HD-RA35U

RDL HD-RA35U - 35 Watt Remote Mixer Amplifier, 4 Ohm / 8 Ohm, with Power Supply

The RDL HD-RA35U is a high-efficiency remote mixer amplifier designed for professional AV installations requiring background music, paging, and music-on-hold functionality. It features four audio inputs, two independent amplifier zones (35W and 4W), and remote VCA volume control via RDL wall-mounted controllers. Zone 1 supports 4 Ohm or 8 Ohm speakers, while Zone 2 drives an 8 Ohm speaker or 600 Ohm telephone equipment.

The HD-RA35U automatically enters sleep mode when no signal is present, meeting strict energy-saving standards. Its analog compressor ensures clean, dynamic audio without clipping, even during input overloads up to 20 dB. The unit supports VOX and push-to-talk paging priority and allows integration of external RDL modules for additional processing.

Functionality:

• four audio inputs - two balanced mic/line, two unbalanced stereo RCA
• Inputs 1 and 2: switchable MIC/LINE with 24V phantom power
• Inputs 3 and 4: stereo RCA, summed to mono
• VOX and push-to-talk - automatic/manual ducking of Inputs 2-4
• remote VCA volume control for Inputs 2-4 - compatible with RDL controllers
• bass and treble tone control - for Zone 1 and optionally for line output
• two amplifier outputs: 35W (Zone 1), 4W (Zone 2)
• Zone 1 output: 4 Ohm / 8 Ohm - switch-selectable
• Zone 2 output: 8 Ohm / 600 Ohm MOH
• balanced line-level output - for further processing or amplification
• dual-mono RCA output - for other audio devices
• analog compressor - preserves dynamics, prevents clipping
• automatic sleep mode - configurable delay, energy saving
• 24 V DC power supply included

Features:

• high-efficiency Class D operation - minimal heat generation
• external module support - filtering, isolation, transmission
• compressor LED indicator - visual feedback for clipping protection
• power LED - standby/active status indication
• thermal and short-circuit protection - reliable AV performance
• soft-start/stop - no clicks or pops during power transitions
• intuitive control - front-panel and remote operation

The RDL HD-RA35U is a versatile and energy-efficient mixer amplifier delivering high-quality audio and advanced control features, ideal for public venues, service facilities, and institutional sound systems.