How loud can a 3w speaker get?
Rule of thumb double your power you get 3 db louder so 2 w would be 91db so 3 w would be ~ 92 db.
How loud is a 2 watt speaker?
If that speaker is powered with 1W of power, it will generate 90dB when measured at a distance of 1 meter. If we double that power to 2W, the SPL measurement will increase to 93dB.
Is A 5 watt speaker Loud?
No, if you consider that a band like Pink Floyd easily used 50,000 Watts on stage then 5 Watts is not very loud. But if you force 5 Watts into your headphone it will probably be very loud.