The A1504+ is the smallest cabinet design featuring a 15 inch speaker with 2 tweeters and crossover. The cabinet is small enough to easilly move around, yet the the punch of a 15" speaker. 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 60 watts RMS to the internal speakers. Other Features: an 8 ft power cord with cord wrap bracketts, 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 Black SRo Carpetwith metal corners, a reinforced strap handle and a black nylon grille cloth.                       Size 21x17x12" Weight 44lbs.