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DSP Amplifiers

MA-4.100

The MA-4.100 is a compact 4-channel digital power amplifier for media applications and small sound system solutions. The DSP amplifier with a 4 × 4 matrix is ideal for, e.g. equipping conference and training rooms as well as for installation in media steles. It can be easily integrated into media controls via RS-485 and is effortlessly configured with the Fohhn Audio Soft via a USB-C socket.

Main features

  • 4 × 100 W peak / 4 ohms
  • Available in two variants: With Analog Inputs (MA-4.100 ANA) or Dante Input (MA-4.100 DAN)
  • Compact dimensions: 9.5" / 1 U, 170 mm installation depth
  • Switchable phantom power on each input channel
  • Two freely programmable switching contacts
  • With Fohhn Airea connection
  • Can be remotely operated and controlled over Fohhn Net
  • Temperature controlled, low noise fan
  • Auto Power Save for minimum standby power requirements
  • Fohhn speaker presets ensure maximum safety, reliability and excellent sound quality
  • 100% engineered and made in Germany

Colours

Fohhn technologies

Possible interfaces

Technical data

Loudspeaker features

weight
1.2 kg
dimensions (W × H × D)
1 U / 1/2 19", 211 × 45 × 170 mm

Electronic features

amplifier technology
class D
amplifier outputs
4
DSP routing (matrix)
4 × 4
frequency response
20 Hz – 20 kHz
signal/noise ratio
>103 dB/A
THD+N
0,08%
dynamic range
>120 dB
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) 65 W, Idle state 7 W, Auto Power Save 2 W, Standby 2 W
heat dissipation
max. 15 W, 51 BTU/h, 13 kcal/h
temperature range
0 – 40 °C
cooling
temperature-controlled fan
output power
4 x 65 W / 4 ohms, 4 x 35 W / 8 ohms (1 kHz, THD+N < 1 %)
minimum impedance
4 ohms
input channels
4

Controller

digital signal processors
1
independent limiters
20
FIR filter
yes
input gain
-80 dB – +12 dB
routing gain
-80 dB – +12 dB
output gain
-80 dB – +12 dB
EQ
8 × 10 fully parametric filters, Gain +/-12 dB, Frequency 10 Hz – 20 kHz, Q 0.1 – 100
selective 3-band limiting
bass / mid / high
limiter / compressor
8
noise gate
8
delay
4 × 0 – 145 ms (0 – 50 m) outputs, 4 × 0 – 30 ms (0 – 10 m) inputs
X-over
8 × Linkwitz/Riley 4. order, 24dB/oktave, Highpass 10 Hz – 20 kHz, Lowpass 10 Hz – 20 kHz
user presets
100
speaker presets
100
system latency
1.2 ms
band-specific time constants
yes
filter technology
80-bit double precision
input
Analog or DANTE 32 kHz – 96 kHz, 16/24 bit, AES/EBU
Input DSP processing
yes

Remote control and remote monitoring

remote control
Fohhn-Net over RS-485, Fohhn Audio Soft, USB-C
remote monitoring
temperature, protect, power supply, Fohhn Net, Fohhn Audio Soft
switching contact
Load preset, Standby On/Off

Display (front)

ready LED
blue = Power on, blue blink = Sign
protect LED
red = Error / Protect / Standby
USB Config LED
blue = Host, remote control over USB

Connections and controls

outputs
Phoenix 8-pin, max. 3.3 mm² flexible, 3.3 mm² rigid
USB Config
1 × USB-C socket
Airea Net
1 × RJ45
mains connection
IEC socket
switching contact 1 and 2
1 × Phoenix 3-pin

Display (rear)

receive / send LED
Remote control, Fohhn-Net

Input interface analog

THD
< 0,005 % typ. < 0,003 % 1 kHz 0 dBu
signal inputs
Analog, max. signal +18 dBu, phantompower (24 V DC) switchable
inputs
4 × analog/mic
input impedance
10 kohm
frequency response
20 Hz – 20 kHz
latency
1,0 ms
S/N ratio
> 108 dB/A

Connection variants

Input interface Dante

Features

latency
Dante +0,6 ms
inputs
1 × RJ-45 100BASE-T Ethernet, Dante, 4 × 48 kHz
Support for AES67
Yes

Contact us

+49 7022 93323-0

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