand absolute clarity, precise sound imaging, and powerful output without compromise. With cutting-edge engineering, it achieves near-transparent audio reproduction, making it one of the most refined mono amplifier solutions in its category.

Advanced Purifi-Inspired Class D Architecture

At the heart of the BRZHIFI PA-400 is a high-performance Class D amplification design inspired by Purifi’s 1ET400A module technology, known globally for reference-level audio accuracy.

Core Architectural Strength

• Ultra-low distortion switching design

• High-efficiency signal amplification

• Minimal phase distortion output

• High linearity audio processing

• Stable performance under load

Key Advantage

The Purifi-style architecture ensures that the amplifier behaves almost like a “wire with gain,” meaning it amplifies the signal without adding coloration or distortion.

Ultra-Low Distortion Audio Performance

One of the most important highlights of the BRZHIFI PA-400 is its extremely low Total Harmonic Distortion (THD), making it suitable for critical listening environments.

Distortion Performance

• THD: 0.0009%

• Near-lab-grade signal purity

• Extremely low harmonic interference

Audio Benefits

• Transparent sound reproduction

• No artificial coloration

• Accurate instrument separation

• High-resolution audio clarity

This level of distortion performance ensures that every detail in the audio signal is preserved with extreme accuracy.

Extremely High Dynamic Range for Natural Sound

The amplifier delivers an impressive dynamic range, allowing it to reproduce both subtle and powerful audio signals without compression.

Dynamic Range Specification

• A-weighted 4Ω: 129dB

Dynamic Advantages

• Clear separation of soft and loud sounds

• Realistic soundstage depth

• Improved micro-detail reproduction

• Natural audio transitions

This makes it ideal for orchestral music, cinematic soundtracks, and high-resolution audio playback.

Zero Crosstalk for Perfect Sound Imaging

The BRZHIFI PA-400 is designed with zero crosstalk architecture, ensuring complete channel separation and accurate stereo imaging in mono configuration setups.

Crosstalk Benefits

• Accurate sound localization

• No signal interference between channels

• Pure and focused audio output

• Improved spatial sound precision

Result

The sound image becomes more stable, precise, and realistic, especially in high-resolution recordings.

High-Efficiency Hypex Power Supply System

The amplifier uses a high-quality Hypex-based power supply system that enhances performance stability and efficiency.

Power Supply Benefits

• Stable voltage delivery

• Reduced noise interference

• Efficient power conversion

• Improved audio consistency

Why It Matters

A stable power supply ensures that the amplifier maintains consistent performance even under heavy load conditions.

Powerful Output Performance

The BRZHIFI PA-400 is designed to deliver strong and stable output power suitable for demanding audio systems.

Power Output Specifications

• 450W @ 2Ω

• 425W @ 4Ω

Output Benefits

• High-power audio delivery

• Strong bass response capability

• Suitable for large speaker systems

• Stable performance under load

This makes it ideal for subwoofers and high-performance speaker systems.

Adjustable Gain Control for Flexible Setup

The amplifier offers gain adjustment options, allowing users to fine-tune audio performance according to their system requirements.

Gain Settings

• 20dB gain mode

• 29dB gain mode

Benefits

• Flexible system matching

• Improved sound balance

• Better control over output levels

• Optimized audio performance

This ensures compatibility with a wide range of audio systems.

Wide Frequency Response for Full-Range Sound

The BRZHIFI PA-400 provides a flat and wide frequency response, ensuring accurate reproduction across the entire audio spectrum.

Frequency Range

• 20Hz – 20kHz

Frequency Benefits

• Deep bass reproduction

• Clear midrange vocals

• Smooth high-frequency output

• Balanced tonal response

This ensures natural and accurate sound reproduction.

High Signal Sensitivity and Clean Input Processing

The amplifier supports precise input signal handling for high-quality audio reproduction.

