The
Infinity Primus 50011A (item model number
INFPRIMUS50011AAM) is a
high-performance Class D mono subwoofer car amplifier. It is engineered to deliver efficient, high-output power to subwoofers from a compact chassis that fits into tight vehicle spaces.
Technical Specifications
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RMS Power Output:
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300 Watts x 1 channel @ 4-Ohms
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500 Watts x 1 channel @ 2-Ohms
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Peak Power Output: 1,220 Watts
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Frequency Response: 10 Hz – 320 Hz
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Signal-to-Noise Ratio: 75 dB
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Total Harmonic Distortion (THD): 1%
Key Features
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Class D Topology: Highly efficient circuit engineering that minimizes heat generation while producing heavy power levels.
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Start/Stop Engine Compatibility: Regulates power delivery smoothly so audio performance does not drop out when the vehicle engine cycles at stoplights.
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Advanced Bass EQ Controls: Allows customization of a 0 to 12 dB bass boost centered at 45Hz, alongside adjustable width (Q factor) and frequency tuning (30–100 Hz).
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OEM Load Detect System: Simulates speaker impedance loads to cleanly integrate with restrictive factory stereos without needing extra override hardware.
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On-Board Diagnostics Protection: Built-in protection circuitry guards the hardware against short circuits, overvoltage, undervoltage, and extreme thermal spikes.
- Included Remote Bass Controller (RLC)
Core Build & Materials
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Color: Matte black chassis with dark gray brushed accents and copper badge highlights
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Material: Extruded aluminum heatsink core with high-impact ABS endcaps
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Heatsink Type: High-efficiency top-and-side dissipation fins
Audio & System Architecture
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Audio Component Form Factor: Compact single-channel (monoblock) mobile chassis
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Audio Output Channels: 1 channel (designed strictly for low-frequency subwoofer loads)
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Audio Purpose: Dedicated high-output subwoofer driver amplification
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Circuit Design / Topology: Class D (Switching amplifier topology)
Connectivity & Installation
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Compatible Devices: Single or multiple subwoofers (stable down to a 2-ohm load) and car stereo systems
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Connectivity Technology: Hardwired screw-down and plug-in modular interfaces
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Device Interface:
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1 pair of low-level differential-balanced RCA inputs
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Line-level speaker adapter wiring harnesses (included)
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Dedicated RJ25 modular port for the included Remote Bass Controller (RLC)
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Set-screw power, ground, and remote turn-on terminals
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Mounting Type: Flat surface mount (under seat, trunk floor, or custom amp rack/sub box)
Power & Control Features
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Power Source: 12V DC vehicle electrical system (requires direct wiring to the car battery)
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Speaker Enclosure Compatibility: Optimized for sealed, ported, or bandpass subwoofer enclosures
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Amplifier Control Features:
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Variable low-pass crossover filter (LPF) ranging from 32Hz to 320Hz (12dB/octave slope)
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Parameteric Bass EQ controls (0 to +12dB boost adjustment)
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Center frequency selector dial (30Hz to 100Hz)
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Q-factor control dial to adjust the bass boost bandwidth width
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Rotary gain/sensitivity control dial
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