Siemens Sitral U274 Vintage German Broadcast Limiter / Diode Clipper Module (Tested & Fully Functional)

Up for sale is a rare and highly sought-after Siemens Sitral U274 vintage broadcast limiter / diode clipper module, manufactured in Germany during the golden era of German radio and studio engineering.

Sourced directly from a professional vintage Siemens mixing console which was used for broadcasting in Germany until 1999 (see pictures). 

This unit features discrete Germanium/Silicon circuitry and Haufe transformers, offering that signature thick, warm, and musical vintage broadcast sound.

The module has been bench-tested and verified in a working environment.

Tested via frequency sweep analysis (FuzzMeasure). It exhibits a rock-solid, flat frequency response from 50 Hz well past 20 kHz with no high-end roll-off.

Please note that the U274 delivers a robust, high-output studio signal. When connecting to modern DAW interfaces, using a passive DI box or external attenuation (pad) is recommended to properly match input headroom.

Good vintage condition with expected minor signs of wear on the front panel from rack mounting and age (please refer to the high-resolution photos).

General Features:

- Original Siemens Sitral cassette format

- High-grade balanced input and output transformers (Haufe)

- Fast diode-clipping / limiting behavior, ideal for drum busses, vocal levelling, or aggressive sound shaping

- Designed for standard +24V DC power supply

See other Sitral cassettes out of this mixing console in my other listings!

Worldwide Express Shipping: Packed with extreme care in heavy-duty padding and sturdy cardboard boxes.

Tracked & Insured: Ships with full insurance and tracking number via DHL / Premium Postal Services.

Import Duties & Taxes: Buyer is responsible for any applicable customs duties or import taxes in their respective country.

Sold as-is due to the vintage nature of broadcast electronics, but guaranteed to arrive as described and tested.

If you have any questions or require additional technical details, feel free to send a message!