Phoenix Gold ZDA6.8 amplifier

ZDA6.8 - Premium DSP amplifier with 6 channels and 8 configurable DSP outputs

ZDA6.8 is a high-performance, 6-channel amplifier with 8 digitally configurable DSP outputs, offering power 260 W RMS (520 W MAX), which significantly improves the sound quality of your car. Using Class A/B technology, it delivers exceptional clarity and warmth of sound, making it ideal for both stand-alone and plug-and-play installations with full OEM integration.

Equipped with an intuitive, built-in DSP processor, ZDA6.8 enables fine-tuning of sound for improved audio performance and a fully personalised listening experience. Bluetooth version 5.0 support allows direct music transfer, so it can operate as an independent audio source (head unit) or bypass the factory system - while retaining full OEM functionality.

Hardware specification:

• Product: ZDA6.8

• Type: DSP amplifier

• Amplifier class: A/B

• Amplified channels: 6

• DSP channels: 8

• Frequency response (-3 dB): 15 Hz ~ 23 kHz

• Maximum power: 520 W

• RMS power (2Ω): N/D

• RMS power (4Ω): 2 × 70 W + 4 × 30 W

• RCA output voltage: 4 V

• DAC: Burr Brown PCM1681

• DSP resolution: 24 bits

• Sampling frequency: 48 kHz

• Signal-to-noise ratio (analogue/digital input): -90 dB

• THD distortion: 0,1%

• Inter-channel crosstalk: -60 dB

• Damping factor: 120

• High-Level input: Yes

• Automatic switch-on: Yes

• Input sensitivity (High-Level): 0.2 V - 20 V

• Input sensitivity (Low-Level): 0.2 V - 5 V

• Operating voltage range: 9 V - 16 V

• Compatibility with Start-Stop system: Yes

• Current consumption at rest: 1,5 A

• Maximum current consumption: 30 A

• Total efficiency (4Ω): 60%

• Power connector: 10 mm²

• Remote control (optional): ZDAWCT

• Low-level outputs (RCA): 8

• Analogue inputs: 6 × High-Level / 2 × Low-Level

• Digital inputs: Bluetooth / Coaxial / USB / SPDIF

• Remote In: Yes

• Remote Out: Yes

• PC connection: USB-B

• Application control: Yes (available soon)

Software specifications 

• Product: ZDA4.8 / ZDA6.8 / ZDA8.8

• PC software: Yes (Windows 10 and Windows 11)

• Mobile application: Yes (available soon)

• Equalizer: 31-band

• Phase control: 0° or 180°

• Filters: High-Pass and Low-Pass

• Filter types: Bessel, Butterworth, Linkwitz-Riley

• Filter gradients (Bessel/Butterworth): Off, -6 dB, -12 dB, -18 dB, -24 dB, -36 dB, -42 dB, -48 dB

• Filter gradients (Linkwitz-Riley): Off, -12 dB, -24 dB, -48 dB

• Time Alignment: 0 - 48 ms (0 - 1632 cm)

• Omitting the EQ: Yes (for individual and all channels)

• Mute: Yes (for individual and all channels)

• Input priority: Yes (dual source support)

• Switch-on delay: Yes (adjustable 5 - 30 seconds)

• Custom signal routing: Yes

• EQ settings: Graphic equalizer / Parametric equalizer

• Delay calculator: Yes (in cm and inches)

• Units of delay: Centimetres / Inches / Milliseconds

• Channel linkage settings: Copy or link (delay / EQ / filters / volume)

• Input sensitivity: -6 dB, -3 dB, 0 dB, +3 dB, +6 dB

• Password protection for presets: Yes

• Full screen mode: Yes

• EQ bandwidth gain: -12 dB to +12 dB for each band

• Adjustable Q value: 0.1 to 12

• Available languages: English, German, Spanish, Chinese

• Adjustable EQ frequency range: 20 Hz - 20 kHz

• Individual channel reinforcement: 0 dB to -59 dB

• Global volume gain: 0 dB to -28 dB

• Channel naming: Yes, separately for each channel

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Optimisation for Plug & Play

The ZDA6.8 has been designed for plug-and-play installations - it is equipped with Molex connectors that work seamlessly with harnesses Phoenix Gold ZDT i ZDC, enabling quick and non-invasive installation on many vehicles - without cutting or modifying wires.

Advanced features such as:

• Auto Turn-On,

• OEM impedance simulation (OIS),

• Start-Stop compatibility,

• Input Priority

- make ZDA6.8 is an excellent choice for factory audio integration.

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Better sound quality than factory amplifiers

DSP amplifier ZDA6.8 sets new standards for in-car sound quality in its price segment, outclassing factory OEM amplifiers. Unlike popular Class D technology, the Class technology used here A/B provides a warmer, more natural sound - restoring true quality to your music. Even without DSP tuning, the sound is noticeably better, and the built-in DSP allows you to adjust the sound even more precisely to your own preferences - regardless of the music genre.

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OIS - OEM impedance simulation

The ZDA6.8 is equipped with a function OIS (OEM Impedance Simulation), which ensures compatibility with today's head units and amplifiers. By simulating the impedance of the speakers, it maintains the full functionality of the factory sound source, eliminating potential plug-and-play installation problems.

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Input Priority

Function Input Priority enables seamless integration with the OEM source. You can use low-level inputs or digital audio sources (Bluetooth, optical, coaxial) without losing essential system sounds such as parking sensors, warning messages or radio.
Example: if the vehicle has a high-pass filter that restricts bass, this can be bypassed by sending music directly via Bluetooth to the DSP - with full OEM functionality.

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DSP outputs - ready for expansion

ZDA6.8 is not only an improvement to the system - it is also a development. Thanks to two free DSP-configurable RCA outputs (channels 7-8) additional amplifiers (e.g. subwoofer) can be connected and fully optimised using DSP software.
Advanced delay, filter and equalization settings are available to guarantee the highest quality also for additional audio system components.

ZDA Series software and features

Take full control of your audio system with free and intuitive PC softwarecompatible with Windows 10 and 11. Connect the amplifier to the computer using the supplied cable USB-B, to access advanced audio tuning tools:

Key software features:

• 31-band parametric equaliser (PEQ) - precise frequency control

• Selectable filter type: Bessel, Butterworth, Linkwitz-Riley

• Adjustable filter tilt: from -6 dB to -48 dB

• Time delay with integrated distance calculator

• Customised signal routing between channels

• Options for linking settings (copying or linking channels)

Thanks to these advanced features, you can perfectly tune the audio system to your own preferences - regardless of the genre of music or type of vehicle.

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Key features of the ZDA series amplifiers:

• Burr Brown OPs - renowned technology from the ZQ series for exceptional audio precision

• Burr Brown PCM1681 DAC - Top-class DAC for crystal-clear sound

• Bluetooth 5.0 - stable and fast wireless connectivity

• Toshiba TDA transistors - high power and energy efficiency

• Die-cast aluminium housing (die-cast heatsink) - advanced cooling even under heavy load

• DSP with 48 kHz sampling frequency - exceptional clarity and processing accuracy

• Gold PCB Design - Phoenix Gold reliability and quality mark

• Molex connectors - reliable and durable plug-and-play connections

• 8-channel DSP (on all models) - almost unlimited configuration possibilities

• Class A/B technology - natural, undistorted sound without the need for fans

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Package contents:

• 1 × DSP amplifier ZDA6.8

• 1 × USB-B cable (1 metre)

• 1 × Universal connection cable (15 cm)

• 1 × Operating manual

• 4 × Mounting feet (with screws)