Marshall PB-100 Powerbrake (inductive speaker attenuator) You want great, overdriven tone. Your valve amp sounds its best CRANKED. But you're tired of your dental fillings shaking loose. Or maybe you're in the studio and you don't want your amp bleeding into everyone else's mics. Or maybe you're one guitar practice away from getting evicted! How can you get monster sound at quieter volume levels? Simple: Put a brake on it. The Marshall Power Brake is the power attenuator that delivers great sound at low volume levels. There are other attenuators or load boxes available, but they don't provide the right type of inductive load. Your amp needs to think it's connected to a speaker. That's what the Power Brake does. The other guys? At best, they cause your amp to sound thin and feeble. At worst, they can blow your valve's output transformer -- Ouch! Get the Marshall Power Brake. It's safer for your amp and safer for your ears, and you only get one pair of those per lifetime.