The K442V is the same as the K440V however the 10" speaker has a much larger magnet & voice coil , for a much higher DB output. It features a 10 inch Speaker and tweeter with crossover. The Bass reflex port allows for the maximum Bass response possible for the cabinet size & volume. The 3 channel Pre-Amp includes the following features. Channel 1 includes 1 XLR microphone input & 1 1/4" input for instruments or HI Z mics, also Volume Bass Treble & Reverb controls. Note: Both inputs may be used at the same time. Channel 2 Has a combo jack 1/4" or XLR with a Hi/Lo Gain switch , lo cut filter switch and Volume Bass Mid Treble and reverb Controls. Channel 3 includes 1 1/4" Instr. level For HiZ Mics, Keyboards. Also included 2 RCA jacks Line Level for any device with line such as, MP3 Players - -CD Players - TapeDecks - Submixers. Ch3 Has Volume Bass Treble & reverb controls. There is an Insert jack to accomidate Effects procesors (Insert is between the pre-amp and the power amp) . The pre-amp also has a Master Volume control. The Power section provides 60 Watts RMS to the internal speakers. Other Features: An 8 ft. power cord with cord wrap brackets, external fuse holder , Speaker ON/OFF Switch ,stereo headphone jack (mono signal) ,1/4" line out jack and a reverb ft. switch jack. The cabinet is covered in a Heavy-Duty Vinyl with Metal corners, a reinforced strap handle and black nylon grille cloth. Size 17.5x15.5x9.75 Inches. Weight 33 Lbs.