Matisse 5670 Tube-preamp design Upgrade Audio Vacuum Tube Pre-Amplifier valve
MASTISSE DESIGN TUBE PRE-AMP UPGRADE WITH JAN.5670 tubes
Quantity: 1PC whole assembled tube Pre amplifier
Silver and Black Front Plate are available
Tubes: 2pcs Jan.5670
Input sensitivity: 150mv
Voltage output: 1.8V (RMS THD <0.03%)
S/N Ratio: 94DB
Frequency Response: 10Hz-50KHz (-0.5DB)
Input Impedance: 250Kohm
Output Impedance: 600ohm
AC Input: 110V/220V (switchable)
Power Consumption: 15W
Dimension: 260 * 130 * 110 (mm) (WDH)
*We take famous Matisse Fantasy Line Stage circuit as reference to design this Tube Pre-amp, and modify much ourselves:
1. Re-design PCB circuit,try best to shorten lenght of signal wire, strictly use single point ground connection to get left and right channels more symmetrically, and higher S/N ratio (94dB)
2. Adopt DALE reistors and 4pcs ERSE audio grade capacitors(99.99% high purity OFC lead) for signal part;
*use Germany WIMA capacitors as Decoupling capacitor
*use 2pcs NIPPON CHMI-CON 450V, 220uf electrolytic capacitors in power filtering circuit
*use TOCOS 100K step potentionmeter
*use high quality golden plated 9pin ceramic tube socket
*use 2pcs Jan. 5670 tubes inside the chassis
3. Adopt customerized pure copper wire EI power transformer, high power rate, low temeperature
4. Adopt Aluminum chassis with Drawing oxidation surface treatment. 6mm thickness front gear plate,
5. switchable power switch for selecting 110V/220V
The main upgrade point of the new upgraded version of Horseshoes 6:
1. The tube uses the Soviet poisonous sound tube 6H3; the tone is soft and mellow
1. the PCB is changed to the blue military board, the work performance is more stable, the re-single point grounding wiring is more reasonable, and the background is quieter.
2. all capacitors use the gold word ERSE US imported audio dedicated coupling and capacitor, decoupling with the fever Germany WIMA. All resistors use 1/2W US military DALE resistors, and the power supply uses 3W US military DALE. The whole machine is almost all imported fever parts.
3. the potentiometer is upgraded to the Japanese original type 16 ALPS potentiometer, the balance is better, the volume adjustment is more balanced and durable.
4. the electronic voltage regulator filter circuit has been added, the power supply continuous current operation is more stable, the anti-interference is stronger, and it is fully qualified for the working state of large dynamics, and is not soft.
5. the tube seat is gold-plated, the tube is upgraded to the former Soviet Union poisonous new boxed antique old tube, the tone is sweeter and more mellow
6. the signal input is increased to two inputs, with a stable switch to facilitate a variety of signal inputs