DI-4.1000 AES DSP system amplifier

Artikelnummer: 6011-0T9U0 Categorieën: ,


The Latest Generation of Digital High-Performance Amplifiers. Made in Germany. Made by Fohhn.

The new DI-Series digital amplifiers have been developed and manufactured in house by Fohhn in Germany. At every stage of development, new intelligent technologies have been implemented. The DSP-controlled amplifiers perform at the highest level and guarantee maximum operational reliability, highest power density and excellent sound.

Since 2002, Fohhn has been developing extremely high quality, reliable digital electronics that have been consistently incorporated into the company’s own product lines. The DI-Series amplifiers represent 15 years of know-how in digital electronics, with a great many customer wishes brought to fruition as a result.

Developed for mobile sound reinforcement applications and fixed installations, the amplifiers offer all the essential features plus virtually unlimited connectivity with regard to audio signal inputs. Even if you opt right now for an AES/EBU, Dante™, Optocore or Analog option, you are not permanently committed: The optional input interfaces can be changed, as required, customizing your amplifier to suit the relevant digital or analogue network.

Extensive DSP input and output processing enables you to intelligently adapt your loudspeaker systems to the particular sound reinforcement situation and room acoustic. All DSP functions can be controlled in real time using FOHHN AUDIO SOFT.

The DI-4.1000 has an output power of 2000 W / 4 ohms per channel, four input- and four output channels. It has a compact 2U / 19“ enclosure and weighs just 9.4 kg. The amplifier works extremely quietly and its fans are not used while idling. 

Important features at a glance:

  • developed for mobile applications and fixed installations
  • network compatible, remote control, remote monitoring
  • extensive DSP input and output processing
  • input options: AES/EBU (terminal block or XLR), Dante™, Optocore or Analog
  • output options: terminal block or Speakon connectors
  • microprocessor-controlled universal power supply, 100-240 V AC, with Power Correction Factor (PFC) and sensory functions for mains voltage, power consumption and temperature
  • Auto Power Save for fan-free idling, temperature-controlled fans
  • two configurable switching contacts, one fault contact
  • performance presets for all relevant Fohhn loudspeakers
  • up to 10 seconds peak power

Virtually unlimited connectivity
The DI-4.1000 is available with a range of different connection options. Input options include AES/EBU (terminal block or XLR), Dante™, Optocore or Analog (XLR). For outputs, you can choose between terminal blocks and Speakon connectors. Depending on the sound reinforcement requirement, the optional input and output interface modules can be swapped over. The amplifier is equipped as standard with digital AES/EBU inputs and terminal blocks. 

Innovative power electronics
At the heart of the DI-4.1000 is the in-house developed, digital, high-performance power supply. As with all amplifiers, this is largely responsible for the sound. It constantly analyses the supply voltage and processes it accordingly (Power Factor Correction). The power supply gives the CLASS D amplifier an enormous performance capability of up to 4000 W within a few milliseconds and a peak duration of several seconds! Therefore, during live music applications the amplifier can perfectly reproduce the full dynamic range across the entire audible frequency spectrum at any time. The result is a significant increase in the available peak power over several seconds. Due to its integrated microprocessor, the power supply is equipped with measuring, monitoring and communications functionality. As a result, important factors such as temperature, supply voltage and capacity can be monitored and controlled accordingly. 

Intelligent control – maximum reliability
The DI-4.1000 is equipped with highly efficient DSP technology. The integrated Fohhn Audio DSPs on each input and output channel include all the essential audio tools such as 10-Band Parametric EQ, Delay, X-Over, Phase, Dynamics Processor or Tone Generator. All settings can be saved as user presets and recalled in real time. Factory setup/performance presets are available for all Fohhn loudspeakers. These provide optimal protection for the speakers and ensure the best possible sound performance for the power level. 
The amplifier is network compatible and can be remotely controlled and monitored. Direct access to all presets and DSP functions is therefore guaranteed at all times. Up to 254 amplifiers can be centrally controlled within a network via FOHHN AUDIO SOFT. Seamless connection to all current media control systems is also possible.
An integral Power-Up Delay enables sequential (remote) power up of multiple connected amplifiers within a rack. For larger installations and live sound applications involving multiple systems, this function significantly eases the general handling. 

