Why the sound is diferent?

[tadiam1]

I build an amplifier Symmetric....(8 transistors)

why when exchange the type size of my protoboard amp the hi frecuency sound more clear?

Exchange the value resistors in the base of output transistors the sound change too ???why

[mos57]

Originally Posted by tadiam1

why when exchange the type size of my protoboard amp the hi frecuency sound more clear?

Can you explain better this argument or post photos?

When you put a resistor in series with the base, then it together the input cap of transistor form a pass-bass filter, so the bandwith is reduced (more high value resistor, more reduced bdw).

Francesco.

[tadiam1]

No have input capacitor ..the amp is all dc coupled....the base resistors are 47r..put 4,7r and sound more clear.

Input 2sc1815 (2) 2sa1015(2)
Drivers 2sd600-2sb631
output 2sc3856-2sa1492

[mos57]

As i explain above when you put an higher resistor then the band is reduced (read lower high frequency).

Francesco

[mos57]

Originally Posted by tadiam1

I build an amplifier Symmetric....(8 transistors)

why when exchange the type size of my protoboard amp the hi frecuency sound more clear?

Meanwhile you not well argument this question, yet.

Francesco

[tadiam1]

no have comment about this?
But tre diferent sound is present......Ok

[richie00boy]

You have been answered at least twice

[ontoaba]

More clear may just noise is reduced. Better board means lower bad interference. Lower Rb gives smaller compensated voltages.