Ground Zero's GZDSP 4-8XII is an excellent choice as a processor after the car's original player.

The device has 4 input channels, both line-level and speaker-level. You can use two or four of these however you want.

On the output side, there are 8 output channels, the characteristics of which can be defined for each channel yourself. With this device you can make all the divisions of a 4-way system and the delays of each element. Or active 2-way front end, subwoofer and rear speakers. Or whatever combinations come to mind for which 8 output channels are enough.

When using speaker-level inputs, the device is activated when it detects a signal, so a separate trigger from the player is not needed. In addition to that, the excitation current can be forwarded from the DSP to the amplifiers. These features make it easier to connect the device to the car's original speakers.

Optionally available:

GZDSP BT-STICK with which you can get wireless audio streaming directly to the processor.

Wired remote control GZDSP REM 4-8XII


EISA IN-CAR BEST VALUE DSP 2020-2021. - Type 8-channel signal processor (DSP) with 4 input channels
- Sampling frequency 48 kHz / resolution 56-bit
- Frequency range 20 Hz – 20 KHz (-3 dB)
- SNR / line input ≥115 dB
- SNR / high level input ≥105 dB
- THD / line input 0.002%
- THD / high level input 0.010%
- DSP Chipset 2x Analog Devices SigmaDSP
- Sensitivity Line input (RCA) max. 855 mV RMS
- High level input max. 8.0V RMS
- Input impedance Line input (RCA) ≥20 kΩ
- High level input 39 Ω
- Output voltage / channel ≥2.5 V
- Remote current max. 500mA
- Remote input voltage 10 V
- Switching voltage / speaker input 1.3 V
- Switching voltage / line input 10 mV
- Turn on delay 3 seconds
- Recommended fuse value 2 A
- Software Compatibility Microsoft Windows™ XP SP3, Vista, 7, 8, 8.1,10
- Preset memory 6 presets (individually assignable)
- Gain range -60 bis +6 dB
- Equalizer 8x parametric 10 band EQ (20 Hz – 20 kHz) with adjustable Q
- Time delay 0 – 8 ms / 0 – 272 cm / 0 – 107“
- Crossover 6 / 12 / 18 / 24 dB/oct. slope with selectable filter characteristic
- Phase correction 0° / 180°
- Optionally available accessory GZDSP BTS 4-8XII
GZDSP REM 4-8XII
- Dimensions (W x W x H) 169 x 114 x 27 mm..