|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Class A SS or chip amp tda2040 posted by rcollege on October 22, 2010 at 01:02:17:
"Class A" means the output device never shuts off. There is substantial DC current flowing through the output device all the time. In a single-ended amp, there is no way to balance the bias current, and the speaker cannot tolerate this. Single-ended amps made of tubes require specialized output transformers that can tolerate the DC, and these are wound to match the high tube plate impedance to the low speaker impedance.
I don't know if anyone makes a specialized output transformer that matches low transistor impedance to the speaker, while tolerating the bias current.
An alternative would be to couple the speaker with a huge capacitor, but this would thoroughly degrade the sound.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Class A single-ended requires a transformer or coupling capacitor. - Al Sekela 15:15:28 10/22/10 (2)
- Really? - Ric Schultz 16:35:07 10/22/10 (1)
- Thanks. I did not know this had been done. - Al Sekela 15:04:55 10/23/10 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
