Overview & Specifications
Compact 4-Channel Class-FD Design With 1-Ohm Stability - Professional Multi-Channel Power!
1200W Maximum Power with Variable HPF/LPF & Bridgeable Configuration The Pioneer GM-D8704 Class-FD amplifier delivers exceptional multi-channel performance in a compact form factor 50% smaller than traditional Class-AB designs. With 1200W maximum power (4 x 100W RMS at 4Ω, 4 x 150W RMS at 2Ω, or 2 x 300W RMS bridged at 4Ω), this versatile amplifier powers front and rear speakers or combines channels for subwoofer applications. The 1-Ohm stable circuit with Pioneer's Protection Control System continuously monitors internal temperature and automatically adjusts input levels to prevent shutdown while maximizing performance. The included wired bass boost remote provides 0-18dB adjustment at 50Hz for optimal bass control. Advanced audio tuning features include variable low-pass and high-pass filters (40-500Hz, -12dB/oct slope) for precise frequency control, automatic signal sensing with speaker-level inputs for factory integration, and gain control for both RCA (200mV-6.5V) and speaker-level (0.8V-16V) inputs. The amplifier delivers 95dB signal-to-noise ratio and maintains only 0.05% distortion at 10W, ensuring crystal-clear reproduction across the entire 10Hz-50kHz frequency response. Installation is simplified with dual 30A fuses, negative grounding, and ultra-compact dimensions (252mm x 60mm x 215mm) for versatile mounting options. The efficient Class-FD design minimizes heat generation while maximizing power delivery, making this amplifier ideal for comprehensive sound system upgrades.
Features & Benefits:
- 1200W Maximum Power Output - 4 x 100W RMS at 4Ω, 4 x 150W RMS at 2Ω, 2 x 300W RMS bridged for flexible speaker and subwoofer configurations
- 1-Ohm Stable Circuit - Enhanced flexibility for multiple subwoofer connections with stable, durable circuitry and Protection Control System
- Variable HPF/LPF Crossovers - Adjustable 40-500Hz cut-off frequency with -12dB/oct slope for precise frequency control and system tuning
- Wired Bass Boost Remote - 0-18dB boost at 50Hz for real-time bass level adjustment according to listening preferences and music characteristics
- Automatic Signal Sensing - Pioneer's auto-sensing automatically selects between RCA and speaker-level inputs for seamless factory integration
- Speaker-Level Inputs - Connect directly to factory systems without RCA adapters, simplifying installation and saving money
- Ultra-Compact Design - 50% smaller than Class-AB amplifiers (252mm x 60mm x 215mm) for versatile installation in tight spaces
- High-Efficiency Class-FD - Advanced switching technology maximizes power output while minimizing heat generation and current draw
- Protection Control System - Continuously monitors temperature and automatically adjusts input levels to prevent circuit shutdown
- Exceptional Audio Quality - 95dB SNR, 0.05% THD, 10Hz-50kHz frequency response for clean, detailed sound reproduction
Technical Specifications:
- Amplifier Class: Class-FD
- Channels: 4/3/2 (4-Channel, 3-Channel, or 2-Channel Bridged)
- Maximum Power Output: 200W x 4 (4Ω) / 300W x 4 (2Ω) / 250W x 4 (1Ω) / 600W x 2 (4Ω Bridged)
- RMS Power Output: 100W x 4 (4Ω) / 150W x 4 (2Ω) / 125W x 4 (1Ω) / 300W x 2 (4Ω Bridged)
- Total Maximum Power: 1200W
- Impedance: 1-8Ω (1Ω Stable)
- Frequency Response: 10Hz - 50kHz (+0dB, -3dB)
- Signal-to-Noise Ratio: 95dB (IEC-A Network)
- Distortion: 0.05% (10W, 1kHz)
- Variable Low-Pass Filter: 40-500Hz, -12dB/oct Slope
- Variable High-Pass Filter: 40-500Hz, -12dB/oct Slope
- Bass Boost: 0-18dB at 50Hz (Wired Remote Control)
- Inputs: RCA, Speaker-Level with Auto-Sensing
- Gain Control: RCA 200mV-6.5V / Speaker 0.8V-16V
- Maximum Input: RCA 6.5V/25kΩ / Speaker 6.5V/12kΩ
- Fuse: 30A x 2
- Power Supply: 14.4V DC (10.8V - 15.1V allowable)
- Current Consumption: 29A at Continuous Power (4Ω)
- Dimensions: 252mm (W) x 60mm (H) x 215mm (D)
- Weight: 2.9kg