Quiet operation
The amplifier fans are temperature controlled and optimised for extremely quiet operation. While idling, the fans are not used (Auto Power Save function). The fan and filter foam can be manually cleaned, without the need for tools.

Digital 4-Channel DSP Amplifier with Network Connection 

Network compatible, DSP-controlled high performance amplifier with 4 input channels and 4 output channels. CLASS D amplifier technology with 1000 W output power at 4 ohms per channel. 

Remote control and monitoring possible via PC and control software. Network-compatible in combination with active DSP devices from the same manufacturer within its own RS-485 based control network. 

Extensive DSP processing with a programmable EQ, Delay, X-Over and Dynamics Processor on each input and output channel. 

Integrated factory presets for protecting connected loudspeakers through selective multiband limiting for high-, mid- and low frequency ranges. Storage of up to 100 custom user presets is also possible.

Equipped with universal power supply with Power Factor Correction and integrated microprocessor with measurement, monitoring and communication functions. Monitoring and control of supply voltage, capacity and temperature. Shutdown in the event of overload. 

Power supply and in-house developed technologies enable a significant increase in peak power over several seconds. 

An integrated Power-Up Delay enables sequential (remote) power up of multiple connected amplifiers in a rack. 

The amplifier has a 19“ / 2U enclosure with power switch, LED display and a magnetically attached front panel for manual, tool-free fan and filter cleaning. The amplifier’s fans are temperature controlled and are not used during idling. 

Ideal for mobile applications due to its low weight (9.4 kg) and for fixed installations due to its high energy efficiency. 

The amplifier is equipped with two programmable switching contacts (switch) and a fault contact for easy integration into the building services. 

Different input- and output options are available. 
Input options: AES/EBU (2 x Phoenix 3-pin), AES/EBU (2 x XLR), Analogue (4 x XLR), Dante™ (2 x RJ-45 1000BASE-T Ethernet) or Optocore (2 x LWL). 
Output options: 2 x 4-pin terminal block or 4 x Speakon connectors

Technical data
Amplifier technology: Class D
Output power: 4 x 1000 W / 4 ohms, 4 x 500 W / 8 ohms, (1 kHz, THD+N < 1 %)
Minimum impedance: 4 ohms
Input channels: 4
Amplifier outputs: 4
DSP routing (matrix): 4 x 4
Frequency response: 20 Hz – 20 kHz
S/N ratio: >100 dB/A
THD+N: 0.08 %, (1 kHz, 8 ohms, 3 dB below clipping) 
Dynamic range: >120 dB
Remote control: RS-485 based control network, control software
Remote monitoring: temperature, protect, AES/EBU signals, power supply, RS-485 based control network, control software
Fault contact: 1 x Relais, 1 x UM, 3-pin Phoenix
Switching contact: load preset, standby on/off
Password protection: yes
Auto Power Save: adjustable from 1 s to 12 h, or never active
Protective circuit: over voltage protection, over current protection, over temperature protection, short-circuit protection, DC protection, power on delay, soft start and inrush current limit
Power supply: 100 – 240 V AC 50/60 Hz, universal power supply with Power Factor Correction (PFC) 
Power consumption: Maximum (RMS) 1200 W, idle state 70 W, auto power save 10 W, standby 5 W, power on/off switch / remote power off 2 W
Heat loss: Maximal 200 W, 680 BTU/h, 172 kcal/h (Pink Noise, 6 dB crest, 1/4 Pmax)
Temperature range: 0 – 40°C
Cooling: temperature-controlled fan
Weight: 9.4 kg
Dimensions (W x H x D): 2 HU / 19?, 485 x 89 x 425 mm

