Manley Nu Mu® – Stereo Limiter/Compressor

The Manley Nu Mu® is a high-end all-tube stereo limiter/compressor designed for mastering and mix bus applications. Known for its musical compression and smooth limiting characteristics, the Nu Mu® is revered for adding analog warmth and presence while providing transparent dynamic control. Featuring a dual mono design, the Nu Mu® is perfect for adding analog character to your stereo mixes, providing both transparency and smoothness while maintaining clarity and punch.

The Nu Mu® uses a high-quality optical circuit paired with 12AX7 and 12AT7 vacuum tubes, delivering a smooth, natural sound. It excels at controlling transients without sacrificing detail or musicality, making it an ideal choice for engineers looking for a musical, color-rich compressor for their final mix or mastering chain.

Key Features

• All-tube stereo limiter/compressor with 12AX7 and 12AT7 vacuum tubes
• Musical and transparent compression, perfect for mastering and mix bus applications
• Optical compression circuit for smooth limiting
• Independent threshold, ratio, attack, release, and gain controls
• Bypass and side-chain filter options for precision control
• Classic VU meters for monitoring output level and gain reduction
• Balanced XLR and 1/4″ TRS inputs and outputs
• Bypass switch for easy comparison of compressed vs. uncompressed signals

Technical Specifications

• Channels: 2 (Stereo or Dual Mono)
• Compression Ratio: Variable from 1.5:1 to 10:1
• Attack Time: 5 ms – 50 ms
• Release Time: 0.3 sec – 1.5 sec (program dependent)
• Threshold Range: -20 dBu to +20 dBu
• Input Impedance: 50 kΩ balanced
• Output Impedance: 600 Ω balanced
• THD: < 0.5% at +20 dBu output
• Frequency Response: 20 Hz – 20 kHz (+0/-1 dB)
• Power: 100–240 VAC, 50/60 Hz (universal power supply)
• Dimensions: 2U rackmount (19” x 3.5” x 10”)
• Weight: Approx. 14 lbs (6.4 kg)

Ideal For

• Mastering engineers seeking smooth, musical dynamic control
• Mix engineers looking to add warmth and glue to their stereo bus
• Studios wanting to integrate a flexible, high-quality limiter/compressor into their final mix or mastering chain

The Manley Nu Mu® is the perfect solution for engineers looking to add analog warmth and musicality to their mixes. Whether you’re compressing a vocal, drum kit, or an entire mix, this all-tube stereo limiter/compressor delivers smooth, transparent compression that retains the integrity of your sound while adding vintage analog character.