JBL Stage GT 80021 2-Channel Full-Range Car Amplifier (800W Peak | 260W RMS Bridged

Product Overview

Elevate your car's sound system with authentic JBL power and precision tuning using the JBL Stage GT 80021 2-Channel Car Audio Amplifier. Engineered with a sleek, compact bead-blasted anodized aluminum chassis, this versatile full-range amplifier delivers up to 800W peak power and 260W RMS bridged output—making it equally capable of driving high-performance component speakers, coaxial setups, or a dedicated 4-ohm subwoofer.

Designed specifically for modern vehicles, the Stage GT 80021 integrates OEM Load Detect technology and Start/Stop engine compatibility, allowing seamless plug-and-play connection with factory head units without external line-output converters or audio dropouts. With switchable variable crossovers (32Hz–320Hz), adjustable Bass EQ up to +12dB at 45Hz, and comprehensive 5-way onboard circuit protection, it brings reliable, distortion-free sound to tight installation spaces.

Key Features & Performance Highlights

• Flexible 2-Channel / Bridged Power Output: Delivers 80W RMS x 2 at 4 ohms, 130W RMS x 2 at 2 ohms, or bridges into a single powerful 260W RMS x 1 channel at 4 ohms for driving a subwoofer.

• OEM Load Detect & High-Level Inputs: Built-in OEM load detection ensures error-free integration with modern factory stereos, accepting speaker-level inputs from 1Vrms to 25Vrms alongside low-level RCA inputs (0.2V–5V).

• Auto Start/Stop Vehicle Compatible: Engineered to operate smoothly across a wide 9V–16V voltage range,preventing audio cutoffs in modern start/stop engine vehicles.

• Precision Crossover & Variable Bass EQ: Features switchable High-Pass / Low-Pass variable crossovers (32Hz – 320Hz at 12dB/octave) and adjustable Bass EQ (0dB to +12dB at 45Hz) to tailor output for speakers or subwoofers.

• Full 5-Way On-Board Protection: Built-in protection circuitry guards against DC offset (DCP), overvoltage (OVP), undervoltage (UVP), overcurrent/short circuits (OCP), and overheating (OTP).

• Compact JBL Industrial Design: Bead-blasted anodized extruded aluminum body with angular end caps and a glossy JBL emblem offers efficient heat dissipation and easy mounting under seats or in compact trunks.

Technical Specifications

• Brand & Series: JBL (Stage GT Series)

• Model: STAGE GT 80021

• Channels: 2-Channel Full-Range (Bridgeable to 1-Channel)

• Max Peak Power: 800W Peak

• RMS Power Output (4 Ohms): 80W RMS x 2 (Full Range)

• RMS Power Output (2 Ohms): 130W RMS x 2 (Full Range)

• RMS Power Output (4 Ohms Bridged): 260W RMS x 1 (Full Range)

• Frequency Response: 20Hz – 20kHz (±1dB)

• THD+N @ ROP: 1%

• Input Sensitivity: Low-Level (RCA): 0.2V – 5V | High-Level (Speaker): 1V – 25V

• Crossover Filters: Variable High-Pass / Low-Pass Filter (32Hz – 320Hz, 12dB/octave slope)

• Bass EQ @ 45Hz: 0dB – 12dB Variable

• Protection Circuitry: DCP, OVP, UVP, OCP, OTP

• Operating Voltage: 9V – 16V (Start/Stop Engine Compatible)

• Fuse Rating: 25A

What’s in the Box

• 1 x JBL STAGE GT 80021 2-Channel Amplifier

• 2 x Spare Fuses (25A)

• 1 x High-Level Input Cable Harness

• 4 x Mounting Screws with Washers

• 2 x Allen Keys

• 2 x JBL Brand Stickers

• 1 x QR Code Owner’s Manual

• 1 x Safety Instruction Sheet

Frequently Asked Questions (FAQs)

1. Can the JBL Stage GT 80021 power a subwoofer?

Yes. In bridged mode at 4 ohms, it delivers a clean 260W RMS x 1 channel with a switchable Low-Pass Filter (32Hz–320Hz) and +12dB Bass EQ at 45Hz, making it ideal for powering a 10-inch or 12-inch 4-ohm subwoofer.

2. Will this amplifier work with my car's original factory stereo?

Yes. It features high-level speaker inputs (1V–25V) and built-in OEM Load Detect compatibility, allowing direct connection to company-fitted head units without triggering factory stereo errors or requiring an external converter.

3. Does it turn off when my car's Auto Start/Stop feature activates in traffic?

No. With an operating voltage range down to 9V and dedicated Start/Stop compatibility, the amplifier maintains uninterrupted audio playback during engine restarts.