To be discontinued

System Amplifiers

D-4.750

The D-4.750 is a digital 4-channel amplifier for mobile sound concepts and fixed installations. With the corresponding speaker presets, Fohhn DSP amplifiers ensure optimum performance and reliability.

Main features

  • Output power: 4 × 750 W / 4 ohms
  • Extensive DSP processing, controllable in real time with the Fohhn Audio Soft
  • Can be remotely operated and controlled over Fohhn Net
  • 2 analog audio outputs (XLR) with separate DSP
  • Controlled via intuitive control panel with display
  • Installation size: 2 U / 19"

Colours

Fohhn technologies

Technical data

Features

weight
11.6 kg
dimensions (W × H × D)
2 U, 88,9 × 483 × 380 mm

Electronic features

amplifier technology
Class D
inputs / outputs
elektronisch symmetrisch
input sensitivity
1 V
amplifier outputs
4
DSP routing (matrix)
4 × 4
frequency response
20 Hz – 20 kHz
gain
32 dB
signal/noise ratio
>105 dB/A
THD
THD <0.002 %, +3 dBu, 1 kHz THD+N <0.02 %, +3 dBu, 20Hz to 20 kHz
protective circuit
soft start, overtemperature, short circuit, overload
power supply
AC 230 V, 195 V – 250 V AC 50/60 Hz, switch mode power supply
temperature range
0 – 45 °C
cooling
termperature-controlled fan
input impedance
10
output power
4 × 750 W / 4 ohms 4 × 390 W / 8 ohms (1 kHz, THD+N <1 %, 230 V mains)
output impedance
100 ohms
input clipping level
+15 dBu
output clipping level
+20 dBu
internal clipping level
+38 dBu
minimum impedance
4 ohms
input channels
4

Controller

digital signal processors
6
independent limiters
24
selective 3-band limiting
bass / mid / high
system latency
0,64 ms
band-specific time constants
yes
filter technology
56-bit double precision

Remote control and remote monitoring

remote control
Fohhn-Net over RS-485, Fohhn Audio Soft
remote monitoring
temperature, protect, signals

Display (front)

indicators
4 line display 12 × Signal/Level LED 4 × Clip LED 6 × channel select LED 1 × ready LED 1 × over-termperature LED receive/send remote control LED

Connections and controls

controls
Select potentiometer 4 buttons for DSP handling Power on/off switch 6 buttons for channel select

Contact us

+49 7022 93323-0

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