The New Musical Paradise MP-701 MK4 Tube Preamp Pre Amplifier
MP-701 MK4 Version Upgrade Changelogs (2026-06-29）
1. Equipped with a 2-inch IPS LCD screen to intuitively display real-time volume levels and input status for convenient operation.
2. Adopts high-end 100-step shunt-type reed relays, paired with high-precision Vishay and KOA resistors to build a professional-level volume control system. This upgrade significantly optimizes channel balance and overall sound performance, delivering purer and more accurate audio output.
3. Supports remote control for input switching, volume adjustment and mute functions, bringing effortless operation experience.
4. Upgrades the power transformer to a musical-tuned Z11 EI core unit, laying a solid foundation for warmer, more textured and immersive sound performance.
5. Optimizes the power filtering and output coupling capacitors, effectively improving signal purity and sound performance.
6. Refines the rectification circuit design to effectively reduce tube aging and greatly extend the service life of rectifier tubes.
7. Features a reinforced aluminum alloy chassis, ensuring excellent vibration resistance, heat dissipation and structural stability.
The MP-701 MK4 tube preamplifier comprehensively elevates your HiFi audio system to a brand-new level. Far beyond a simple volume controller, it excels at restoring delicate sonic details, enhancing dynamic contrast, boosting tight and powerful bass, and creating a wider, deeper and more three-dimensional soundstage, bringing an immersive auditory feast for audiophiles.
Core Technical Highlights
1. Built-in filament voltage selector switches support dual specifications of rectifier tubes (6.3V / 5V) and signal tubes (6.3V / 12.6V), compatible with a wide range of tube models for flexible sound tuning.
2. Onboard DIP switches offer 4 adjustable output gain levels, perfectly matching the input sensitivity of different power amplifiers to achieve optimal system matching.
3. Adopts a zero-negative-feedback circuit design, retaining the most natural, original and transparent HiFi sound signature.
4. Equipped with a high-power Z11 EI core transformer, providing abundant power redundancy to ensure stable and sustained audio output even under high-load conditions.
5. User-replaceable output coupling capacitors and power filtering bypass capacitors allow audiophiles to freely customize and optimize sound characteristics according to personal preferences, with no soldering required for replacement.
6. Assembled with full genuine HiFi-grade premium components, including Vishay military-grade resistors, genuine Rubycon, Panasonic and Vishay BC low-ESR power filtering capacitors, RIFA PHE450 MKP coupling capacitors, ICEL MKP bypass capacitors, professional shunt volume control modules and gold-plated signal terminals, ensuring ultra-low signal loss and durable performance.
7. Premium solid aluminum alloy chassis and control knobs deliver superior texture, vibration suppression and long-term durability.
8. Comes with practical remote control functions for volume adjustment and input switching, realizing convenient one-key operation.
Full Specifications
1. Max Output Voltage: 20V (variable based on DIP gain settings and installed signal tube models)
2. Output Impedance: 2KΩ (Recommended power amplifier input impedance: ≥7KΩ)
3. Input Impedance: 30KΩ
4. Frequency Response: DC – 50kHz
5. Input Interfaces: 3 × RCA, 1 × XLR
6. Output Interfaces: 2 × RCA, 1 × XLR
7. Subwoofer Output Support: Yes
8. Product Dimensions: 41cm (W) × 31cm (D) × 10cm (H)
9. Gross Weight: 10kg
10. Input Voltage: 110-120V / 220-240V (switchable)
Compatible Tube Models
1. 6.3V Filament Rectifier Tubes: 6Z5P, 6X5
2. 5V Filament Rectifier Tubes: 5R4, 5U4G, 5AR4, GZ33, GZ34, 274B, 5Y3, 5Z3P
3. 6.3V Signal Tubes: 6H1n, 6N11, 6N1P, E88CC, E188CC, CCA, 6922, 6H23, 6H6n, 6H30, 6CG7, 6SN7 (with 6SN7 to 6922 adapter)
4. 12.6V Signal Tubes: 12AU7, 12BH7, E80CC, 12SN7 (with 6SN7 to 6922 adapter)
Tube Voltage Switch Instructions
Set the onboard S2 switch to the 6X5 position when using 6.3V filament rectifier tubes; set it to the 5AR4 position for 5V filament rectifier tubes.
Set the onboard S1 switch to the 6.3V position for 6.3V filament signal tubes; set it to the 12.6V position for 12.6V filament signal tubes.
Capacitor Replacement Parameters
1. Stock RIFA PHE450 Coupling Capacitor: 1000V 2.2μF
Replacement Range: 1μF – 4.7μF, voltage ≥350V, non-polar capacitor
2. Stock ICEL Power Filtering Bypass Capacitor: 400V 2.2μF
Replacement Range: 0.1μF – 10μF, voltage ≥350V, non-polar capacitor
Warranty Policy
1-year official warranty for the main unit; 1-month warranty for vacuum tubes (consumable parts).
Notes
1. The MP-701 MK4 adopts a single-ended circuit design. The XLR interface is converted from RCA for user convenience, compatible with standard XLR audio cables.
2. Partial product specifications and components are subject to upgrade and change without prior notice.
User Manual
