Have you ever said, "My guitar amp sounds different today!" You're not going crazy, the voltage from your wall is changing! Protect and hear your guitar amp the way it's supposed to be heard. The AmpRX Brown Box is a must have tool for guitar players who play through tube amplifiers. The Brown Box is a voltage attenuation device, it takes the voltage coming out of your wall and lets you see exactly what it is and allows you to adjust the voltage down to a proper voltage. Many outlets in the USA put out more than 120 volts which can damage, or change the sound/feel of your amp. Further more vintage guitar amps were really designed to run at 110 volts, the Brown Box let's you operate these safely.

Dropping the voltage for modern guitar amps change the feel and sound in subtle ways that let you make sure your amp is feeling and sounding right. Use it at home, take it to gigs, once you get used to having a Brown Box you won't want to play without it.

Details from AmpRX

• 120 Volt AC, 50/60 Hz, 5 Amp Voltage Attenuator supplies up to 540 Watts, designed for small or mid to larger sized amplifiers (i.e. Fender Deluxe/Bassman/Twin, Marshall 50w/100w, Vox AC30). Can also be used for parallel or dual amp rigs.
• Easy to read back-lit L.C.D. display enables real-time voltage and amperage monitoring - also useful for diagnostics
• Two adjustment modes to help to fine-tune your voltage
• Proprietary transformer design wound exclusively for use with tube amplifiers, an industry first
• Equal or attenuated voltage output and a 5 amp fuse with in-rush current protection ensures that you will never accidentally overload your amplifier
• Powder coated EMF neutral housing and tough road rugged construction
• Silent, cool operation