SGP3, Class AB Stereo Audio Power Amplifier
1. 750W Shielded Potted Transformer (12kg), Clean Dynamic Power
2. <1W Low Standby Power, Front Panel Independent Buttons
3. 12V/5V Trigger I/O, Sequenced System Power Control
4. XLR & RCA Inputs, Independent L/R Toggle Switches
5. Optimized Thermal Driver Circuit, High-Temp Stability
6. Fully Isolated Compartments, Low Interference
7. Clear Acrylic High-Voltage Safety Guard
8. 430mm CNC Aluminum Chassis, Grounding Post
2. <1W Low Standby Power, Front Panel Independent Buttons
3. 12V/5V Trigger I/O, Sequenced System Power Control
4. XLR & RCA Inputs, Independent L/R Toggle Switches
5. Optimized Thermal Driver Circuit, High-Temp Stability
6. Fully Isolated Compartments, Low Interference
7. Clear Acrylic High-Voltage Safety Guard
8. 430mm CNC Aluminum Chassis, Grounding Post
$2599.00
Model：SGP3
Dimensions：430mm(W) *382mm(D)* 136mm(H)
Net Weight：23Kg
Audio Inputs：XLR × 1, RCA × 1
SNR：130dB, A-Wt., 20~20k Hz
THD+N：< -110 dB (< 0.0003%), A-Wt., 20~20k Hz
Launch Date：2026-10-27
SGP3 color
Black
$2599.00
Silver
$2599.00
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Product Overview
The SGP3 is built for high-resolution audio. As a reference-grade Class AB power amplifier upgraded from the SGP1, it is designed for HRA recording and playback systems.
A custom 750W linear power supply, a 430mm all-aluminum CNC chassis, and a fully isolated anti-interference layout give it the composure to drive speakers with confidence. Low-power standby, 12 V/5V Trigger In/Out linking, RCA single-ended inputs, and a rear-panel grounding post make system integration easier. Performance, cooling, protection, and usability all move forward together in the SGP3.
It carries forward SONCOZ’s new-generation family design language and pairs naturally with the SGL7, SGD7, and other components to form a complete, cohesive system.
Key Highlights
1. Custom 750 W linear power supply : A shielded, potted linear transformer weighing 12 kg. Abundant, clean energy reserves give the amplifier composure when large dynamics arrive.
2. Low-power standby : Independent Power and Standby buttons on the front panel; standby consumption below 1 W. One press and it is ready when you are.
3. 12 V/5 V Trigger In/Out : Supports linked power on/off so the whole system starts in sequence and shuts down cleanly.
4. RCA single-ended and XLR balanced inputs : Independent XLR/RCA input toggle switches for left and right channels—you decide what to connect and what to hear.
5. All-new amplifier driver circuit : Thermal design has been optimized for stable, durable operation even at high temperatures.
6. Fully isolated anti-interference layout : Separate power-supply and amplifier compartments reduce interference and keep the interior clean and organized.
7. Clear acrylic high-voltage guard : Safety protection and circuit visibility in one—operating status at a glance.
8. 430 mm all-aluminum CNC chassis : Screwless front panel for easier rack mounting, integration, and placement.
9. Rear-panel grounding post : Facilitates system grounding and helps reduce ground-loop noise.
Front Panel
Rear Panel
Contents & Specs
SGP3 Unit× 1 AC Power Cord × 1
Trigger Link Cable × 1 User Manual × 1
| Dimensions | 430 × 382 × 136mm (±0.5) |
| Net Weight | 23kg |
| Rated Out Power | 200W x 2 @ 4Ω, 100 W x 2 @ 8Ω |
| SNR | 130 dB, A-Wt., 20 ~ 20k Hz |
| THD+N | < -110 dB (< 0.0003%), A-Wt., 20~20k Hz |
| SNR | < -126dB @ 1kHz, A-wt |
| Output Current | 8A Peak Output Current per Channel |
| Output Voltage | 90 Vpp Peak-to-Peak Output per Channel |
| Output Configuration | Bipolar 4-Parallel Push-Pull per Channel |
| Frequency Response @20~20k Hz | ±0.1 dB @ 8Ω;±0.1 dB @ 4Ω |
| Crosstalk @20~20k Hz | -110 ~ -90 dB |
| Noise Floor | ＜14 µV |
| Input Sensitivity | 2.6 Vrms or 28dB |
| Output Impedance | 20 kΩ |
| Input Impedance | > 20 kΩ |
| Power Consumption | AC110V / 220V~50/60 Hz@10A |
| Standby Power Consumption | ＜1W |
| Audio Inputs | XLR × 1, RCA × 1 |
| Audio Outputs | Binding Posts × 4 (R± / L±) |
| Protection | Dual 10 A Fuse |
