Description

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RG4 -MK4 Mono block – Internal Design Overview

 

The moment you remove the top cover, your eyes are immediately drawn to the massive stainless-steel transformer enclosure. At first glance, you might assume it houses a single transformer powering the amplifier. If so — you would be mistaken.

 

Inside this custom shielded enclosure are two independent 550W audio-grade transformers, delivering a combined 1100W of total transformer power. Each transformer is specially treated and fully encapsulated to eliminate magnetic leakage, ensuring ultra-low noise and maximum purity of power delivery.

 

Why 1100W of Transformer Power Matters

 

A larger transformer means:

 

Stronger current delivery

 

Superior control over demanding loudspeakers

 

Effortless handling of large-scale symphonic dynamics

 

Deeper, tighter, more authoritative bass response

 

When a power supply is undersized, voltage sag occurs during dynamic peaks, leading to clipping and harsh high-frequency distortion. The RG4 MK4’s oversized transformer prevents this entirely — preserving smooth highs, natural mids, and powerful, controlled bass even at high listening levels.

 

Massive Power Supply & Energy Storage

 

Flanking the transformer are the amplifier’s high-capacity filter boards. Each board carries:

 

2 × 47,000µF capacitors

 

Independent ± voltage rail fuses for fine tuning and secondary protection

 

Each channel is equipped with 4 custom 47,000µF high-capacity reservoir capacitors, delivering extraordinary energy storage.

 

Benefits of Large-Capacity Power Storage:

 

Instantaneous current release for demanding speaker loads

 

Reduced voltage fluctuation and ripple

 

Improved low-frequency extension and impact

 

Cleaner background with lower noise floor

 

Expanded dynamic range

 

This is why true high-end amplifiers rely on massive capacitor banks — and the RG4 MK4 is no exception.

 

High-Power Output Stage

 

Each side of the chassis features a large heatsink mounted with a dedicated amplifier board.

 

Each board includes:

 

8 high-power Japanese audio transistors

 

Total of 16 power transistors

 

Combined output capability of 1200W**

 

This massive output stage ensures:

 

Immense current reserve

 

Effortless speaker control

 

Stability into low impedance loads

 

Authority, speed, and dynamic realism

 

Power reserve translates directly into sonic confidence.

 

True Balanced Design

 

From circuit architecture to physical layout, this amplifier is built with full symmetry.

 

Front panel:

 

Power LED

 

Protection indicator LED

 

Rear panel:

 

Centered AC input

 

Balanced XLR input

 

Single-ended RCA inputs

 

Heavy-duty speaker binding posts

 

The result is a true balanced amplifier design, both electrically and mechanically.

 

Comprehensive Protection System

 

The RG4 MK4 includes:

 

Soft-start circuit protection

 

Thermal protection

 

DC offset protection

 

Overload protection

 

Output relay speaker protection

 

Your speakers — and your investment — are fully protected.

 

GR-1 MK2 Dual Mono Balanced Power Amplifier – Specifications

 

Output Power:

 

400W @ 8Ω

 

700W @ 4Ω

 

1000W @ 2Ω

 

Signal-to-Noise Ratio: 110dB

Balanced Gain: 36x (fixed)

Single-Ended Gain: 30x (fixed)

Input Sensitivity: 1.2V

Input Impedance: 22kΩ

Inputs:

 

1 × Balanced (XLR)

 

2 × Single-ended (RCA)

 

Total Harmonic Distortion: 0.005% THD

Frequency Response: <1Hz – 60kHz (±3dB)

Power Consumption (Standby): 50W

Dimensions: 445W × 160H × 200D mm

Weight: 19.5 kg per unit

 

Designed for Serious Audiophiles

 

The RG4 MK4 is built for listeners who demand:

 

Deep, controlled bass

 

Smooth, non-fatiguing highs

 

Massive dynamic headroom

 

Absolute stability under demanding loads

 

True high-end construction quality

 

This is not just an amplifier.

 

It is a statement of power, precision, and musical authority.

It is a refined evolution — combining classic German amplifier DNA with upgraded engineering, superior component selection, and modern execution.

For listeners who demand control, dynamics, stability, and musical realism —
this amplifier delivers with confidence and authority.

The price is for one set of two units, “Price includes worldwide shipping, delivered right to your door.”