Behringer 1C Black Monitor Speakers Power Accessories and this particular one is

and this particular one is a bolt on design from before 1975 (that's when they started using serial numbers)

(1) Switchcraft 1/4" Mono Input Jack

Plug into the DI100’s balanced ¼ " TRS or XLR Input

the B2030A provides ruler-fl at frequency response from 50 Hz - 21 kHz

made by skilled artisans

Behringer 1C Black Monitor Speakers Power Accessories and this particular one is1C BK Our 1C BK 2 way monitor speaker merges stunningly accurate sound reproduction with neo classic design, making it perfect for even the most sophisticated environment. Sold in pairs, the 1C BK is an exceptional choice for a wide range of fixed installations, such as stereo and surround applications, home recording studios, restaurants as well as audio and video production suites.