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Message: <blockquote data-quote="lking78" data-source="post: 1561195" data-attributes="member: 32586">1996 cobra convertible with mach 460 sound system OEM apologize up front for newbie questions and phrasing -- this is not something i have messed with before -- per a youtube video, i took out the radio and CD player and moved the heater/ ac controls to the bottom slot -- i opted to go this route rather than the Metra dash panel because the advantage, to an old man, is that the screen is higher -- so i don't have to look away as much to interact with the screen or see what the navigation directions are telling me -- i found a unit that fits perfectly and all that is left is to figure out the wiring -- 1.  i was able to find a schematic for the base radio -- the wires in the car match the colors in the schematic except the car has2 wires that are 'extra' -- a dark blue and an orange/gray -- also found a 'premium' sound system schematic that references a  'super sound' -- and it has a blue wire for 'audio mute' and an orange/lt blue for 'audio system on'  i don't see any similar inputs/wires with the touchscreen -- just ignore ??2. the OEM radio had 3 connectors (plus ground and antenna) -- a long 10 pin -- and 2 squarish -- one has 2 rows of 4 connections which i assume are the 4 speakers shown in the base schematic -- the second squarish has 2 rows of 3 connections -- what is that connector for ? 3. the base schematic and the device i hope to upgrade to has connections for 4 speakers -- but i count 8 speakers in the cobra -- so do i assume that the wires going to 'right door speaker' feed both the upper and lower speakers in the rt front door ?4. some youtube videos state you need to add a step down resistor because the Mach 360 system uses a non-standred wattage input --and others don't mention it at all -- which is the case ??many thanks for your help and suggestions --    [ATTACH]40118[/ATTACH][ATTACH]40119[/ATTACH][ATTACH]40120[/ATTACH]</blockquote>