JBL Stage GT90041 – 4-Channel Class-D Amplifier

The JBL Stage GT90041 is a compact, versatile 4-channel Class-D amplifier built for complete speaker systems or bridged subwoofer duty. You get clean power, flexible crossover control, and a Bass EQ boost to fine-tune your low end. High- and low-level inputs simplify integration with factory or aftermarket head units, while protection circuitry guards against shorts, voltage issues, and overheating. Configure it 4-channel for doors, 3-channel with a sub, or bridge to 2-channel for more punch—then dial it in and enjoy reliable JBL performance. Buy now at TGM Tools.

Key specifications:

• Maximum power: 1480 W peak

• RMS power: 130 W x4 @2Ω / 90 W x4 @4Ω / 260 W x2 @4Ω (bridged)

• Frequency response: 20 Hz – 20 kHz ±1 dB

• THD+N: 1%

• Input sensitivity: 0.2–5 V (low) / 1–25 V (high)

• Bass EQ: 0–12 dB @45 Hz

• High/Low-pass filters: 32–320 Hz (adjustable)

• Protection: short circuit, over/under voltage, overheating

• Supply voltage: 9–16 V

• Fuses: 2 × 30 A

What’s in the box:

• 1 × JBL Stage GT90041 amplifier

• 2 × spare fuses

• 2 × high-level input cables

• 4 × mounting screws with washers

• 2 × Allen keys

• 2 × JBL stickers

• 1 × QR code for manual

• 1 × safety instruction