INFINITY PRIMUS 90041A - Primus Series 4-Channel Car Speaker Amplifier | 90W RMS x 4 @ 4ohms

Infinity Primus 90041A | 4‑Channel Car Amplifier | 130 W RMS × 4 @ 2 Ω | 1480 W Peak

The Infinity Primus 90041A is a compact Class‑D 4‑channel car amplifier designed for clean, dynamic sound with high efficiency and installation versatility. Engineered to power both OEM upgrades and full aftermarket systems, the amplifier offers robust tuning features, comprehensive protection circuitry, and solid thermal performance—all in a space-saving chassis built to Infinity’s performance standards.

With 130 W RMS × 4 @ 2 Ω, 90 W RMS × 4 @ 4 Ω, and 260 W RMS × 2 bridged @ 4 Ω, the Primus 90041A provides strong output and flexible configuration options, whether you're driving speakers or subs. Designed with a peak output of 1480 W and featuring a wide range of signal adjustments and filters, it’s an ideal solution for a high-performance 4‑channel setup with minimal distortion and maximum control.

Product Highlights:

Class‑D 4‑channel amplifier with compact footprint and efficient power delivery

High power output supporting full-range speakers or subwoofers in bridged mode

Variable high- and low-pass filters (32–320 Hz) for precision frequency tuning

Selectable bass EQ offering up to 12 dB boost at 45 Hz for punchy low-end

Low and high-level inputs (0.2 V – 5 V) compatible with OEM and aftermarket sources

Full protection circuit including DC, over/under voltage, overcurrent, and thermal safeguards

Optimized for modern vehicles, including compatibility with start-stop systems

Tech Specs:

Model: Primus 90041A

Type: 4‑Channel Car Amplifier (Class D)

Power Output:

 • 90 W RMS × 4 @ 4 Ω

 • 130 W RMS × 4 @ 2 Ω

 • 260 W RMS × 2 Bridged @ 4 Ω

 • Peak Power: 1480 W

Frequency Response: 20 Hz – 20 kHz ±1 dB

THD+N @ Rated Power: < 1%

Signal-to-Noise Ratio: > 75 dB (ref. 1 W)

Input Sensitivity:

 • Low-Level: 0.2 V – 5 V

 • High-Level: 0.5 V – 15 V

Filter Controls:

 • LPF & HPF, Variable: 32 Hz – 320 Hz

 • Bass EQ @ 45 Hz: 0 – 12 dB Boost

Protection Features: DC, Over-Voltage (OVP), Under-Voltage (UVP), Over-Current (OCP), Over-Temperature (OTP)

Operating Voltage: 9 V – 16 V

Fuse Rating: 2 × 30 A

Dimensions (H × W × L): ~50.6 × 145 × 268.6 mm

Weight: ~1.85 kg

Applications: Ideal for powering front and rear speakers, full-range systems, or bridged subwoofer setups in cars, vans, or SUVs.