The JBL DSP Amplifier DSP4086 is an 8-channel Class D amplifier designed with digital signal processing, serving as an audio processor for fine-tuning aftermarket audio systems. It is a self-contained audio system featuring 6-channel audio inputs and 8-channel powered audio outputs. The amplifier is designed for ease of use, offering a tuning interface that is accessible for novices while also providing detailed tuning capabilities for experienced installers.
Function Description:
The JBL DSP Amplifier allows users to control fully variable crossovers with selectable 0-to-48 dB slopes, time delay adjustments, and 31-band parametric or graphic EQ adjustment. It also includes an assignable input-to-output mixer with input channel summing, channel gain control, and master volume control. A clipping indicator is integrated to ensure the audio output remains undistorted. The device can save up to 10 presets for different audio settings.
Important Technical Specifications:
- Max Power: 1000W peak
- RMS Power Output @ 2Ω: 60W x 8, <1% THD+N
- RMS Power Output @ 4Ω: 40W x 8, <1% THD+N
- Amplifier Class: Class D
- Battery Voltage Range (Volts): 8V to 16V
- Frequency Response: 10Hz to 22kHz @ -3dB
- Signal-to-Noise Ratio: >90dB @ 4Ω (CEA-2006: 75dB)
- THD+N @ 4-ohm: <1%
- Input Sensitivity (Low Level): 680mV to 6V
- Input Sensitivity (High Level): 1.6V to 15V
- Variable Crossovers: All Channels: HPF, LPF, Band-pass with selectable 0 to 48dB slope
- Gain: Variable, All Channels with PC
- Subwoofer Level Control: Channels 7 & 8 in PC software or using accessory remote control from -30dB to +6dB
- Fuse Rating: 40A
- Minimum Recommended Power/Ground Wire Gauge: 8awg
- Speaker Level Inputs: Yes (RCA adapter)
- Remote Bass Control: Included
- Length: 9-3/8" (237.5mm)
- Width: 5-11/16" (144mm)
- Height: 1-15/16" (49.5mm)
- Weight: Approx. 1000g
Usage Features:
- Connectivity: The amplifier connects to a Windows PC via USB for access to the tuning interface. It supports both line-level (RCA) and high-level (speaker wire) inputs, with screw-on RCA-to-bare wire adapters included for speaker-level signals. All wire connections are conveniently labeled.
- Turn-on Modes: Selectable 12V, Audio Signal Sense, or DC Offset turn-on modes are available, with a 12V remote output.
- Tuning Software: The JBL DSP software allows users to:
- Assign speaker locations to channels.
- Control individual channel volume and mute channels.
- Adjust 0°/180° phase for each channel.
- Link paired channels for even volume and tone control.
- Monitor clipping with an indicator for each channel.
- Adjust time delay to optimize the sound field.
- View system statistics including master volume, subwoofer volume, amplifier voltage, and operating temperature.
- Configure X-OVER points and slopes for each channel.
- Use the Input Mixer to assign and sum audio signals from input channels to output channels.
- Save and delete up to 10 audio settings as presets.
- Save audio system configurations to a computer file.
- Access settings for language selection (English, Spanish, French, Chinese, Japanese), power settings for amplifier turn-on/off delay, firmware upgrades, and resetting to factory settings.
- Reset EQ settings and choose between 31-band parametric or graphic EQ modes.
- Remote Bass Control: A wired remote control allows for quick adjustment of low frequency output (-30dB to +6dB) directly from the driver's seat. This control is capable of controlling subwoofer output level from channel 7 or 8 when assigned as a "sub" channel in the tuning software.
- Power/Protect Indicators: A green light indicates power and normal operation, while a red light signifies protect mode due to conditions like over/under voltage, short circuit, or excessive heat.
Maintenance Features:
- Conformal Coated PCB: The circuit boards are conformal coated to withstand harsh conditions, ensuring reliable performance year after year.
- Troubleshooting: The manual provides guidance for common issues such as no audio/power indicator off, flashing protect indicator, continuous protect indicator, blowing fuse, and distorted audio. These include checking voltage, ground connections, speaker impedance, wiring, and gain settings.
- Harman Standard Reliability Testing: The product undergoes rigorous testing and quality control to ensure durability and performance.
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