Input Specification

• Input Sensitivity: 1.2Vrms

Input Benefits

• Accurate signal detection

• Clean audio processing

• Minimal signal loss

• Stable input performance

This ensures faithful reproduction of source audio.

High-Efficiency Class D Design

The BRZHIFI PA-400 uses modern Class D technology for high efficiency and low heat generation.

Efficiency Features

• Efficiency above 94%

• Low heat production

• Reduced power loss

• Stable long-term operation

Benefit

It allows continuous high-power usage without overheating issues.

Compact Yet Heavy-Duty Design

Despite its advanced internal architecture, the amplifier is designed in a compact and durable form factor.

Physical Specifications

• Size: 240 × 258 × 79 mm

• Gross Weight: 4.5 KG

Design Benefits

• Space-efficient structure

• Solid metal chassis

• Vibration-resistant build

• Professional industrial design

This makes it suitable for both home and studio environments.

Professional Audio Applications

The BRZHIFI PA-400 is suitable for a wide range of professional and high-end audio setups.

Application Areas

• Audiophile stereo systems

• Studio monitoring systems

• High-end home theater setups

• Subwoofer amplification

• Precision sound installations

This makes it a versatile mono amplifier solution.

Stable Performance Under Heavy Load

The amplifier is designed to maintain stable performance even during demanding usage conditions.

Stability Features

• Thermal stability under load

• Continuous power handling

• Reliable circuit design

• Long-term durability

This ensures consistent audio output in all environments.

Audio Phonic Quality Engineering

As part of Audio Phonic’s commitment to high-end sound engineering, the BRZHIFI PA-400 is built with precision components and strict quality standards.

Quality Highlights

• Premium-grade electronic components

• Precision circuit layout

• Low-noise audio design

• High-end engineering standards

This ensures a professional-grade listening experience.

Why Choose BRZHIFI PA-400 Mono Amplifier

The BRZHIFI PA-400 stands out in the high-end mono amplifier category due to its extreme precision, ultra-low distortion, and reference-grade sound performance.

Key Features Summary

• Purifi-inspired Class D architecture

• THD as low as 0.0009%

• 129dB dynamic range

• Zero crosstalk sound imaging

• Hypex-based power supply

• 450W high-power output

• Wide 20Hz–20kHz response

• Adjustable gain control

• High-efficiency 94% operation

• Compact yet heavy-duty build

This makes it a top-tier choice for audiophiles and professionals.

Technical Specifications of BRZHIFI PA-400

General Information

• Brand: BRZHIFI (Audio Phonic distribution context)

• Product Name: BRZHIFI PA-400 Mono Class D Power Amplifier

• Category: Power Amplifier

• Channel: Mono Output

Performance Specifications

• Power Output: 450W @ 2Ω, 425W @ 4Ω

• THD: 0.0009%

• Dynamic Range: 129dB (A-weighted)

• Frequency Response: 20Hz – 20kHz

Electrical Specifications

• Input Voltage: 220V

• Input Sensitivity: 1.2Vrms

• Gain Settings: 20dB / 29dB

Physical Specifications

• Size: 240 × 258 × 79 mm

• Weight: 4.5 KG

Frequently Asked Questions (FAQs)

What type of amplifier is BRZHIFI PA-400?

It is a high-end mono Class D power amplifier based on Purifi-inspired architecture.

What is its main advantage?

It delivers ultra-low distortion, high dynamic range, and extremely accurate sound reproduction.

Is it suitable for audiophile systems?

Yes, it is designed specifically for high-end audiophile setups.

What is its power output?

It delivers 450W at 2Ω and 425W at 4Ω.

What is THD level?

It has an extremely low THD of 0.0009%.

Does it support stereo?

No, it is a mono amplifier designed for single-channel output.

What is special about its sound quality?

It offers zero crosstalk and ultra-high clarity sound imaging.

Is it good for subwoofers?

Yes, it is excellent for high-performance subwoofer systems.