JBL Stage A9004 Class D 4/3/2 Channel Amplifier (RMS: 90W*4 (4Ω) 110W*4 (2Ω))

Stage A9004 high power 4 channel compact class d amplifier.

JBL Stage Amps are available in a variety of configurations, delivering the right power and number of channels for full-range and subwoofer applications. For more than four decades, JBL has made the audio experience a lot more satisfying for the car audio enthusiast. With a broad array of loudspeakers, amplifiers and subwooers available, you can drive with ease and exhilaration. These compact amps are equipped with all the important inputs and user controls including a bass EQ as well as LPF and HPF crossover controls for tailoring sound to suit the characteristics of different vehicles. The Stage Amps are easily installed and amazingly reliable—and once they turn on, they'll make a transducer sit up and sing.

Cool industrial design
Black with deep grooves, silver silkscreen, anodized JBL badge top-center with orange end panels and bottom.

Switchable bass EQ
This provides an avaiable bass boost at 45Hz of 6dB or 12dB, serving as a great tool to optimize subwoofer and loudspeaker performance based on location and enclosure type.

Input Level Control
When Low-level inputs are used, this control adjusts the input sensitivity between 200mVrms and 5.0Vrms. When High-level inputs are used, this control adjusts the input sensitivity between 0.5Vrms and 15Vrms.

Reliability
JBL is one of the greatest  audio brands in the world.  This is not a coincidence given the arduous testing and quality control. We take our craft seriously and want every consumer to have a world class experience that lasts and lasts.

Full On-Board Protection
Stage amplification has on-board circuitry to protect them from shorts, temperature, overvoltage and undervoltage. An LED indicator is included on all four models to let you know when one of these condutions exists.

Compact footprint
With it becoming more and more difficult to find spacious locations for amplifier mounting, Stage has been developed in a small compact form factor to allow more location versatility.

Value Engineered
Stage amplification provides true JBL performance at an affordable price while now lacking the features needed to properly tune and optimize performance.

Crossover mode switch
LPF crossover controls is switchable between 0dB to 12dB at 45 Hz giving user ability to adjust sound to the environment and/or application.

Crossover control gives user additional fine tuning
Adjusts the crossover turnover frequency between 32Hz and 320Hz. (One knob for each stereo pair.)

Specifications:

• Power Output: 90Wx4@4ohms
• Frequency Response: 20-20kHz±1dB THD@ROP 1%
• Input Sensitivity: 0.2V-5V
• High Pass Filter, Variable: 32 -320Hz
• Low Pass Filter, Variable: 32 -320Hz
• Bass EQ@45Hz: 0-12dB
• Protection: DC, OVP, UVP, OCP, OTP

What's in the BOX

• 1* Amplifier
• 1* Spare Fuse (x2 for 1-channel and 4-channel model)
• 1* High-level input cable (x2 for 4-channel model)
• 2* Two-color JBL Brand Stickers
• 1* Mounting hardware
• 1* Mounting screws
• 1* Quick start guide
• 1* Warranty Card