Acoustic seals on the door can make a big difference too, there's some simple white ones available that stick onto the frame. Depending on the power of the guitar amp though you'll still have to impose an upper limit as even small amps can create enough noise to defeat your soundproofing efforts.
Acoustic seals on the door can make a big difference too, there's some simple white ones available that stick onto the frame. Depending on the power of the guitar amp though you'll still have to impose an upper limit as even small amps can create enough noise to defeat your soundproofing efforts.