The Lehmannaudio Black Cube Decade is a solid-state phono stage featuring four switchable gain settings (36-66dB), adjustable input capacitance, a custom impedance slot, and a soft bass filter. It uses a Class A output stage, high-quality components like MKP capacitors, and a separate PWX II external power supply for clean power delivery. The unit has an anodized aluminum faceplate, gold-plated RCA connectors, and studio-grade relays for switching functions.

Key Technical Specifications:

• Gain:Four switchable steps (36dB, 46dB, 56dB, 66dB)
• Input Impedance:47kΩ, 1kΩ, 100Ω, plus one custom slot
• Input Capacitance:Adjustable from 47pF to 1,370pF
• Output Impedance:5 ohms
• Signal-to-Noise Ratio (RMS unweighted):MM: 78dB; MC: 69dB
• Channel Separation:>80dB at 10kHz
• Bass Filter:Soft-Bass-Rolloff at 50Hz, 6dB/octave
• Output Stage:Zero global feedback Class A
• EQ/Filter Implementation:Passive RIAA equalization with high-precision MKP capacitors and studio-grade relays for switching

Power Supply & Construction:

• Power Supply:External PWX II power supply with a 30 VA toroidal transformer.
• Construction:Two-part design with a separate audio section and power supply, housed in non-magnetic aluminum cases.
• Connectors:Gold-plated RCA connectors for audio and a gold-plated Neutrik connector for the power supply connection.

Features & Performance:

• Customization:Provides a free slot for solder-free custom impedance loading, a hallmark of Lehmannaudio phono stages, to precisely match any MC cartridge.
• Vibration Control:Incorporates specialized feet designed to dissipate vibrational energy, improving dynamics and clarity.
• Noise Suppression:The power supply features an LCL Pi-filter and chokes, while the audio board utilizes double-sided construction with additional ground planes for interference suppression.