Digital signal processors: 2
Independent limiters: 20
Selective 3-band limiting: bass/mid/high
Band-specific time constants: yes
Filter technology: 80-bit double precision
Input: AES/EBU 32 kHz – 96 kHz, 16/24 bit
Input DSP processing: yes
FIR: yes
Input Gain: -80 dB – +12 dB
Routing Gain: -80 dB – +12 dB
Output Gain: -80 dB – +12 dB
EQ: 8 x 10 fully parametric filters, Gain +/-12 dB, Frequency 10 Hz – 20 kHz, Q 0.1 – 100
Limiter compressor: 8
Noise gate: 8
X-over: 8 x Linkwitz-Riley 4th order (24 dB / octave), high pass 10 Hz – 20 kHz, low pass 10 Hz – 20 kHz
Delay: 4 x 0 – 350 ms (0 – 120 m) outputs, 4 x 0 – 88 ms (0 – 30 m) inputs
User presets: 100
Speaker presets: 100
System latency: 1.2 ms

Connections and controls
Controls: Power on/off switch
Mains connection: 1 x PowerCON
Fault contact (open/close): 1 x Phoenix 3-pin
Switching contact 1 and 2: 1 x Phoenix 3-pin
Remote power in/out: 2 x Phoenix 2-pin
Power Supply for extern, small devices 24 V / 5 W: 1 x Phoenix 2-pin
24 V / 5 W Power LED: green = on

Input interface (AES/EBU)
Inputs: 2 x Phoenix 3-pin AES/EBU, 1 x Phoenix 3-pin RS-485 based control network
Outputs: 2 x Phoenix 3-pin AES/EBU, 1 x Phoenix 3-pin RS-485 based control network
Signal inputs: AES/EBU 32 kHz – 96 kHz, 16/24 bit
Signal outputs: AES/EBU link out from input
Latency: 0.0 ms

Input interface (AES/EBU XLR) 
Inputs: 2 x XLR AES/EBU, 1 x etherCON RS-485 based control network
Outputs: 2 x XLR AES/EBU, 1 x etherCON RS-485 based control network
Signal inputs: AES/EBU 32 kHz – 96 kHz, 16/24 bit
Signal outputs: AES/EBU link out from input
Latency: 0.0 ms

Input interface (Analogue XLR) 
Inputs: 4 x XLR analogue, 1 x etherCON RS-485 based control network
Outputs: 4 x XLR analogue, 1 x etherCON RS-485 based control network
Signal inputs: analogue, max. level +15 dBu
Signal outputs: analogue link out from input
Frequency response: 20 Hz – 20 kHz
THD: < 0.003 % typ.,< 0.0005 % 1 kHz 0 dBu
S/N ratio: >110 dB/A
Input impedance: 10 k ohms
Latency: 1.0 ms

Input interface (Dante)
Inputs: 2 x RJ-45 1000BASE-T Ethernet, Dante and RS-485 based control network
Outputs: –
Latency: Dante +0.6 ms

Input interface (Optocore)
Inputs: 2 x LWL, Optocore and RS-485 based control network

Output option (terminal blocks)
Outputs: 2 x Phoenix 4-pin
Conductor cross-section: max. 6 mm² flexible, 10 mm² rigid

Output option (Speakon)
Outputs: 4 x Speakon

Display (front)
Receive LED / Send LED: remote control, RS-485 based control network
Ready LED : blue = Power on, blue flashing = Sign
Protect LED: red = Error/Protect/Standby
Input LED: 4 x input signal LED, white = signal (> -50 dBFS), red = clip (> -3 dBFS) 
Output LED: 4 x output signal LED, white = signal (> -50 dBFS), red = clip (> -3 dBFS)

Extra informatie

Gewicht9,80 kg
Constructie MateriaalMetaal
BxDxH in cm485 x 425 x 89
Interne PowersupplyJa
Verkrijgbare KleurenZwart
Eindversterker Laag OhmigJa
Aantal Versterkerkanalen4
Minimum Impedantie4
Vermogen aan 4 Ohm1000 W
Vermogen aan 8 Ohm500 W
Input Impedantie10k Ohm
Frequentie Bereik20 Hz - 20 kHz
Signaal Ruis Verhouding> 100 dB/A
DSP IngebouwdJa
Input Gain-80 dB – +12 dB
Remote Control ConnectorRJ45
THD 1kHz0.08