L-Acoustics LA48a Professional Power Amplifier. I have quite a few of these and the amps will vary a bit cosmetically. These are Lab Gruppen FP6400 amps that L-Acoustics has rebranded. The only difference between these and the Lan Gruppen 6400 is the labelling.
These are quality amps manufactured pre-Beringer. The item "L-Acoustics LA48a Pro Power Amp 4600 Watt 2 ch w Warranty Lab Gruppen FP6400" is in sale since Tuesday, July 2, 2019. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Amplifiers". The seller is "www73171" and is located in Camarillo, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guadeloupe, Iceland, Jordan, Cambodia, Cayman islands, Liechtenstein, Luxembourg, Martinique, Maldives, Nicaragua, Pakistan, Paraguay, Reunion, Uruguay.