1. The on-board filament voltage switch can support 6.3V and 5V rectifier tubes, 6.3V and 12.6V signal tubes. 2. Onboard DIP output gain adjustment switch, the user can select 4 different levels of output gain to support the subsequent equipment with different input sensitivity. 3. Zero negative feedback circuit provides the most natural sound. 4. The large 150W toroidal transformer can provide sufficient redundant current. It is placed in the electromagnetic shielding compartment under the main board. 5. Fast installation capacitor design, the user can freely replace the output coupling capacitor and the power filter bypass capacitor to further improve or customize the tone of different characteristics, without the need for welding to easily replace. 6. The whole machine adopts original genuine HiFi-grade components, such as Vishay military-grade resistors, Rybycon and Nichicon low ESR power filter capacitors, Obbligato Gold coupling capacitors, Bennic XPP power bypass capacitors, ALPS volume control and power switches, and genuine gold-plated terminals. 7. All aluminum alloy chassis, solid aluminum alloy shock-absorbing cone feet and button knobs. 8. With remote volume control function.
1. Output voltage: 20V (maximum), depending on the DIP gain switch setting and the type of signal tube used. 2. Output impedance: >= 10Kohm. 3. Frequency response: DC to 50khz. 4. Input: RCA x 3, XLR x 1 5. Output: RCA x 2, XLR x 1 6. Active subwoofer support: Yes 7. Dimensions: 31x39x14.5cm（W*D*H） 8. Gross weight: 12 kg 9. Input voltage: 110-120V / 220-240V can be selected
1. 6.3V filament rectifier tube: 6Z5P, 6X5. 2. 5V filament rectifier tube: 5R4, 5U4G, 5AR4, GZ33, GZ34, 274B, 5Y3, 5Z3P. 3. 6.3V signal tube: 6N11, 6N1P, E88CC, E188CC, CCA, 6922, 6H23, 6H6, 6H30, (6SN7 needs to use 6SN7 to 6922 conversion seat). 4. 12.6V signal tube: 12AU7, 12BH7, E80CC, (12SN7 needs to use 6SN7 to 6922 converter).
When using the 6.3V filament rectifier tube, the onboard S2 switch must be set to the 6X5 position. When using a 5V filament rectifier tube, the onboard S2 switch must be set to the 5AR4 position. When using 6.3V filament signal tube, the onboard S1 switch must be set to 6.3V. When using 12.6V filament signal tube, the onboard S1 switch must be set to 12.6V position.
1. The standard Obbligato Gold coupling capacitor is 630V 2.2UF. The capacity can be 1.5UF-4.7UF. The voltage must be >= 350V, infinite. 2. The standard Bennic power filter bypass capacitor is 350V 6.8UF. The capacitance can be 0.1UF-10UF. The voltage must be >= 350V, infinite.