Bridge instead A+

[alex0]

Amplifier with schematic well-know as A+ schema 1
What do your think about this? schema 2
I think, that property of “filtration” distortions keep safe in schema 2.
Main preference is common ground in power supply if this solution used in multi-channel units.

 

[tschrama]

After a quick scan,

I think that schema 2 is limmited by it's performance of the Class B amplifier. The class A amplifier sences one leg of the output, but the other leg is controlled by the Class B amplifier. Even if the Class A amplifier is perfect, won't the speaker be subjected to the limmitation of the Class B amplifier?

Regards,
Thijs

 

[djk]

Fig. 2 is the Yamaha B2X, 1980~1985.

 

[alex0]

1. Where I can see schematic design of Yamaha B2X ?
2. Why this solution not use ?

 

[Upupa Epops]

Schema 2

is nonsens - earlier start limited amp with rails 5 V and it will be by output power cca 1,5 W / 4 Ohm. Keep schema 1.

 

[djk]

Gee, Yamaha must know something you don't know, their amp puts out about 150W/8R.