The A1525 is the largest most powerfull Amp it features a 15" speaker with 2 tweeters and crossover. The cabinet is lighter and smaller than most other brands. The 3 channel Pre-Amp includes the following features. Channel 1 includes 1 XLR microphone input & 1 1/4" input for instruments or microphones, 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 passive/active switch , lo cut filter switch and Volume Bass Mid Treble and reverb Controls. Channel 3 includes 1 1/4" Instr. level For HiZ Mics, Magnetic pickups, Pizeo Pick ups (with built in pre-amps) and Keyboards Ect. 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 125 watts RMS to the internal speakers. Other Features include A 10 ft.detachable power cord with cord with built in l 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, Brown(sorry Brown Discontinued) or Black with Metal corners, a reinforced strap handle and black nylon grille cloth.                     Size 23x19x14" Weight 50lbs.