SOUND BARRIER SBR-725HP (Class AB 4-Channel MOSFET Power Amplifier)
Deliver energetic, high-impact sound to your vehicle's audio system with the Sound Barrier SBR-725HP Class AB 4-Channel MOSFET Car Power Amplifier. Designed for car audio enthusiasts seeking heavy output, vocal punch, and solid bass performance on a budget, the SBR-725HP delivers massive dynamic reserve with its high-efficiency MOSFET pulse-width-modulated (PWM) power supply.
Finished in a distinctive anodized red extruded aluminum casing, the Sound Barrier SBR-725HP not only adds a bold custom look to your boot setup, but also functions as an oversized thermal heatsink to pull heat away from internal output transistors during long, loud playback sessions. Its versatile 4/3/2-channel bridgeable layout gives you the flexibility to drive four door speakers, or drive two front components while bridging the rear channels to push an 8", 10", or 12" subwoofer box.
Key Features & Performance Highlights
High-Current MOSFET Power Supply: Built with high-speed switching transistors delivering smooth current delivery with low power sag under heavy bass loads.
6600W PMPO Dynamic Output: High burst capability designed to handle dynamic transients without immediate clipping distortion.
4-Channel Flexible Bridgeable Topology: Powers 4 coaxial/component door speakers (4 × 100W @ 4Ω / 4 × 150W @ 2Ω), or bridges into 2-channel mode (2 × 300W bridged) for running a sub-and-speaker combo.
Active Variable Crossovers & Bass Boost: Onboard Low-Pass Filter (LPF), High-Pass Filter (HPF), and selectable 0dB / +6dB / +12dB Bass EQ allow fine-tuning for crisp vocals and deep low-end thump.
Multi-Stage Protection System: Equipped with intelligent onboard protection circuitry guarding against thermal overheating, short-circuit faults, and speaker overload.
Dual 30A Blade Fuses: Heavy-duty dual fuse protection ensures reliable surge containment for your vehicle's factory battery and alternator wiring.
Technical Specifications
Parameter | Specification |
Brand & Model | Sound Barrier SBR-725HP |
Amplifier Class | Class AB Analog MOSFET |
Channel Configuration | 4 / 3 / 2 Channel (Bridgeable) |
Max PMPO Output | 6600 Watts Max |
Continuous Power (RMS @ 4Ω) | ~80W – 100W × 4 Channels |
Continuous Power (RMS @ 2Ω) | ~120W – 150W × 4 Channels |
Bridged Power Output (@ 4Ω) | ~250W – 300W × 2 Channels |
Frequency Response | 10 Hz – 40,000 Hz |
Signal-to-Noise Ratio (SNR) | ≥ 88 dB |
Total Harmonic Distortion (THD) | ≤ 0.1% |
Fuse Rating | 2 × 30A ATC Blade Fuses |
Heatsink Material | Extruded Thermal Aluminum (Crimson Red) |
Package Contents
1 × Sound Barrier SBR-725HP 4-Channel Amplifier
Mounting Screws & Fastener Kit
Spare 30A Fuses
Wiring & Tuning Manual
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