Why does the sound change with the power supply?Problems with amplifiers and DACs spoken by Xi Audio founder
Michael Shaoso has launched a manufacturer to create consumer equipment to play a professional audio world and regenerate the "true sound" incorporating the essence.That is the Xi Audio established in 2017.
He spoke at the Top Wing's new product launch held on April 27 at the Headphone Festival.He explained the concept of the new product DC -driven headphone amplifier "BROADWAY" and the new features of "Sagradac".
Work on the fundamental issues of power supply
Michael Shao "This time," Broadway "(full balance) and" Broadway S "(single end) you see. The biggest feature is the battery driving with built -in rechargeable batteries. Why am I battery?I will explain if I was particular about it. As you all know, replace the power cable of the audio device or replace the table tap, which changes the sound quality, this is the pleasure of audio and pain. I am also painful.The part that affects the sound quality in relation to the power supply that is considered is the power supply circuit in the component. "
Michael Shao is on the left
Shao projected the two -wave rectifier circuit on the screen.The left end is an exchange power supply containing a transformer, a bridge diode next to it, and the load connected to the electrolytic capacitor and the DC is shown on the right.
Shao "This is a typical rectifier circuit. The waveform that has become a pulse by a diode is rectified by a smooth condenser to create a DC. You can see, but there are many difficult problems. Originally, the waveforms of the exchange are divided into up and down, but the bridge diode makes the upper mountain tough. If you pass through the condenser, the waveform is almost flat. Become"
"The biggest problem is here," said Xiao, a linear part of the green map that was smoothed by the condenser, containing a ripple current.
Mr. Xiao "When viewed in the time axis, the charge and storage of the condenser, especially the discharge (time lag), are a problem. Each manufacturer adopts large capacity condensers and focuses on the quality of the condenser.Because it has a long time and affects the sound quality. I think it would be better to use a high -performance condenser, right? (But that's not the only problem).
The capacitor repeats power and discharge in a short time of 1/100 seconds.You may think that the noise from the transistor will get on the circuit, but the more problematic is the noise generated by the condenser.
This is one of the reasons why the sound quality changes when the power supply circuit or power cable is replaced.It has been more than 100 years since the rectification circuit has been created, but the fundamental method to solve this has not yet been found.Every manufacturer pursues high sound quality by devising the circuit after the power supply.
In other words, I am always struggling with a power supply circuit that deals with exchanges.I made a Broadway to avoid that difficulty.If you use a battery drive, you will not have to struggle with the power supply circuit.Now I don't have to worry about the condenser.
The difference between Broadway and other products is that this unit always moves in battery driving.Battery -driving is not a new method, but the battery circuit used in digital audio players so far has been raised to increase the voltage using the pressurized circuit without using the rechargeable battery power.Pressure circuits can cause pure DC.Broadway connects four batteries in series and uses it as it is.
However, battery driving is ideal, but the power that can be supplied is limited.I adopted it because I thought it was the best headphone amplifier.The size is also smaller to the last minute.
In front of the battery, charging, protection and management circuits are included.This circuit will properly charge the battery connected to the AC adapter.The problem when the battery is connected in series is that if the capacity is varied between the battery, the battery with a small capacity will be fully charged first.Charging is quick, but the discharge is fast, so only the fixed battery is always loaded and it tends to deteriorate.Broadway has a management circuit that manages the battery, so users can use their products for a long time with confidence.
Finally, the sound of Broadway also changes depending on the type of battery.The standard is made of Panasonic, which also uses Tesla Motors, and is equipped with a 18650 size battery.Please replace the battery and enjoy the difference in tone.This unit has a good S/N feeling, so it is ideal for high sensitivity custom earmoni. "