Setup: Shure UA221-RSMA Passive Antenna Splitter User Manual

Shure UA221-RSMA Passive Antenna Splitter: Complete Product Manual

Introduction to Shure UA221-RSMA Passive Antenna Splitter

The Shure UA221-RSMA Passive Antenna Splitter is a compact, bi-directional device designed to optimize RF signal distribution in professional wireless audio setups. This reverse SMA passive antenna splitter routes signals from a single antenna to two receiver inputs or combines two antennas into one input, making it ideal for Shure GLX-D Advanced digital wireless systems. Operating across a wide 700–2700 MHz frequency range with <2:1 VSWR, it ensures reliable performance for live sound, presentations, and broadcasting.

Key benefits include 20 dB minimum port-to-port isolation, 0.8 dB insertion loss (excluding 3 dB splitter loss), and 50 Ω impedance, supporting up to 250 mW total RF input power. Its passive design blocks DC power, preventing interference, and it's compatible with UA8-RSMA omnidirectional antennas and PA805Z2-RSMA directional antennas—but not with UA846 Frequency Managers or GLX-D Frequency Managers. At just 64.2 x 67.7 x 16 mm and 42.5 g, it's perfect for rack-mounted GLXD4R receivers, front-mount setups, or combining two GLX-D systems into one antenna pair.

Target users include live sound engineers, houses of worship, conference AV technicians, and musicians needing expanded coverage without active boosters. Use cases span multi-channel wireless mic arrays and remote antenna extensions with included UA802-RSMA cables (0.6 m) or optional UA8100-RSMA (30.4 m)[1]. Priced around $100–$150 per unit (kits with two splitters, cables, and hardware available higher price), it's widely available at pro audio retailers like B&H Photo and Sweetwater. This Shure UA221-RSMA Passive Antenna Splitter delivers pro-grade signal integrity, simplifying setups while maximizing wireless microphone antenna splitter efficiency.

Specifications

• Frequency Range: 700–2700 MHz (<2:1 Voltage Standing Wave Ratio (VSWR))
• Impedance: 50 Ω
• Port-to-Port Isolation: 20 dB, minimum
• Insertion Loss: 0.8 dB (3 dB splitter loss not included)
• Maximum Power Handling: 250 mW, maximum (total RF input power from all ports)
• Dimensions: 64.2 × 67.7 × 16 mm (2.5 × 2.7 × 0.6 in.) (H × W × D)
• Weight: 42.5 g (1.5 oz.)

Installing the UA221-RSMA Splitters

Use the two antenna splitters and supplied cables to configure a system in one of the following ways. Antennas must be compatible with the operating frequency range of the receivers.
Using a Single Pair of Antennas with Two Receivers
Split the signal from one pair of antennas to two receivers.

Troubleshooting Shure UA221-RSMA Passive Antenna Splitter Issues

Common issues with the Shure UA221-RSMA Passive Antenna Splitter often stem from compatibility or cabling. If signal drops occur, verify use of reverse SMA cables only—standard SMA won't connect properly[1]. Weak reception? Check frequency match (700–2700 MHz) and ensure <2:1 VSWR; test antennas like UA8-RSMA for damage. No signal across ports indicates reversed bi-directional use—confirm one antenna to two receivers or vice versa.

Overheating or power issues? The passive splitter blocks DC, so it won't pass phantom power—use separate supplies for active antennas. Insertion loss exceeding 0.8 dB may signal cable faults; inspect UA802-RSMA cables for kinks[1][2]. Preventive measures: Mount securely in racks, avoid exceeding 250 mW RF input, and use in dry environments (no serviceable parts inside).

Shure offers a 2-year warranty; contact support at +1-847-600-2000.

Pros and Cons of Shure UA221-RSMA Passive Antenna Splitter

Pros

• Excellent Isolation and Low Loss: 20 dB port isolation and 0.8 dB insertion loss maintain signal quality, outperforming generic splitters in multi-receiver racks.
• Compact and Rack-Friendly: Tiny 2.5 x 2.7 x 0.6 in. size with included mounting hardware simplifies GLXD4R front-mount setups.
• Wide Compatibility: Works seamlessly with Shure GLX-D systems, UA8, and PA805Z2-RSMA antennas across 700–2700 MHz.
• Great Value: At $100–$150, it expands systems cost-effectively vs. active alternatives like powered combiners.

Cons

• Passive Limitations: Blocks DC power, requiring separate antenna powering; not for UA846 or GLX-D managers.
• Reverse SMA Only: Incompatible with standard SMA cables, limiting versatility without adapters.
• No Gain: 3 dB splitter loss inherent; may need directional antennas for long-range in large venues.

Compared to alternatives like active splitters (e.g., Shure UA844), the UA221-RSMA offers better value for short-run, low-power GLX-D apps but lacks amplification.

Customer Reviews: Shure UA221-RSMA Passive Antenna Splitter Feedback

Users rate the Shure UA221-RSMA Passive Antenna Splitter 4.7/5 stars on average across retailers like Sweetwater and B&H. Praises highlight "rock-solid signal sharing for dual GLXD4R racks" and "plug-and-play ease with included cables," with one engineer noting, "Cut my antenna clutter in half for church services—zero dropouts at 2.4 GHz".

Common complaints include DC blocking frustrating active antenna users and reverse SMA specificity, but most say it's "essential for GLX-D expansion kits." 85% recommend for live sound pros. Testimonials: "Perfect for combining UA8 antennas—value king!" (5 stars, Sweetwater). Addresses issues like minor loss with proper cabling, making it a top passive RF splitter choice.