Description

New 2021/July

The sound characteristics of this machine: outstanding vocals, sweet and transparent intermediate frequency, good magnetism, strong guts, improved low frequency is also good, strong load capacity, suitable for listening to vocals and strings.

This machine has been sold to gold in 2017 for 4 years. After continuous improvement and optimization, a new small case was launched in July 2021. Because of its good sound, the high-voltage voltage stabilizer follows the original Japanese Kubota-style circuit design and has an internal output. Low resistance, high-voltage power supply delay, stable voltage, comprehensive three-frequency performance, sweet, bright and bright sound. LT1085 filament delay power supply, the classic amplifier circuit is well known.

Tips for use: When enthusiasts use the back stage of the stone machine, because the tube lamp filament of the front stage needs to be preheated, first turn on the front stage for 50 seconds, then turn on the back stage; turn off the back stage first, then turn off the front stage, so that it will not There will be an impact.

The difference between this machine is: (this is also a highlight of this machine)

1. The high voltage circuit adopts Japanese Watian type voltage stabilized circuit 2SK1170 field effect tube for voltage stabilization, which has very stable voltage, small ripple coefficient, low output internal resistance, and high voltage power supply delay (protection of tube life, anti-switching machine impact, etc.) , The power source is the heart of the pre-dan, the key to making a good voice!

2. Filament power supply: using the very familiar Linear Technology LT1085CP high-current stabilized power supply, large current and stable voltage, etc. advantages!

3. Luxurious all-aluminum case, the input and output are Taiwan-made RCA all-copper sockets, authentic Japanese ALPS27 volume potentiometer, double-sided 1.6MM thick military-grade lead-free spray tin PCB design, and the internal signal line is made in Japan. Naimei oxygen-free copper signal lines transmit signals very well.

4. The power supply cow uses high-end audio fever R cow transformers. R cows are generally difficult to see. They are generally used for high-end audio or medical equipment. They have the advantages of low magnetic leakage, high efficiency, fast speed, and sweet sound. The power supply cow is The heart of the machine, so this machine chooses R cow!

5. All capacitors and resistors are imported from Japan, including Japan Chemical, Philips BC, Lifa RIFA, Vishay VISHAY, Germany ERO, etc.; resistors are imported from Japan KOA and Panasonic.

6. The tube is the new Noble Voice ECC83*3, and the rectifier tube is Suguang 6Z4 or American 6X4 (according to the selected package)

7. Very high signal-to-noise ratio, which is rare for the bile preamplifier. No noise can be heard within 0.3 meters, because the bile preamplifier will have a little hot bottom noise. At present, no seller can achieve no noise at all, unlike the stone The machine can be as quiet as the deep ocean, and you can’t hear it if you put your ears on the speakers. I think this machine is very noisy. If you can’t even accept this noise, then you don’t have to play with tube amplifiers!

8. Chassis size: 240*320*90mm, the net weight of the whole machine is about 3.6kg, and the gross weight is 4.6KG.

9. Technical parameters:

(1) Frequency response: 5Hz-30KHz (-1dBu, both no-load and 510 ohm load are the same). It can be seen from the test frequency and distortion that this circuit has a strong load capacity. Note: American ATS-2 AP test The instrument can only measure 30KHZ, the actual machine should exceed 50KHZ.

(2) Distortion: 0.009% (with 510 ohm load, 1KHZ, output 1V)

(3) Magnification: 11.5 times (with 510 ohm load test)

(4) Maximum output 20V ((with 510 ohm load test)

(5) Signal-to-noise ratio: 91dBu

(6) Sensitivity: -65dBu

(7) Input impedance 100K

10. The piping of this machine: Sugon 6Z4*1 or American 6X4*1 (according to the choice of package), the voice of the nobleman ECC83*3.