Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Audio and Video Talk
General Discussion
What power amplifer?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Hennie" data-source="post: 33270" data-attributes="member: 20"><p>Another advantage of Class A is that the power draw is not only constant but remains sinusoidal. With Class B or AB amplifiers the current supply waveform is a rectified sinus waveform with nasty HF harmonics. This can couple into sensitive parts of the circuit, therefore Class AB / B amplifiers can be self contaminating if not well designed and well laid out i.t.o. earthing and PSU rails.</p><p></p><p>In the end if there's a problem it would show up in distortion tests, and it is entirely possible to reduce these effects to very low levels without resorting to Class A. It takes a bit more work and measurement though.</p><p></p><p>Class A is just easier in this respect, and would ultimately in practice be somewhat cleaner. Whether it is necessary to resort to Class A to reduce power supply effects is open to question.</p></blockquote><p></p>
[QUOTE="Hennie, post: 33270, member: 20"] Another advantage of Class A is that the power draw is not only constant but remains sinusoidal. With Class B or AB amplifiers the current supply waveform is a rectified sinus waveform with nasty HF harmonics. This can couple into sensitive parts of the circuit, therefore Class AB / B amplifiers can be self contaminating if not well designed and well laid out i.t.o. earthing and PSU rails. In the end if there's a problem it would show up in distortion tests, and it is entirely possible to reduce these effects to very low levels without resorting to Class A. It takes a bit more work and measurement though. Class A is just easier in this respect, and would ultimately in practice be somewhat cleaner. Whether it is necessary to resort to Class A to reduce power supply effects is open to question. [/QUOTE]
Insert quotes…
Verification
Post reply
Audio and Video Talk
General Discussion
What power amplifer?
Top