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Note: This item may not be returnable or could require a restocking fee. Contact one of our Audio Consultants for more details. Due to the special nature of this item, we order each unit fresh from the factory, exclusively for you! Lead times may vary so please chat, call or email for up-to-date inventory status.



NTP Technology Penta 721s-SDI Dual SDI to Dante Converter with SRC

Compact 1U digital audio interface with a dual set of 3G SDI input/output ports, Pro|Mon and dual power supply providing embedding and de-embedding of 16 audio channels per port where sample rate conversion can be enabled if desired


Product Description

The NTP Technology Penta 721s-SDI is a dual SDI embedder/de-embedder with onboard sample rate converter, MADI, AES and Dante, which provides a versatile and flexible solution for signal distribution of embedded audio via AES/EBU, MADI, as well as routing via IP Gigabit Ethernet and optical fibre networks.

Penta 721s-SDI is a compact 1U digital audio interface with a dual set of 3G SDI input/output ports, Pro|Mon and dual power supply. It provides embedding and de-embedding of 16 audio channels per port where sample rate conversion can be enabled if desired.

All embedded channel can be routed to and from any of the digital interfaces on the unit. It comes with eight channel AES/EBU input/output channels, MADI and Dante IP Audio Ethernet in/outs, as well as an optional mini-module slot with dual SFP MADI optical in/out connection.

The Penta 721s-SDI includes:

  • Fitted with 64 Dante/AES67 Brooklyn 2 module
  • Expansion slot fitted with Dual SDI Embedder/De-Embedder
  • Dual MADI Option Slot


Penta 721s-SDI include a 512x512 multiplexer, enabling all SDI audio and digital inputs and outputs to be routed in any combination; this enables the unit to also split signals for advanced signal distribution.

The multiplexer can be used to establish the static connections of the signal inputs and outputs. A 256x32 channel summing mixer is also available as a part of the matrix.


Penta 721s-SDI is controlled via one or two Ethernet ports and the operation is done by using the DADman control software application or a Penta 615 Control panel. In larger router systems control can be made via the NTP RCCore Router control application.


The Penta 721s-SDI IP Audio protocol is based on the robust tried-and-tested Dante digital audio networktechnology, and will interoperate with products of other brands that comply with Dante. The Dante IP Audio format provides fast, flexible, andeconomical audio routing via IP and is compatible with NTP PENTA 721 Digital I/O and other Dante devices.

The IP Audio routing provides Low latency, tightly synchronized, transport of uncompressed audio over Gigabit IP Ethernet Layer 3 networks using off the shelf switches, and routers for audio routing via one or more sub-nets. A total of 512 channels can be routed on a 1 Gigabit network, and more if the network capacity is higher.


  • Flexible patching and routing of SDI audio channels
  • Clock detach between SDI audio and video
  • Standalone Dante IP audio interface and format converter
  • Compact solution with redundant power supply
  • 2x SDI embedder/de-embedder
  • 16 channels per SDI
  • Supports SD, HD and 3G SDI
  • Built-in Sample Rate Converter
  • Routing of single channels
  • 8 AES/EBU I/O and 1 BNC MADI I/O
  • Optional Mini module with 2 MADI I/O via SFP
  • Pro|Mon monitor control functionality
  • 64 Dante IP audio I/O channels
  • Support for AES67 with SAP
  • TCP/IP control via DADman software, Penta 615 control panels or the NTP RCCore control system

Product Specifications

Condition New
Chassis 19-inch Rack-mount
Rack Spaces 1U
Input Connectors AES/EBU DB25, AES/EBU XLR, BNC, Ethernet
Output Connectors AES/EBU DB25, BNC, Ethernet
Clock I/O In, Out
Digital Format AES/EBU, Dante, MADI

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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