RF Venue COMBINE8 – 8-Channel IEM Transmitter Combiner

Product Overview

The RF Venue COMBINE8 is an 8-channel active IEM transmitter combiner that consolidates up to eight in-ear monitor transmitter signals into a single, more effective transmit antenna. By eliminating the need for multiple individual antennas per transmitter, the COMBINE8 reduces physical clutter, lowers intermodulation distortion, and improves overall IEM system reliability. Compatible with all brands of unlicensed IEM transmitters operating in the UHF TV band at 50 mW or less, the COMBINE8 is the standard infrastructure component for professional multi-channel IEM deployments.

Product Description

In multi-channel IEM deployments, transmitters from all manufacturers are typically configured to output at the lowest practical power level to minimize intermodulation between channels. However, running eight transmitters at minimal power with individual antennas placed near the rack — often far from performers — compromises signal reliability. The COMBINE8 addresses this by combining all eight transmitter outputs into a single coaxial connection that feeds one high-gain antenna positioned optimally toward the stage.

The COMBINE8’s active combining circuitry provides a 65% improvement in total harmonic distortion over a comparable 4-channel system, while maintaining output compatibility with all IEM manufacturers’ receiver systems. An LED indicator on the front panel activates when any input signal exceeds the +5 dBm threshold, providing a quick visual check that transmitters are properly connected and powered during setup.

A significant operational benefit is the DC Octopus cable, included with the COMBINE8. This 8-connector power distribution cable allows the COMBINE8’s 12 VDC, 4 A output to power up to eight compatible IEM transmitters directly, eliminating individual wall warts or power adapters at each transmitter position. This single-cable power distribution approach reduces rack cable density and simplifies IEM rack maintenance.

The COMBINE8 is compatible with any IEM transmitter — analog or digital — operating in the UHF TV band at 50 mW or less, regardless of manufacturer. It operates from 100–240 VAC for worldwide compatibility and is designed as a permanent rack component in both fixed installed and touring IEM systems.

Key Features

• 8-Channel Active Combining — Combines up to 8 IEM transmitters into a single antenna output with 65% lower THD than a comparable 4-channel system.
• LED Overload Indicator — Front panel LED activates at >+5 dBm input for quick connection verification during setup.
• DC Octopus Cable Included — Powers up to 8 compatible IEM transmitters from the COMBINE8’s 12 VDC output, eliminating individual wall warts.
• +18 dBm Max Input — Handles IEM transmitters at up to 60 mW per port without overloading.
• Universal IEM Compatibility — Works with all brands and models of unlicensed IEM transmitters in the UHF TV band, analog or digital.
• 100–240 VAC Power — Worldwide-compatible power supply for international touring and fixed installations.
• 1RU Rackmount — Standard 19-inch rack mounting in the same unit width as professional wireless audio equipment.

Typical Applications

Suitable for:

• Live performance venues with 2–8 IEM users requiring a professional transmitter combining solution
• Houses of worship with full band on in-ear monitors
• Touring productions requiring reliable multi-channel IEM transmitter infrastructure
• Broadcast studios and television production with talent IEM distribution
• Auditoriums and multi-purpose rooms with installed IEM systems

Technical Specifications

Frequently Asked Questions

What is the benefit of using the COMBINE8 versus individual antennas for each IEM transmitter?

Individual transmit antennas placed near the rack introduce intermodulation between adjacent channels and provide poor coverage to performers far from the rack. The COMBINE8 consolidates all signals into a single output feeding a high-gain antenna — such as the CP Beam or CP Architectural Antenna — positioned optimally toward the stage. This approach reduces intermodulation, improves signal coverage, and eliminates the antenna farm created by multiple individual antennas.

Is the COMBINE8 compatible with digital IEM transmitters?

Yes. The COMBINE8 works with analog and digital IEM transmitters operating at 50 mW or less in the UHF TV band, including digital systems from Shure (PSM series), Sennheiser, Lectrosonics, and other manufacturers.

Can the DC Octopus cable power all 8 IEM transmitters simultaneously?

The DC Octopus cable provides 8 individual DC connectors from the COMBINE8’s 12 VDC, 4 A output. Whether all 8 transmitters can be powered simultaneously depends on the DC power draw of the connected transmitters. Verify each transmitter’s power requirements before relying on the DC Octopus for all 8 positions.

What antennas can be used with the COMBINE8?

The COMBINE8 antenna output (BNC female) is compatible with any 50-ohm IEM transmit antenna. RF Venue offers the CP Beam (directional, 9 dBd gain), CP Stage (weather-resistant, IP-rated), and CP Architectural Antenna (wall/ceiling mount) as recommended pairings. Bundle configurations including these antennas are available as COMB8CPB, COMB8CP-STAGE, COMB8CP-ARC, and COMB8CP-ARCB.

What is the maximum number of IEM channels the COMBINE8 supports?

The COMBINE8 supports 8 IEM transmitter channels in a single 1RU unit. For systems requiring more than 8 channels, multiple COMBINE8 units each feeding a separate antenna, or the 6-channel COMBINE6 HDR cascade (which supports 12 channels in 1 RU), provide additional options.

What warranty covers this product?

The RF Venue COMBINE8 is covered by a manufacturer warranty. Contact Creation Networks at creationnetworks.net for warranty registration and support.