NTP Siemens (Paul Grzybg / Classic Audio Services) Racked pair 179-120 compressors and 811 453 line amps 1990s - black

Up for sale is a truly elite, turn-key analog mastering system featuring a pristine, matched pair of legendary mid-1970s NTP 179-120 Stereo/Dual-Mono Compressors, perfectly integrated with a pair of highly coveted discrete Siemens WSW K.Nr. 811 453 Line/Normalization Amplifiers. This entire system was custom-built, racked, and calibrated by the renowned Paul Grzybg at Classic Audio Services (Apple Valley, CA). Known for uncompromising, mastering-grade execution, this build completely bypasses the headaches of raw European card-edge modules and delivers a plug-and-play powerhouse with standard XLR I/O.The Sonic Chain & Features: The Compression Stage: Two matched NTP 179-120 modules—famous as the historic "secret weapon" stereo bus compressors utilized by legendary engineers like Bob Ludwig and Howie Weinberg. They provide an unrivaled analog "glue," adding weight, punch, and an ultra-smooth finish to the mix bus or mastering chain. The Output Makeup Stage: Mounted directly above the compressors are two discrete Siemens WSW 811 453 line amplifiers. Offering up to 30dB of incredibly musical variable gain, they utilize the exact input/output transformers found in the mythical WSW 811 403 mic preamps. They act as the perfect transformer-balanced analog makeup stage to restore level after heavy compression while introducing massive sonic authority. Mastering Layout & Metering: Features dual dedicated mechanical VU meters calibrated for accurate signal monitoring, independent left/right hard-bypass switches, and precision center-mounted controls. Build Quality: Housed in a heavy-duty, professionally finished black anodized rack chassis with clean internal linear power delivery. Condition & Provenance: The faceplate, knobs, and switches are in excellent aesthetic and functional condition. To preserve the immaculate calibration and wiring integrity of Classic Audio Services, the chassis remains completely sealed and undisturbed!!! Shipping & Handling: Due to the high-value, heavy-duty nature of this vintage mastering system, it will be meticulously packed, double-boxed, and shipped via fully insured carrier services only. Local pickup is also welcome. Happy to negotiate shipping - please do so before buying! I have to cover some unforeseen vet bills and unfortunately have to let this piece go as I’m moving over to more compact digital solutions for when I have time to record. Thanks for looking! Hope this can find its way to a good home!