[. . . ] The PA series of compact commercial rack mount power amplifiers are designed for demanding sound reinforcement, background music/paging and public address system installations where long term reliability and flexibility is the ticket. [. . . ] The physical chassis of the PA series is also designed for reliability. The PA series runs cool and stable with the direct flow thru chassis layout. The multistage cooling fan runs exceptionally quiet in all modes. PA4150 Rear Panel Shown PA2450L PA4150L PA2400T PA2250T PA1250T All PA models feature: · Balanced phoenix style input connectors ­ makes installation easy. Models available from 160 to 450 watts per channel into 4 ohms or 70/100V. Bridge mode operation on all multi channel models provide power flexibility. Switch selectable hi-pass filter at either 50Hz or 300Hz meets any installation requirement. Independent rear panel level controls provided for each channel All models provide multi-voltage operation from 110-240vac. Integrated "rack ears" allow for rack mounting without additional accessories. Asia & Pacific Rim Japan: EVI Audio Japan Ltd. [. . . ] (mm) Weight 36. 34lbs (16. 5kg) 39. 65lbs (18kg) Front-to-rear 19. 0 (483) x 3. 5 (88) x 16. 0 (406) 36. 34lbs (16. 5kg) 57. 27lbs (26kg) 51. 76lbs (23. 5kg) [. . . ]