FBT MDA 4125 Power Amplifier

FBT MDA 4125 Power Amplifier

FBT MDA 4125 is a 4-channel Class D power amplifier.

It powers fixed low-impedance loudspeaker systems and 70 / 100 V lines. An integrated 4 × 4 DSP matrix provides 4 zones with assignable sources.

Control is available in a browser on a computer, tablet or phone, through Ethernet or the integrated Wi-Fi access point. Wi-Fi provides control connectivity.

4 balanced Euroblock inputs have parallel unbalanced RCA sockets. Stereo digital audio can be passed between amplifiers through the S/PDIF input and output.

Main Features

• Zone compressor and source-priority ducking lower background music while a priority announcement is active.
• Input processing provides up to 5 parametric filters per input and 4 stored input-mix scenes.
• A sine and noise generator supports system testing and sound masking.
• Output DSP includes HPF and LPF, parametric EQ, FIR import from CSV or TXT, delay, polarity, peak and RMS limiters.
• 8-pin GPIO supports external volume, standby and mute control.
• Settings support firmware updates, configuration backup, speaker-preset libraries and password protection. The MDA-ZC wall controller is sold separately.
• PowerShare allocates up to 250 W across each channel pair, 1/2 and 3/4, according to load demand.

Dynamic microphones are supported. No phantom power is provided, so a condenser microphone requires a suitable external supply or preamplifier.

Set the output mode before connecting loudspeakers. The initial Hi-Z HPF setting is 70 Hz to reduce transformer saturation at low frequencies.

In 100 V mode, the actual line voltage is 90 V (approximately −1 dB). Dante is not fitted to the standard MDA 4125; MDA 4125D is a separate model.

Technical Specifications

• Power, All Channels Driven: 4 × 125 W at 4 / 8 Ω
• 70 / 100 V Line Power: 2 × 250 W
• Total System Power: 500 W
• Unloaded Voltage (single / bridge): 70 / 140 Vp; 140 / 280 Vpp
• Frequency Response: 20 Hz - 20 kHz (+0 / −0.25 dB, 8 Ω, 3 dB below rated power)
• Signal-to-Noise Ratio: >106 dB (A-weighted, 20 Hz - 20 kHz, 8 Ω)
• THD+N: <0.05% (20 Hz - 20 kHz, 8 Ω, 3 dB below rated power)
• Digital Connection: S/PDIF, coaxial RCA, 75 Ω
• Protection: short circuit, DC, undervoltage, temperature and overload
• Cooling: dynamically controlled fan airflow
• Power Supply: 100–240 V AC, 50/60 Hz, switch-mode with PFC
• Consumption / Standby: 150 W / <0.6 W
• Operating Temperature: 0–40 °C
• Chassis Dimensions (W × H × D): 220 × 44 × 320 mm, 1U
• Weight: 2.8 kg

What’s Included

• 1 × FBT MDA 4125 power amplifier
• 1 × power cable
• Euroblock input and output connectors
• Rubber feet

MDA-RM rack-mount and MDA-WM wall-mount kits are not included.

The included Euroblock connectors terminate the audio input and loudspeaker cables.

Who Is It For

For fixed multi-zone sound systems in retail, restaurants, offices and similar installations.

Can’t find the FBT product you are looking for?

Contact us: info@stageiq.lt or +370 636 55536.