My amp is only 220v and my speakers are 6000and800watt

[junejieboycobero]

How to get boost my 220v amp to get the loudest of my speaker 6000watt and 800watt

 

[kanewolf]

The input mains voltage that an amp has is unrelated to the audio output power.

 

[sam99dave]

It would be great if you give the details of your headphone. Preferably, impedance, then it is easy to answer.

 

[americanaudiophile]

You can't "boost" the amp you have to replace it.
If your amp is 220 WATTS (not volts) and your speakers can handle 6000 and 8000 watts you would need a much more powerful amp to max out the volume of the speakers.