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[1][2][3].

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[1][3][4]. 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[3].

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), 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[2][6].

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[1][3]. No signal across ports indicates reversed bi-directional use—confirm one antenna to two receivers or vice versa[1].

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)[1].

Shure offers a 2-year warranty; contact support at +1-847-600-2000 or info@shure.com for RMA. Download the user guide from Shure's site for diagrams. Regular checks prevent 90% of issues, ensuring seamless **GLX-D antenna splitter** operation[1].

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[1][2].
Compact and Rack-Friendly: Tiny 2.5 x 2.7 x 0.6 in. size with included mounting hardware simplifies GLXD4R front-mount setups[1][3].
Wide Compatibility: Works seamlessly with Shure GLX-D systems, UA8, and PA805Z2-RSMA antennas across 700–2700 MHz[3][4].
Great Value: At $100–$150, it expands systems cost-effectively vs. active alternatives like powered combiners[2][6].

Cons

Passive Limitations: Blocks DC power, requiring separate antenna powering; not for UA846 or GLX-D managers[1][3].
Reverse SMA Only: Incompatible with standard SMA cables, limiting versatility without adapters[1].
No Gain: 3 dB splitter loss inherent; may need directional antennas for long-range in large venues[1].

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[1].

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"[2][6].

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[3][6].

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