Match UP 4DSP Universal Amp Upgrade 4 Channel Amplifier & 64 Bit 4 Channel DSP

4-channel Class GD upgrade amplifier with integrated 4-channel 64 Bit DSP for universal applications

The UP 4DSP expands the MATCH UP lineup with a 4-channel amplifier with an integrated 5-channel DSP: the ideal solution for vehicles equipped with simple 2- or 4-channel factory radios where a clearly audible improvement in sound quality is desired – without the complexity of larger multi-channel amplifiers. It is purpose-built to significantly enhance factory sound systems while ensuring clean, unobtrusive integration into the vehicle.

With optional plug-and-play harnesses and an intelligent 4-channel high-level input featuring ADEP.3, the UP 4DSP integrates seamlessly into modern OEM architectures. Its compact size and high efficiency make it the perfect choice for daily drivers, lease vehicles or installations with very limited space – anywhere a high-quality, space-saving and fully everyday-ready upgrade is needed.

• Ultra-efficient 4-channel amplifier with 1-channel line output and 5-channel DSP
• Perfect for upgrading standard sound systems with up to 4 channels
• Optional cable harnesses for easy integration into existing factory sound systems
• Extremely powerful 64 Bit “fixed point” Audio DSP
• ACO – Advanced 32 Bit Co-Processor platform foran  extended feature set
  ISA (Input Signal Analyzer) and InputEQ for easy analysis and compensation of input signals
  DLC (Dynamic Loudness Control) and RTC (Remote Tone Control) for volume-dependent dynamic adjustment of highs and lows
  Proprietary TuneEQ function for automated adjustment of the input, virtual and output equalizers
  SFX (DSP Sound Effects) – Augmented Bass Processing, RealCenter & Co.
• Smart 4-channel high-level input with ADEP.3 circuit
• 1:1 IOR (Input-to-Output Routing) – same number of high-level inputs and amplifier outputs
• VCP (Virtual Channel Processing) allows even more flexible configuration for highly complex sound systems
• Optical input in SPDIF format with sampling rate between 12 and 96 kHz
• Mono RCA output for the connection of an external amplifier e.g., subwoofer amplifier
• SCP (Smart Control Port) for optional accessories like DIRECTOR, CONDUCTOR & Co.
• Auto Remote switch
• Start-Stop capable power supply with extended input voltage range up to 18 V – ideal for modern EV vehicles
• Compact design with low heat dissipation thanks to extraordinary efficiency

Compact Class-D power and integrated DSP for flexible OEM upgrades

The UP 4DSP combines four highly efficient amplifier channels with an integrated 5-channel DSP, providing precise control and solid output power for common loudspeaker configurations.

The two main channels deliver 2 x 60 Watts RMS @ 4 Ω, offering ideal performance for driving a front speaker system. For subwoofer upgrades, two additional channels supply 2 x 85 Watts RMS @ 4 Ω or 2 x 140 Watts RMS @ 2 Ω, forming a strong foundation for compact bass enhancements.

Connectivity and system expansion have also been carefully considered: the mono RCA outpit enables connection of external amplifiers, while the optical SPDIF input allows seamless integration of digital sources or aftermarket head units. The start/stop-ready power supply with an extended operating voltage range up to 18 V ensures full compatibility with modern vehicle platforms, including hybrid and electric models.

Compact design for flexible installation options

The UP 4DSP impresses with its powerful yet compact design, which allows easy installation even in confined spaces.

Augmented Bass Processing

Audiotec Fischer’s proprietary “Augmented Bass Processing”, consisting of the two revolutionary sound features “Dynamic Bass Enhancement” and “SubXpander”, has been especially developed to dramatically improve the bass reproduction of subwoofers.

Product Specification:

• Output power RMS 
  - @ 4 Ohms Channels A - B: 2 x 60 Watts (min. 3 Ohms) 
  - @ 2 Ohms - 
  - @ 1 Ohm - 
  - bridged @ 4 Ohms - 
  - bridged @ 2 Ohms - 
  - Subwoofer output @ 4 Ohms Kanal C - D: 2 x 85 Watts
  - Subwoofer output @ 2 Ohms Kanal C - D: 2 x 140 Watts
• Amplifier technology Class GD
• Inputs 4 x High-level speaker input
• 1 x Optical SPDIF (12 - 96 kHz) 
• Input sensitivity 2.8 - 11 Volts
• Input impedance RCA / Cinch - 
• Input impedance high-level 9 - 33 Ohms with ADEP.3
• Outputs 4 x Speaker output
• 1 x RCA / Cinch
• 1 x Remote Out
• Output voltage RCA / Cinch 3 Volts RMS
• Frequency response 15 Hz - 22,000 Hz
• DSP resolution 64 Bit
• DSP power 295 MHz (1.2 billion MAC operations/second)
• Sampling rate 48 kHz
• DSP type Audio signal processor
• Signal converters A/D: BurrBrown
• D/A: BurrBrown
• Signal-to-noise ratio digital input 102 dB (A-weighted)
• Signal-to-noise ratio analog input 101 dB (A-weighted)
• Distortion (THD @ 1 kHz, 1 W into 4 Ohms) < 0.03 %
• Distortion (THD+N @ 1 kHz, 1 W into 4 Ohms) < 0.03 %
• Damping factor > 50
• Operating voltage 10.5 - 18 Volts (max. 5 sec. down to 6 Volts)
• Power rating DC 12 V ⎓ 35 A max.
• Idle current 260 mA
• Max. remote output current 500 mA
• Operating temperature range -40° C to +70° C
• Fuse 1 x 30 A LP-Mini-fuse (APS)
• Additional features: Class GD technology with dynamically controlled
• power supply, 32 Bit Co-Processor, ADEP.3 circuit, Start-Stop capability, Smart 
• Control Port, USB-C, Auto Remote switch, Line Out
• Dimensions (H x W x D) 46 x 130 x 110 mm /
  1.81 x 5.12 x 4.33"

What's in the Box: