![]() When it comes to connecting the new head unit to the OEM amplifier, most people suggested soldering RCA cables/connectors to the speaker wire coming from he plugs behind the head unit and then connecting said cables in the corresponding inputs on the new head unit. Basically, what I'm aiming to do is use the new head unit (JVC KW-AV61BT) with the OEM speakers (powered by the OEM amplifier) and the new amplifier (Autotek Mean Machine M4000.1D) and subwoofer (Sundown Audio SD-2 10" 2-ohm DVC). Thank you so much for the detailed reply!įor starts, I figured I wouldn't be needing the CD changer anymore, as most of my music is just going to be played off of my iPhone or a flash drive. Might you know where I'd find the same radio wiring diagram for my 1997 LS400 non-Nakamichi system?Oh, the long windedness is is no biggy at all haha. They should be in the connector behind the head unit, there may be an adapter so you don't have to cut the connector off. If you wanted to keep the OE amplifier powering the speakers you would need to connect your new head unit to these 4 wires. Were you planning to still use the OE CD changer? This might get kinda tricky, might be easier to send it's signal to an AUX input on your new head unit if possible.Īnywho.If you are not gonna use the OE CD changer and want to feed all the speakers off of your new head unit and bypass the OE amplifier altogether that should be doable. Otherwise, none of the controls on the OE head unit would do anything to the signal coming from the CD changer, it doesn't go thru the head unit. It is just controlling these things which must be inside the OE amplifier, the actual pre-amp stage is inside the amplifier, not the head unit. This means that the OE head unit is only a radio, tape player and control panel for the EQ, fader, balance and volume. Whats weird about the OE system is that the CD changer does not connect to the head unit, it connects directly to the amplifier under the passenger seat. The amplifiers then send amplified signal to the speakers. The aftermarket head unit is also what is called a pre-amp, it takes all the signal inputs, radio, tape, CD, iPod etc., and sends the one you select at RCA/Line level to the amplifiers or to it's built in head unit amplifier. You can have things connected to the head unit feeding it signal like a CD changer, iPod etc. A basic aftermarket system starts with the head unit. ![]() If I'm reading the wiring diagram correctly, the OE system is not configured like an aftermarket system is. ![]() You might try the RCA connections off of your new head unit first to see what the OE amp wants to see. I'm not sure if the music signal coming from the OE head unit is at RCA level (called line level) or if it is at a higher level (called speaker level). What head unit, amp and sub are you installing?
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