Elevate your audio experience to new heights with the Musical Fidelity Nu-Vista PAM Mono Power Amplifier, a brand-new masterpiece now available at Len Wallis Audio. Crafted for audiophiles who demand the very best in hi-fi stereo sound, this monoblock amplifier blends the warmth of Nuvistor valve technology with cutting-edge engineering. Whether you’re upgrading your home theatre or creating a reference-grade home stereo system, the Nu-Vista PAM delivers a sound experience that’s both powerful and emotionally captivating.

Technical Specifications for Musical Fidelity Nu-Vista PAM Mono Power Amplifier

General Specifications

• Type: Fully balanced, discrete mono power amplifier
• Amplifier Class: Class A buffer stage (Nuvistor valves) with Class AB output stage
• Design: Monoblock configuration with separate external power supply (PAM PSU)
• Finish Options: Silver or Black (extruded aluminium front and side panels)

Dimensions and Weight

• Dimensions (PAM): 483 mm (W) x 187.5 mm (H) x 494 mm (D, including connectors)
• Dimensions (PAM PSU): 483 mm (W) x 187.5 mm (H) x 478 mm (D, including connectors)
• Weight (PAM): 27 kg
• Weight (PAM PSU): 40 kg
• Total Weight (PAM + PSU): 67 kg

Power Output

• Power Output (8 ohms): 600W
• Power Output (4 ohms): 1000W
• Power Output (2 ohms, peak): 1500W
• Current Output: > 150 Amps peak-to-peak (for dynamic headroom and speaker control)

Audio Performance

• Total Harmonic Distortion (THD + Noise): < 0.003% typical (20 Hz–20 kHz)
• Signal-to-Noise Ratio (S/N): > 120 dB (A-weighted)
• Frequency Response: 10 Hz–80 kHz (+0, -1 dB)
• Damping Factor: > 200 (for excellent speaker control)
• Channel Separation: > 90 dB (20 Hz–20 kHz)

Inputs

• Unbalanced Input: 2 x RCA (single-ended)
• Balanced Input: 2 x XLR
• Input Sensitivity: 1.5V RMS (for full output)
• Input Impedance (RCA): 100 kΩ
• Input Impedance (XLR): 100 kΩ

Outputs

• Unbalanced Output: 1 x RCA (for daisy-chaining to additional amplifiers)
• Balanced Output: 1 x XLR (for daisy-chaining to additional amplifiers)
• Speaker Outputs: 1 pair of high-quality binding posts (suitable for 4 mm banana plugs, spades, or bare wire)

Valve Configuration

• Nuvistor Valves: 4 x 6S51N Nuvistor valves (used in the discrete Class A buffer stage)
• Valve Role: Provides a warm, smooth sound signature with fast transients

Power Supply

• External Power Supply Unit: PAM PSU (included)
• Transformers: Dual high-capacity toroidal transformers (housed in PAM PSU)
• Capacitance: High-grade capacitors for stable power delivery
• Power Supply Design: Separate power supplies for audio and control circuits to minimise interference
• Mains Voltage: 230V–240V (50/60 Hz)
• Power Consumption: < 0.5W (standby), 1500W (maximum)

Additional Features

• Display: Colour display with VU meter (for real-time power output monitoring)
• Dimmer Function: Adjustable display brightness
• Trigger Inputs/Outputs: 12V trigger in/out for system integration (e.g., remote power on/off)
• Protection Circuits: Overload, over-temperature, and short-circuit protection
• Cooling: Passive cooling with large heatsinks for efficient heat dissipation
• Feet: Anti-resonance feet to reduce vibration and improve stability

Materials and Build

• Chassis: Extruded aluminium front and side panels with a steel chassis
• Shielding: Copper-plated internal shielding to reduce electromagnetic interference
• Connectors: Gold-plated RCA and XLR connectors for optimal signal transfer
• Binding Posts: High-quality, gold-plated speaker terminals

Included Accessories

• Power Supply Unit: PAM PSU (with connecting cables)
• Mains Cable: High-quality IEC power cable
• Manual: User manual with setup and safety instructions
• Warranty: Manufacturer’s warranty