Legrand F503 Power Amplifier Installation Manual

About this manual

The Legrand F503 is a stereo power amplifier designed to reproduce sound signals from BUS/SCS and AUX inputs. It features a graphical display controlled by selection and navigation keys, allowing users to adjust volume and access various settings menus.

Key configuration options include setting the device address for intercom systems (PF/M1/M2/M3), selecting audio input sources, and restoring factory defaults. The amplifier supports multiple sound quality adjustments such as bass, treble, 8-band equalization with pre-set modes, virtual surround effects, loudness compensation, and channel balance. This manual is written in Chinese.

What's inside

• Description
• Precautions
• Configuration
• Adjustment (Bass/Treble)
• Equalizer Settings
• Virtual Surround Effects
• Display Settings
• Audio Input Selection

Specifications

Frequently asked questions

How do I restore the device to factory settings?

Press and hold the C and - keys simultaneously until the keyboard flashes twice.

What is the maximum volume adjustment range for bass and treble?

The amplifier allows a maximum adjustment of ±20dB for both bass and treble.

Can I use the virtual surround effect with only two speakers?

Yes, this function allows you to achieve a home theater sound field effect using just two speakers.