Its loud. And has a pentoid to swicth the wattage to 7.5.
I have one and IMO it sounds great'even at low levels.
Tube amps are fck in loud bro. Another good amp to look at are the Blackstar amps.
I have the HT5 Blackstar and love it. You get allot of tones with it.
Unfortunately i dont use them. Because i have a 19 month old daughter. Well the Blackstar has emulated headphone jack' which you don't see on tube amps.
So im more then happy with my boss js10. Plug and play..
Happy hunting.