Sennheiser 509293 – Spectera MADI Card BNC
Sennheiser 509293 – Spectera MADI Card BNC is backordered and will ship as soon as it is back in stock.
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Product Overview
The Sennheiser 509293 is the BNC variant of the Spectera MADI Card, an optional expansion card that adds MADI audio I/O to the Spectera Base Station. It installs into the base station's expansion slot and provides MADI (AES10) connectivity over two coaxial BNC connectors. As a Spectera MADI expansion card, it lets integrators tie the base station's 32-in / 32-out audio into MADI-based infrastructure for broadcast and large-venue routing. It also supports optional redundant MADI audio I/O as part of Spectera's built-in redundancy features.
Product Description
This MADI card is an official Sennheiser accessory for the Spectera Base Station, the central 1RU hardware of the Spectera bidirectional wireless platform. It adds a coaxial MADI interface to the base station, carrying up to 32 input and 32 output channels over the AES10 MADI standard.

The BNC variant terminates in two BNC connectors for coaxial MADI cabling, the common choice in broadcast and many touring infrastructures. By adding MADI alongside the base station's standard Dante networking, the card gives integrators a second, independent audio transport, and it can be configured for redundant MADI audio I/O so a single transport failure does not interrupt the signal path. The card installs into the base station's expansion slot, keeping all I/O consolidated within the 1RU chassis. For facilities already standardized on coaxial MADI, this card is the direct way to bring Spectera's 64-channel wireless capacity into the existing audio network. Sennheiser also offers an OM (optical multimode) variant of the MADI card for installations that use fiber-based MADI runs.
Key Features
- MADI Expansion — The card adds MADI (AES10) audio I/O to the Spectera Base Station for 32 in / 32 out connectivity.
- Dual BNC Connectors — Two BNC connectors support coaxial MADI cabling common in broadcast and touring infrastructure.
- Redundant MADI Support — The card can be configured for redundant MADI audio I/O as part of Spectera's built-in redundancy.
- Slot-In Installation — The card installs into the base station's expansion slot, keeping all I/O within the 1RU chassis.
- Network Flexibility — MADI complements the base station's standard Dante networking with a second, independent audio transport.
- Genuine Sennheiser Accessory — This is an official Spectera expansion card for consistent fit and performance.
Technical Specifications
| Manufacturer Part Number (SKU) | 509293 |
| Product Type | Wireless Microphone Systems (Expansion Card) |
| Function | MADI (AES10) audio I/O expansion card |
| Connectors | 2x BNC (coaxial MADI) |
| Channels | 32 in / 32 out |
| Redundancy | Supports redundant MADI audio I/O |
| Variant | BNC (OM optical variant also available) |
| Compatibility | Sennheiser Spectera Base Station |
| Brand | Sennheiser |
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