Tube-Tech HLT 2AM – Mastering-Grade Tube Equalizer

The Tube-Tech HLT 2AM is the mastering version of the HLT 2A, featuring stepped potentiometers for precise recall and a refined EQ range tailored for mastering applications. This unit retains the warmth and sonic character of the HLT 2A while offering the accuracy required for critical final-stage processing.

Optimized for Mastering

The HLT 2AM enhances the original design with stepped controls, allowing engineers to apply subtle and precise tonal adjustments. Its finely tuned high and low shelving filters and improved T-filter range provide smoother transitions and greater control over the stereo image.

Key Features

• Stepped Potentiometers – Precision recall for mastering
• Refined Shelf & T-Filter Ranges – More controlled tonal shaping
• All-Tube Push-Pull Amplification – Rich, analog warmth
• Transformer-Balanced I/O – Pristine stereo imaging
• Passive High & Low Cut Filters – Smooth roll-off and natural curves
• Bypass Switches – Per-section and global bypass for seamless A/B comparisons

Technical Specifications

• Low Cut Filters: 18, 25, 40, 60, 85 Hz (6 dB/octave)
• Low Shelving EQ: 18, 37, 80, 180, 370, 800 Hz (±12 dB gain)
• High Shelving EQ: 1, 2, 5, 10, 15, 22 kHz (±12 dB gain)
• T-Filter: 0.5, 1, 2 kHz (+4/-7 dB gain)
• High Cut Filters: 12, 15, 18, 20, 25 kHz (6 dB/octave)
• Input Impedance: >10 kΩ
• Output Impedance: < 60Ω
• CMRR: > 60 dB at 10 kHz
• Low Noise: < -80 dBU at 0 dB gain
• Frequency Response: 5 Hz – 55 kHz (-3 dB)

How Does It Sound?

The Tube-Tech HLT 2AM is a powerful tool for mastering engineers who demand absolute control and sonic integrity. With stepped controls for precise recall, refined shelving and tilt EQ, and the classic Tube-Tech warmth, the HLT 2AM is a mastering-grade equalizer that delivers both musicality and precision.