Sennheiser AC 3200-II – Active 8:1 Antenna Combiner

Product Overview

The Sennheiser AC 3200-II is an active, high-power 8:1 antenna combiner that consolidates the RF outputs of up to eight in-ear monitor transmitters onto a single antenna. Designed for large wireless monitoring systems, this rack-mount antenna combiner reduces intermodulation between channels and simplifies the RF distribution of multi-channel in-ear monitoring rigs. A broadband 500–870 MHz range and per-channel linear amplification make it a reliable backbone for touring, broadcast, and large commercial AV installations.

Product Description

The AC 3200-II is purpose-built for the Sennheiser 2000-series rack-mount monitor transmitters and other UHF IEM transmitters, combining up to eight signals for transmission through one shared antenna. In multi-channel systems it is an indispensable tool for efficiently reducing intermodulation products between transmission channels, which protects audio clarity as channel counts grow. Linear power amplifiers handle up to 100 mW per channel without loss, and a per-channel LED provides an at-a-glance system overview for engineers.

Housed in a single rack unit (1 RU), the combiner installs cleanly into a monitoring rack alongside transmitters and antenna distribution. It ships with the NT 12-125D external power supply and international mains cables, so integrators can deploy it in permanent installs or portable racks. For AV system designers building scalable in-ear monitoring for auditoriums, houses of worship, and broadcast studios, the AC 3200-II centralizes RF transmission and keeps antenna placement simple. Pair it with the Sennheiser A 5000-CP directional antenna and feed Sennheiser EW IEM G4 monitoring systems. Explore more RF distribution hardware in our Sennheiser collection.

Key Features

• 8:1 Signal Combining — Combines up to eight transmitter outputs for transmission through a single antenna.
• Intermodulation Suppression — Significantly reduces intermodulation products between connected transmitters in dense multi-channel systems.
• Linear High-Power Amplification — Handles up to 100 mW per channel without loss for full-strength transmission.
• Broadband 500–870 MHz Range — Covers a wide UHF span for flexible frequency coordination.
• Per-Channel LED Monitoring — Provides a clear, real-time overview of each combined channel.
• 1 RU Rack-Mount Design — Integrates cleanly into monitoring and RF distribution racks.
• Included Power Supply — Ships with the NT 12-125D PSU and EU/UK/US mains cables for immediate deployment.

Typical Applications

• Large-scale in-ear monitoring for auditoriums and performance venues
• Houses of worship running multi-channel wireless monitoring
• Broadcast studios and production facilities
• Touring and portable monitoring racks
• Government and commercial multi-purpose rooms with complex RF systems

Technical Specifications

Frequently Asked Questions

Which transmitters is the AC 3200-II designed for?
It is designed for Sennheiser 2000-series rack-mount monitor transmitters and compatible UHF IEM transmitters, combining up to eight onto one antenna.

Are BNC interconnect cables included?
No. BNC interconnect cables between transmitters and the combiner are not included and should be specified during system design.

How does it reduce intermodulation?
By actively combining channels through linear amplifiers, it significantly suppresses intermodulation products that occur when multiple transmitters share an antenna.

How much rack space does it require?
The unit occupies a single rack unit (1 RU) and mounts in a standard 19" rack.

Does it need an external antenna?
Yes. The combiner feeds a single transmit antenna such as a directional circularly polarized model for optimal coverage.

What warranty and support are available?
It carries Sennheiser's professional manufacturer warranty. Contact our AV team for RF system design assistance and current warranty terms.