NTP 179-400 Limiter incl. Eurorack, MS-cards and Danica power supply

Up for sale is a world-class, broadcast-grade analog processing package featuring a rare NTP 179-400 Stereo Limiter, two Rostec Engineering EMS2 Rev 1 MS/LR Converters, and an NTP 4-34396 Relay Card—all housed in a premium rack enclosure with a dedicated power supply.

Known for their incredible precision, transparency, and legendary Danish broadcast engineering, NTP limiters are a secret weapon for mastering, mix-bus gluing, or tracking. With the included Rostec MS converters and the NTP routing relay card, this package has all the foundational components to build an ultimate, customized Mid-Side mastering matrix.

What’s Included:

• NTP 179-400 Limiter Module: Fully operational, configured for pristine stereo operation.
• Eurorack Type 4-40425 Housing: High-quality, solid enclosure housing the components.
• Modern I/O: Fully wired with standard XLR Inputs and Outputs on the rear for plug-and-play integration into your modern studio workflow.
• Danica TPS 3052 E Power Supply: A robust linear power supply delivering a rock-solid, clean 24V @ 2.5A to keep the circuitry running quietly.
• Bonus Rostec Engineering EMS2 Rev 1 MS/LR Cards (x2): High-end Mid-Side conversion cards. They are currently installed in the rack frame and successfully power/light up, but they are not currently wired into the audio circuit (see condition notes below).
• Bonus NTP 4-34396 Relay Card (4 x 2): A high-reliability broadcast switching/routing relay card, excellent for configuring a true hard-bypass or input/output matrix. (Unconnected/Untested).

Condition & Functionality

• Main Limiter & PSU: The main NTP 179-400 limiter unit, the Eurorack enclosure, and the Danica power supply are fully operational, sound incredible, and pass clean stereo audio via the rear XLRs. Cosmetically, it shows minor signs of studio rack wear appropriate for its age, but it has been very well maintained.
• Rostec EMS2 & NTP Relay Cards: These additional cards are being sold as-is / project stock. While the Rostec cards successfully receive power and light up when the unit is turned on, neither the MS cards nor the relay card are currently wired into the audio path. They represent an amazing upgrade opportunity for a tech-savvy buyer or tech to wire up a highly sophisticated custom console, but they are not guaranteed to pass audio in their current state.

Technical Specifications

• Limiter Manufacturer: NTP Elektronik (Denmark)
• Limiter Model: 179-400 (Analog Peak Limiter / Compressor)
• MS Cards: Rostec Engineering EMS2 Rev 1 (Mid-Side / Left-Right Converters)
• Relay Card: NTP Type 4-34396 (4 x 2 Matrix Relay Card)
• Channels: Stereo / Expandable to MS and Custom Routing
• Connectivity: XLR In / XLR Out (For main NTP path)
• Power Supply: Danica TPS 3052 E (24V, 2.5A)

Shipping & Terms

The unit will be packed with professional care, heavily bubble-wrapped, and double-boxed to ensure safe arrival. Insured shipping with tracking will be used.

Because this is a vintage, partially customized item, it is sold as-described. Please view the photos closely and ask any questions before purchasing!