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JBL Stage GT50011 Mono Class D Car Amplifier 500W RMS with Bass Remote
A second-generation Stage GT Series mono Class D car amplifier from JBL, the Stage GT50011 delivers 300W RMS at 4Ω and 500W RMS at 2Ω (1220W peak) with an OEM Load Detect System for seamless factory system integration, variable lowpass filter (32-320Hz), variable bass boost (0-12dB at adjustable Q factor), variable phase adjustment (0-180°), high-level and low-level inputs, Start-Stop vehicle compatibility, LED power and protection indicator, 4-way protection circuitry, and an included wired bass level remote control.
Product Overview
The JBL Stage GT50011 is a 2Ω stable mono Class D subwoofer amplifier from the second-generation JBL Stage GT amplifier series, designed to deliver stadium-quality bass performance in a compact form factor. The advanced Class D output stage delivers 500W RMS at 2Ω and 300W RMS at 4Ω with a 1220W peak rating, providing substantial power reserves for demanding subwoofer configurations including DVC and parallel-wired enclosures at 2Ω.
The new OEM Load Detect System is a standout feature of the Stage GT second generation, enabling seamless integration with factory car audio systems by ensuring the vehicle automatically responds to the new amplifier without negatively impacting the vehicle power grid. This makes the Stage GT50011 suited to modern vehicles with OEM head units and integrated power management systems. The Start-Stop vehicle compatibility feature ensures consistent audio output and improved battery efficiency during momentary pauses at stop signs or traffic lights.
The onboard signal processing includes a variable lowpass filter from 32Hz to 320Hz, variable bass boost from 0 to 12dB with adjustable Q factor for tailored bass control, and variable phase adjustment from 0° to 180° for optimal subwoofer integration with the main speaker system. Both low-level RCA inputs (0.2-5V) and high-level speaker inputs (1-25V) are provided for compatibility with virtually any OEM or aftermarket head unit. The included wired bass level remote control provides convenient volume adjustment from the driver's position. 4-way protection circuitry guards against thermal overload, electrical overload, undervoltage, and speaker short conditions.
Features & Benefits
500W RMS at 2Ω - 2Ω Stable Mono Class D: The Stage GT50011 delivers 300W RMS at 4Ω and 500W RMS at 2Ω with a 1220W peak rating, providing sufficient power reserves for a wide range of subwoofer configurations in 4Ω and 2Ω loads.
OEM Load Detect System - Seamless Factory Integration: The new OEM Load Detect System ensures the vehicle's power management system automatically recognises and responds to the new amplifier without negatively impacting the vehicle electrical system, enabling cleaner integration into modern vehicles with factory head units and OEM power management.
Start-Stop Vehicle Compatible: Designed for compatibility with Start-Stop vehicle systems, maintaining consistent audio output and battery efficiency during momentary engine stops at traffic lights and stop signs.
Variable Lowpass Filter - 32-320Hz: The variable lowpass filter adjusts from 32Hz to 320Hz to precisely limit the frequency range sent to the subwoofer, enabling crossover optimisation for a wide range of subwoofer and enclosure configurations.
Variable Bass Boost - 0-12dB with Adjustable Q Factor: The variable bass boost from 0 to 12dB with adjustable Q factor allows fine-tuned bass enhancement control, delivering a more tailored low-frequency response for different subwoofer configurations and acoustic environments.
Variable Phase Adjustment - 0-180°: The continuously adjustable phase control from 0° to 180° aligns the subwoofer output phase with the main speaker system for optimal bass integration and maximum output at the crossover point.
High-Level and Low-Level Inputs: Low-level RCA inputs (0.2-5V) accept signals from aftermarket head units and DSP processors. High-level speaker-level inputs (1-25V) accept signals directly from factory OEM head unit speaker outputs, providing compatibility with virtually any audio source configuration.
Wired Bass Level Remote Control Included: The included wired bass level remote control provides convenient subwoofer level adjustment from the driver's position without requiring direct access to the amplifier after installation.
4-Way Protection Circuitry: Comprehensive protection against thermal overload, electrical overload, undervoltage, and speaker short conditions ensures long-term amplifier reliability in all operating conditions.
LED Power and Protection Indicator: The onboard LED provides real-time status feedback for power-on and protection mode states.
Compact Design: The compact form factor enables installation in tight spaces including under seats and in boot compartments with limited clearance.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | STAGEGT50011 |
| Brand | JBL |
| Series | Stage GT |
| Generation | 2nd Generation |
| Channels | 1 (Mono) |
| Amplifier Class | Class D |
| Power RMS at 4Ω | 1 x 300W |
| Power RMS at 2Ω | 1 x 500W |
| Peak Power | 1220W |
| Total RMS Power | 500W |
| Impedance Stability | 2Ω |
| Low-Level Input Sensitivity | 0.2-5V |
| High-Level Input Sensitivity | 1-25V |
| Frequency Response | 10Hz-320Hz |
| Variable Lowpass Filter | 32-320Hz |
| Variable Bass Boost | 0-12dB (Adjustable Q Factor) |
| Variable Phase Adjustment | 0-180° |
| Fuse Rating | 60A |
| OEM Load Detect System | Yes |
| Start-Stop Compatible | Yes |
| High-Level Inputs | Yes |
| Bass Level Remote | Yes (Wired, Included) |
| Protection | 4-Way (Thermal, Overload, Undervoltage, Speaker Short) |
| LED Indicator | Power and Protection |
| Recommended Wiring | 8 AWG |
Compatible With
The Stage GT50011 is compatible with virtually any conventional audio source unit and speaker configuration in the automotive market. Low-level RCA inputs accept 0.2-5V from aftermarket head units and DSP processors. High-level inputs accept 1-25V from factory OEM head unit speaker outputs. The OEM Load Detect System ensures compatibility with modern factory power management systems. Confirm subwoofer impedance matches the 2Ω or 4Ω rated output configurations before purchase. An 8 AWG gauge amplifier wiring kit is recommended for installation.
Frequently Asked Questions
What is the OEM Load Detect System on the Stage GT50011?
The OEM Load Detect System is a second-generation Stage GT feature that enables the amplifier to integrate with factory car audio systems without disrupting the vehicle's power management. It ensures the vehicle automatically recognises and responds correctly to the new amplifier, preventing issues such as error messages or power management interference common when adding aftermarket amplifiers to modern OEM-equipped vehicles.
Is the Stage GT50011 compatible with Start-Stop vehicles?
Yes. The Stage GT50011 is specifically designed for Start-Stop vehicle compatibility, maintaining consistent audio performance and improving battery efficiency during momentary engine stops at traffic lights and stop signs.
What subwoofer impedance configurations is the Stage GT50011 suited to?
The Stage GT50011 is 2Ω stable and delivers 500W RMS at 2Ω and 300W RMS at 4Ω. It is suited for single voice coil subwoofers at 2Ω or 4Ω, dual voice coil subwoofers wired to 2Ω in parallel, or multiple subwoofers configured to a 2Ω combined load.
Does the Stage GT50011 work with factory head units?
Yes. The high-level speaker inputs (1-25V) accept direct connection to factory OEM head unit speaker outputs, and the OEM Load Detect System ensures seamless integration with modern factory audio systems. The low-level RCA inputs also accept aftermarket head unit and DSP line-level outputs.
What wiring kit is recommended for the Stage GT50011?
JBL recommends an 8 AWG gauge amplifier wiring kit for installation of the Stage GT50011.
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