Sennheiser GZL 9000-A20 N connection cable, low attenuation, length: 20 m

Sennheiser GZL 9000-A20 Low-Attenuation N-Connector RF Cable (20 m)

The Sennheiser GZL 9000-A20 (Article Number: 505457) is a professional, broadcast-grade coaxial RF connection cable engineered for high-end wireless audio networks. Measuring exactly 20 meters (approx. 65.6 feet) in length, this premium double-shielded cable is designed to route radio frequency signals over long distances while maintaining ultra-low attenuation (signal loss).

Terminated at both ends with heavy-duty N-type coaxial connectors, the GZL 9000-A20 serves as the primary structural link to connect remote, directional active antennas to Sennheiser's flagship digital infrastructure, including the Digital 9000 (EM 9046) and Digital 6000 wireless receiver systems.

Key Technical and Structural Attributes

• Premium Low-Attenuation Matrix: Engineered with high-grade dielectric insulating layers and heavy physical shielding to combat high-frequency insertion loss. It preserves RF signal strength over a 20-meter run, keeping the signal-to-noise ratio immaculate before it enters the receiver.

• Heavy-Duty N-Type Interface Nodes: Fitted with threaded, industrial-grade N-connectors on both ends. This design provides superior RF shielding, lower impedance mismatch, and far greater physical weatherproofing compared to standard consumer BNC connections.

• Flagship Infrastructure Ecosystem: Fully optimized to interface with specialized active/passive antenna components like the A 9000, AD 9000, and AB 9000 antenna systems, allowing remote antenna placement far away from the master equipment rack.

• Tour-Grade Outer Jacket: Wrapped in a rugged yet highly flexible outer jacket that resists twisting, crushing, and extreme environment degradation on large arena festival stages, stadium broadcast trucks, and theater flies.

Technical Specifications Matrix

In the Box: Component Inventory

• 1 x Sennheiser GZL 9000-A20 20-Meter Coaxial N-Connector Antenna Cable

Field Configuration and RF Distribution Advice

Managing Automatic Cable Loss Compensation: When connecting the GZL 9000-A20 to a Sennheiser active antenna system (such as the AD 9000 directional antenna or AB 9000 booster), the smart circuitry inside the Digital 9000/6000 receiver scans and communicates with the system. It automatically calculates the physical loss introduced across this 20-meter run and boosts the headward active amp module by the exact necessary decibel margin (up to 14 dB) to guarantee absolute baseline RF calibration.

Proper Coaxial Handling and Bend Radius: Never pinch, step on, or clamp this low-loss cable tightly into sharp corners. Coaxial cables rely on a perfect, round geometric distance between the center copper conductor and the outer shield matrix to maintain 50 Ohm impedance. Bending the cable beyond its safe minimum bend radius (typically 5 to 6 times the cable diameter) will cause structural deformation, leading to a permanent impedance drop and severe RF signal reflection at the desk.