Class D Car Audio 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 subwoofers 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 the 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.
The JBL Audio Stage 9004 Features
- 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
Rob Bak (verified owner) –
This unit is very compact and features many useful options with dual channels, bass eq/boost and frequency pass filters, although there is excessive switching occurring, which is related to the input sensitivity of the high level factory head unit output, which is only partially relieved by reducing the output gain of the amp. This may be a head unit limitation though, but I thought it might save me from upgrading.
Shaun (store manager) –
Rob, thank you for taking the time to leave a review! We’re very glad you’re happy with the 9004! It’s a great little unit. In terms of your input question, you’re 100% correct. With units that run speaker-level input, it’s hard t match the input range. Sometimes it results in lower than expected performance, or as in your case, a little too senstative. There are certain ways that this can be helped. Send us an email and we can assist you further!