Shure PA421B-TA – TAA-Compliant 4-Channel PSM Antenna Combiner

Product Overview

The Shure PA421B-TA is a TAA-compliant, four-channel RF antenna combiner built for commercial AV and government installations running multiple Shure PSM wireless personal monitor systems. It combines up to four PSM transmitters onto a single wideband antenna pair (470 to 865 MHz), reducing rack clutter and simplifying RF distribution in broadcast studios, houses of worship, and large commercial meeting spaces. Front-panel LED indicators for signal presence and overload give integrators fast RF troubleshooting at a glance, and the combiner also delivers DC power to compatible IEM transmitters. Because it is manufactured to Trade Agreements Act compliance standards, the PA421B-TA is the correct antenna combiner to specify on government and defense-related AV procurements.

Product Description

Multi-channel wireless monitoring systems quickly become an RF management problem once a facility runs more than one or two PSM transmitters — each additional transmitter typically needs its own antenna pair, which eats rack space and multiplies the number of coax runs an integrator has to manage. The PA421B-TA antenna combiner solves this by actively combining up to four Shure PSM transmitters onto a single antenna set across the wideband 470 to 865 MHz carrier frequency range, so a broadcast studio or commercial AV installation can scale wireless IEM channels without scaling antenna hardware one-to-one. Each of the four BNC inputs has its own signal-presence LED (illuminated green when active) and overload indicator, giving AV technicians a quick visual health check of the RF chain during setup, soundcheck, or live troubleshooting. A quiet, temperature-sensitive fan keeps the internal RF electronics cool during extended operation, which matters in rack rooms and broadcast control rooms that run for hours at a stretch. The PA421B-TA also supplies DC power directly to compatible Shure IEM transmitters through its combiner outputs, cutting down on separate power supplies at the rack. Two PA421B-TA units can be daisy-chained to expand combining capacity for larger wireless deployments, which is common in broadcast studios and large commercial meeting spaces running eight or more IEM channels. Because this SKU is a made-to-order, TAA-compliant model, it carries a 2 to 4 week typical lead time and a price premium versus the standard PA421B, reflecting the cost of the separate compliant production run. AV integrators specifying wireless monitoring for government facilities, defense contractors, and other Buy American-restricted projects should pair this combiner with other TAA-compliant Shure PSM hardware to keep the full RF distribution chain compliant.

Key Features

• Optimizes RF Management — Consolidates multiple PSM transmitter feeds onto one antenna set to reduce interference and rack clutter.
• Combines Up to Four PSM Transmitters — Scales wireless IEM channel count without one-to-one antenna hardware growth.
• LED Indicators for Signal Presence — Four input LEDs show active signal and overload status for fast RF troubleshooting.
• Daisy-Chain Up to Two Combiners — Expands combining capacity for larger broadcast and commercial installations.
• DC Power to IEM Transmitters — Supplies power directly to compatible transmitters, reducing separate power supply requirements.
• Quiet Temperature-Sensitive Fan — Keeps internal electronics cool during extended operation in rack rooms.
• TAA-Compliant Manufacturing — Meets Trade Agreements Act sourcing rules for government and defense AV procurement.

Typical Applications

• Broadcast studio
• House of worship
• Commercial meeting space (multi-channel wireless monitoring)
• Government space

Technical Specifications

Frequently Asked Questions

Which Shure PSM transmitters is the PA421B-TA compatible with?
The PA421B-TA combines up to four Shure PSM wireless transmitters operating within its 470 to 865 MHz carrier frequency range, including PSM series half-rack transmitters such as the Shure P9T.

Can I combine more than four transmitters?
Yes. Two PA421B-TA combiners can be daisy-chained together to expand total combining capacity for larger broadcast or commercial deployments.

How do the LED indicators help with installation?
Each of the four inputs has a signal-presence LED that lights green when an active transmitter is detected, plus an overload indicator, so integrators can verify each RF connection during commissioning without additional test equipment.

Does the PA421B-TA need external power for connected transmitters?
No separate power supply is required for compatible IEM transmitters — the combiner delivers 15 VDC directly through its outputs, up to 660 mA per output.

Why is this model more expensive than the standard PA421B?
The PA421B-TA is a made-to-order, TAA-compliant model variation, and the added cost of producing a separate compliant production run is reflected in the price versus the standard PA421B.

What is the lead time on a TAA-compliant order?
TAA-compliant SKUs, including the PA421B-TA, typically ship in 2 to 4 weeks rather than from immediate stock.

Is this combiner rack-mountable?
Yes, the PA421B-TA is designed for standard equipment rack installation alongside PSM transmitters and other wireless system components.

Does Shure warranty the PA421B-TA?
The PA421B-TA carries Shure's standard manufacturer warranty; contact Creation Networks support for current terms and RMA assistance.