Shure UABIAST In-Line Power Supply: Complete Product Manual and Guide

Introduction to the Shure UABIAST In-Line Power Supply

The **Shure UABIAST In-Line Power Supply** is a reliable in-line adapter designed to deliver 12V DC bias power over coaxial BNC cable, ensuring seamless operation of active antennas and accessories in professional audio setups. Ideal for wireless microphone systems like Shure QLXD, ULXS4, SLXD, and BLX4R, this power supply solves common issues where receivers lack sufficient antenna input power.[1][2][4] It passes RF signals without interruption while injecting up to 400mA at 12V DC, supporting combinations like three Shure UA834 in-line amplifiers or two amplifiers plus one UA874 active antenna.[1][3][4]

Key benefits include minimal insertion loss (<1 dB), broad frequency range (100–2000 MHz), and 50 Ω impedance for optimal signal integrity.[1][6] With an LED power indicator and included PS24 or PS23US power supply, setup is straightforward for extended cable runs over 25 feet, where in-line amplifiers compensate for signal loss.[1][3] Targeted at live sound engineers, broadcasters, and AV installers, the **Shure UABIAST In-Line Power Supply** enhances antenna placement flexibility in venues, studios, and houses of worship.

Priced around $90–$100, it's widely available from retailers like Crutchfield, CDW, and Shure's official site, with free shipping on orders over $50 and 30-day returns.[2][3][4] This compact device (0.98 x 2.64 x 1.93 inches, 1.73 oz) operates reliably from 45°F to 100°F, making it a must-have for robust **wireless antenna power solutions**.[1][2]

Troubleshooting the Shure UABIAST In-Line Power Supply

Common issues with the **Shure UABIAST In-Line Power Supply** often stem from power or connection problems. If the LED indicator fails to light, verify the PS24 power supply is securely plugged into a wall outlet and the coaxial BNC cable is firmly connected—loose fits can interrupt 12V DC bias voltage.[1][3][5] No RF signal? Check insertion loss by testing cables under 25 feet; add a UA834 amplifier for longer runs to prevent degradation.[1]

Overload errors occur if exceeding 400mA draw (e.g., more than three UA834s at 60mA each or UA874 at higher loads)—power down and reduce devices.[2] For intermittent power, ensure operating temperature stays between −7°C (45°F) and 38°C (100°F).[1] Preventive measures: Use quality RG58 coaxial cables, avoid daisy-chaining beyond specs, and inspect BNC female connectors regularly.

Shure offers a 2-year warranty; contact Expert Tech Support via shure.com or 1-800-323-4669 for replacements. Download the user manual from Shure's site for diagrams.[4][7]

Pros and Cons of the Shure UABIAST In-Line Power Supply

Pros

Versatile Power Delivery: Supplies 12V DC/400mA to up to three devices like UA834 amplifiers or UA874 antennas, perfect for complex wireless setups.[1][4]
Low Signal Interference: <1 dB insertion loss and full RF passthrough across 100–2000 MHz ensure crystal-clear audio.[1][6]
User-Friendly Features: LED indicator confirms power status; includes PS24 supply for immediate use.[3][5]
Excellent Value: At $90–$100, it outperforms generic adapters in reliability and Shure ecosystem compatibility, saving on separate powering needs.[2][3]

Cons

Cable Length Limits: Requires extra UA834 for runs over 25 feet, adding cost (e.g., $200+ per amplifier).[1]
US-Specific Model: UABIAST-US may need regional variants for international voltage.[1]
No Built-in Surge Protection: Relies on quality outlets; alternatives like powered distribution systems offer more safeguards but at higher prices.[2]

Overall, the **Shure UABIAST In-Line Power Supply** delivers superior value for Shure users versus competitors like basic phantom supplies, balancing cost and performance.[1][2]

Customer Reviews and Feedback on Shure UABIAST In-Line Power Supply

Users rave about the **Shure UABIAST In-Line Power Supply**, averaging 4.8/5 stars across pro audio sites. "Solved our UA874 antenna power issue in a 50-foot venue run—LED light is a game-changer," praises a live sound tech.[5] Common praises include reliable 12V bias for multiple UA834s and zero RF dropouts, with one broadcaster noting, "Powers three amps flawlessly in our SLXD system."[2][4]

Minor complaints involve occasional PS24 adapter wear after heavy touring, fixed via warranty. "Wish it had global plugs," mentions an international user, though most recommend it highly: 95% repurchase rate. Addresses key needs for **Shure wireless active antenna power**, earning top marks for pros seeking durable in-line solutions.[3][5]

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