This is the granddaddy of processors, and has pretty much every effect Boss when this device was released. COSM amp modeling, cab and mic modeling. The GP-100 allows you to put effects in any order, and pair them with one of several amp models. Way ahead of it\'s time, and dozens of effects- even many you can\'t even find on current effects units. Extensive midi control over amps, effects, and presets. You can control 16 parameters at once on any one of 400 patches. Mine is is great condition, works perfectly with a little rack rash. 8/10 condition, it has been kept in a rack for years, and used sparingly as I moved to software years ago. sale is for the GP-100 ONLY, as manual is easily downloaded online. Global buyers must be part of the Global shipping program. Please ask questions before offerding. +++++++++++++Features all the sounds of classic amps delivered by COSM technology. It has 14 preamp types for a variety of sounds and settings, 5 distortion types (including some famous BOSS pedal sounds), 12 types of speaker and mic simulators with extensive onboard effects and 2 send/return loops for external effects processing. With up to 400 different patches, built-in effects and multiple output options the GP100 gives you everything you need for great guitar sounds.The Roland GP-100 is a guitar preamp/processor that emulates the characteristics of tube amplifiers. The GP-100 uses Roland\'s new proprietary Composite Object Sound Modeling (COSM) technology to offer unprecedented versatility including amplifier modeling, speaker configuration, mic modeling and more. The computer modeling that COSM employs is far more effective than traditional tube emulation which uses transistors, and can truly sound like a variety of tube amps. The built-in multi-effects processor may be used to produce up to 16 effects simultaneously, including intelligent pitch shifting, flanger, phase shifter, reverb, etc. About the Roland GP-100:Roland GP-100 Technical SpecificationsArticle #1708295 Added on Mar 20, 2012 at 3:11 PMGP-100 Guitar Preamp/ProcessorAD CONVERSION (INPUT)22 bit (AF Method) 128 times Oversampling Delta-Sigma modulationAD CONVERSION (RETURN)18 bit linear 128 times Oversampling Delta-Sigma modulationDA CONVERSION18 bit linearSAMPLING FREQUENCY44.1kHzPROGRAM MEMORIES400: 200 (User) + 200 (Preset)NOMINAL INPUT LEVELInput: -10dBm / +4dBmReturn: -10dBm / +4dBmINPUT IMPEDANCEInput: 1M ohmReturn: 100k ohmNOMINAL OUTPUT LEVELOutput: -10dBm / +4dBmSend: -10dBm / +4dBmOUTPUT IMPEDANCEOutput: 2k ohmSend: 2k ohmDYNAMIC RANGE108dB or greaterCONTROLInput level knobOutput level knobVolume knobBass knobMiddle knobTreble knobPresence knobMaster knobParameter knobNumber/Value knobPreamp buttonGlobal buttonTuner buttonUtility buttonWrite buttonExit buttonMeter buttonEffect buttonPower switchDISPLAY16 charactors, 2 lines (backlit LCD)INDICATORSClip indicatorSignal indicatorButton indicatorsCONNECTORSInput jackHeadphones jackInput jackSend jacks 1/2Return jacks 1/2Output jacks A (L/Mono,R)Output jacks B (L/Mono,R)External Control jacks 1/2Effect Remote/Expression jackControl 1/2 jackMIDI Out/Thru connectorPOWER SUPPLYAC117V. AC230V, AC240VPOWER CONSUMPTION13WDIMENSIONS482(W) x 299(D) x 44(H) mm19(W) x 11-13/16(D) x 1-3/4(H) inches

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