Latest Events
Contact Us
Shenzhen Yasi Technology Co., Ltd. is a modern enterprise management enterprise integrating development, production and sales. Our products have...
Contact Now
Latest News

How to choose a good quality bluetooth speaker

TheBluetooth speaker has swept the entire audio market with its lightning speed.With the fierce competition in the Bluetooth speaker market, variousdi...

HKTDC Gifts & Premium Fair 2019

1.HKTDC Gifts & Premium Fair 2019 Booth No. :3G-B07 Time: 27th Arpil- 30th/April, 2019 Address: Hongkong COnvention Exhibition Centre, 1 Expo Drive, ...

HKTDC HK Electronics 2019 (Spring Edition)

HKTDC HK Electronics 2019 (Spring Edition) Booth No. 3E-C28 Time: 13th April-16th April, 2019 Address: Hongkong Cnvention Exhibition Centre, 1 Expo ...

The Unbearable noise

Have you ever encountered such a situation,whether you listen to music or watch a movie, the speaker will make some noise,and even do nothing, as long...

2018 Antumn Electronics Edition in Wanchai, Hong Kong

As we all know, Autumn Electronic Products Fair and International Electronic Components Fair in Wanchai, Hong Kong Trade and Development Council, 2018...

How to choose noise reduction headphones/ Earphones

Noise pollution has become more and more important. Business trips, daily trips, or work environments seem to make noise aside when we fall asleep. Si...

How to choose your own mini speaker

There are many people who originally bought the sound of blindly catching the tide and quickly found outdated and awkward to use, but because they did...

Material that affects the speaker quality

The mainparts of the speakers are the speakers, so what are the materials that affectthe sound quality of the speakers?There are several points to be ...
Bluetooth headset
Your position:  Home > News > newclass > Class a amplifiers sound quali.....


Class a amplifiers sound quality analysis

  • Author:James
  • Source:
  • Release Date:2016-08-03

In static, a power amplifier and b power amplifier connected to pure resistive load, the test will be about the indicators, and even class a larger thermal noise.But the actual application, it is the true load (dynamic load), speakers, and the impedance of the different frequency when the speaker is different also, at this time of electroacoustic index will be inferior to pure resistive load indicators, transient distortion is produced.Due to the existence of the negative feedback and will feedback to the former level, this kind of distortion is key to the speaker system transient quality type design, uninterrupted by effective damping (control), and the higher the voltage build-up rate of the signal, the distortion more serious.For hifi speakers (Such as:NSP-0001), it is important to the quality of the speaker system inertia can by amplifier is effective damping (control). 

bluetooth pen drive speaker_01
B damping of the power amplifier can not effectively control the speaker, for any output only one arm and a half weeks at work, or pushing or holding, but it can't work at the same time, so it's a single direction of damping, namely whether the positive half cycle or negative half cycle, he only propelled the speaker work motivation, and does not produce control a pull back, to comprehensive damping, drive current must promptly reversing, here's the problem.
Input square wave, for example, may work when input signal wave are more complicated, for instance, when the signal goes up, the speaker can go to work according to the signal waveform, but when the signal suddenly stops, the speaker is due to the effect of inertia of the quality, does not stop, this time the voice coil is conducting A counter electromotive force generated arm and as output tube, and in the original globe B arm is conduction, and the counter electromotive force and inspired by negative feedback back to the top level has been enlarged to B arm output tube conduction, complete B power amplifier this special damping, because the process to zero, A moment lost free oscillation damping.Conduction change as the process finished, B arm, originally A arm of the conduction is the partial delivery pipe resumed conduction, and experience A zero damping moment to regain lost damping.So b damping of the power amplifier at any moment is of single direction, the speakers of damping is accomplished by running a zero phase, having a distortion in almost all the time. 

crystal bluetooth speakers_01
Class a amplifiers plus or minus two arms are conducting, to the damping coefficient of both sides, in the sudden high voltage rises, voice coil according to the waveform to action, the signal stops, the electric potential by the conduction of the complete pathway B arm, inertia is damping, cannot produce free oscillation, the potential can establish, class a amplifier the omnidirectional damping, forcing the vibration of the speaker always based on waveform to vibration signal.Class a amplifier speakers whether under the condition of different signal voltage will not make a transient distortion, can control the omni-directional damping, drive current commutation in time, so as to achieve the perfect sound quality.NSP-0004 a crystal speaker is a good example of this amp sound quality pure, high don't distortion bass heavy powerful mix, can put the perfect sound performance paragraphs audio freely.