BGW is a division of Amplifier Technologies, Inc., Montebello, CA. which ATI acquired in 2003. Back in 1974, BGW was chosen by Universal Studios to supply power amplifiers for use in movie theaters worldwide. These amplifiers were an integral part of Universal's Sensurround® sound system featured in EARTHQUAKE, MIDWAY and ROLLERCOASTER. During that period, thousands of BGW amplifiers were purchased by Universal. Many are still in use today in Universal Studios’ theme parks.  In its 40+ years, Amplifier Technologies has become one of the leading OEM suppliers of high end consumer and professional amplifiers for several of the audio industry’s largest manufacturers. ATI specializes in the design and manufacture of balanced-differential amplifiers. This special class of amplifier is known for exceptionally low distortion and speed, resulting in a sound clarity that cannot be achieved with standard unbalanced amplifiers.