L1969 Sapphire Case · Yuanxi 18W Pure Class A Power Amplifier Headphone Amplifier
Only with this design, pay tribute to a circuit that has been popular for more than half a century, and hope she will bring you the most beautiful music!
I named this machine after the old Mr. Xin Qiji’s Qingyu case · Yuanxi. It should be described with the last sentence of this epic poem to describe this power amplifier. As the so-called people are looking for him thousands of times, suddenly looking back, the person is in the lights. Recession!
Basic parameters:
- Maximum undistorted output power: 18W*2
- Headphone output power:350mW/600 ohms, 1300mW/32 ohms.
- Distortion: 1KHz sine wave 20W output <0.01%;
- Input sensitivity: < 0.4Vrms.
- Power amplifier voltage gain: about 14 times.
- Supply voltage and maximum power consumption: AC220V , <150W
- Volume and weight:280*212*90mm, about 7Kg (including packaging accessories, etc.)
Panel function description:
- Three button switch functions on the front panel:
- Output Sel switch: used to select the headphone output or the rear speaker output.
- impedance Sel switch: This is a very uniquely designed headphone port output impedance selection switch, which can be used to adapt to a variety of different characteristics of headphones. When used for high impedance output, the switch is in the down state, which is adapted to T1 When waiting for 600 ohm high-impedance headphones, the control power and damping can be greatly improved, and the sound will be more calm; when pushing low-impedance headphones such as K701 that require high current, you can put the switch in the up position, which can be large at this time. The amplitude improves the dynamics and low frequency dynamics of the headphones. It should be noted that if you are some small earphones or even earplugs designed for direct push, it is recommended to amplify the high-impedance output state below the switch, so that the output power on the low-impedance earphones will be reduced accordingly to avoid pushing or even damaging the earphones .
- Iuput Sel switch: There are two sets of lotus inputs on the back of the machine, and one of them can be selected through this switch.
Her difference:
- Using 200W high power ring cow.
- Four large pond capacitors, a total of 60000uf filtering.
- Nearly 38V power supply greatly increases the output power.
- The current is increased to more than 1.5A to ensure that the sound is warm and durable.
- She is more feverish, feverish, feverish, very hot, please accept her shortcomings.
After-sales service:
- This machine can be auditioned and returned within a week, and the buyer is responsible for the return freight. The weight of this machine is amazing. By default, it will be sent to Debon Express and delivered to the door. If Debon can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t reach the place, please contact me to discuss the delivery method, otherwise, the seller has the right to decide not to ship.
- The default express delivery does not include Tibet, Xinjiang, Yunnan-Guizhou, Hong Kong, Macao, Taiwan and areas outside of China far away from Tianjin. For these users, please contact me to discuss logistics and shipping information, otherwise the seller has the right to decide not to ship.
- This machine is guaranteed for one year. Repairs outside the warranty period only charge component costs.
- Please understand that you will lose the warranty service if you buy a finished machine, polish or modify the circuit by yourself.
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