UREI 1178 – Classic Stereo Peak Limiter / Compressor

Up for sale is a classic UREI 1178 stereo peak limiter/compressor, freshly restored and calibrated. This overhaul was strictly purposeful, avoiding unnecessary or arbitrary modifications: the primary goal has been the essential replacement of aged components due to natural wear over time, complemented by strategic modern improvements—all while strictly preserving its original sonic character.

Key Overhauls & Upgrades:

• Preventive Nichicon Recap & MKP Decoupling: Complete replacement of aging electrolytic capacitors with high-grade Nichicon parts. Capacitance was increased in key stages following Jim Williams (Audio Upgrades) recommendations, plus high-precision MKP film bypass capacitors added to the signal path for enhanced transparency.
• Precision Multi-Turn Trimmers: Internal trim pots replaced with multi-turn units for exact bias, symmetry, and channel balance calibration.
• 100% Original Audio Path: Original FET gain reduction and Signetics op-amps left completely untouched to preserve the sonic character of this unit.
• Thermal & Power Optimization: VU meter lamps and power indicator upgraded to low-draw LEDs, reducing thermal load and leaving higher power headroom for the audio circuitry.
• Flawless Frequency Response & Channel Matching: Completely flat frequency response with zero measurable variance between channels during operation.
• Improved low-frequency stability and excellent inter-channel phase coherence.
• Real-world verified: tested over several weeks inserted on a studio master bus, widely praised by the house engineers.
• Possibly the best-condition UREI 1178 on the market. An investment that increases in value every year.