KENWOOD 4-CHANNEL POWER AMPLIFIERKAC-646INSTRUCTION MANUALKENWOOD CORPORATION© B64-0763-00 (K) (MC)Take the time to read through this instruction manual.Familiarity with installation and operation procedures will help you obtain the bestperformance from your new power amplifier.For your recordsRecordtheserialnumber,foundon thebackoftheunit,inthespaces designatedon thewarrantycard,andinthe spaceprovided below.Refertothemodelandserialnumberswheneveryoucalluponyour`KENWOODdealerforinformationorserviceon theproduct.Model KAC-646 Serial numberAWARNINGTake the following precautions to preventtire and avoid personal injury:When extending the battery cable, or groundcable, use 3mm? (AWGT2) or larger automotivegrade cable to avoid cable deterioration ordamage to the covering.e Check that no metal objects (coins, tools, etc.)are left inside the unit to avoid short circuits.+ If you smell or see smoke, turn the power offimmediately and consult your Kenwood dealer.* Do not touch the unit during use because thesurface of the unit becomes hot and maycause burns if touched.ACAUTIONTake the following precautions to keepthe unit in proper working order.+ Be sure the unit is connected to a 12V DCpower supply with a negative groundconnection.¢ Do not open the top or bottom cover.+ Do not install the unit in places it is exposed todirect sunlight, high heat or humidity, watermay splash over it, or dust exists.NOTE+ lf you have difficulty in installing this unit inyour vehicle, contact your Kenwocd dealer,Cleaning the unit+ ifthe surface is dirty, wipe it clean with asilicon cloth or soft dry cloth with the poweroff.ACAUTIONDo not use hard cloths or paint thinner, alcohol, orother volatile solvents. These may damageexternal surfaces or remove indicator characters,FCG WARNINGThis equipment may generate or use radiofrequency energy. Changes or modifications tothis equipment may cause harmful interferenceunless the modifications are expresslyapproved in the instruction manuai. The usercould lose the authority to operate thisequipment if an unauthorized change ormodification is made.| Accessories —External Number ofSelf-tappingscrews(94 x 16mm)Terminal cover(Powerterminal}