I have a new to me 2004 GX470 Non-nav, no ML. I have already installed an Alpine ILX F509 in the dash (love it), and more than anything it has revealed the reality of the condition that the nearly 21 year old speakers are in. I've already ordered some Morel Maximo Ultra 603 MKII's for the front (6.5" 3-way setup with passive crossovers) and Morel Maximo Ultra Coaxial 602's (also 6.5") for the rear doors. I'll sort out the sub at a later time.
My first question is mostly about the signal being delivered to the front doors from the amp under the driver seat.
Is there an active crossover network in the amp? Do the lower woofers get a full range or low pass signal? What about the mid and tweeter? Are there passive crossovers in the doors or does each speaker get it's power directly from the amp independently of the others? If there is an active crossover in the amp or even an existing mid/tweet passive crossover, I may just install the speakers and feed them directly from the existing power leads and leave the Morel crossover out of the circuit until I upgrade the amp in the future. Something else I have noticed is that the balance and fade response seems a bit strange. If I go full front/left (or any other full corner position), I'm still hearing some sound on other speakers. I had Crutchfield prewire the harness, so it was all just plug and play for the install. Only thing I can think is that they have some mismatched wire pairs, but I would suspect I would be seeing other issues as well.
Next question is what are the inputs to the factory amp? FR, RR, FL, RL? I'm considering using these as speaker level inputs for the future amp upgrade if so, but it does leave me lacking a dedicated subwoofer channel that I can tune in the headunit and has me thinking about just running RCA's for all the channels. What is the fuse rating and wire gauge of the power circuit for the factory amp? I'm leaning towards a JL Audio XDM 700/5 (75 x 4 rms into 4 ohm + 300 x 1 rms into 2 ohms) and it calls for (I think) a 60 A feed with 4 gauge power and ground and I would be shocked if the factory amp is using anything approaching that.
Since the rears are coax replacing coax, I don't really have any concerns there.
I did seach the threads and did not find any clear answers to these questions, so if it is out there, I apologize.
My first question is mostly about the signal being delivered to the front doors from the amp under the driver seat.
Is there an active crossover network in the amp? Do the lower woofers get a full range or low pass signal? What about the mid and tweeter? Are there passive crossovers in the doors or does each speaker get it's power directly from the amp independently of the others? If there is an active crossover in the amp or even an existing mid/tweet passive crossover, I may just install the speakers and feed them directly from the existing power leads and leave the Morel crossover out of the circuit until I upgrade the amp in the future. Something else I have noticed is that the balance and fade response seems a bit strange. If I go full front/left (or any other full corner position), I'm still hearing some sound on other speakers. I had Crutchfield prewire the harness, so it was all just plug and play for the install. Only thing I can think is that they have some mismatched wire pairs, but I would suspect I would be seeing other issues as well.
Next question is what are the inputs to the factory amp? FR, RR, FL, RL? I'm considering using these as speaker level inputs for the future amp upgrade if so, but it does leave me lacking a dedicated subwoofer channel that I can tune in the headunit and has me thinking about just running RCA's for all the channels. What is the fuse rating and wire gauge of the power circuit for the factory amp? I'm leaning towards a JL Audio XDM 700/5 (75 x 4 rms into 4 ohm + 300 x 1 rms into 2 ohms) and it calls for (I think) a 60 A feed with 4 gauge power and ground and I would be shocked if the factory amp is using anything approaching that.
Since the rears are coax replacing coax, I don't really have any concerns there.
I did seach the threads and did not find any clear answers to these questions, so if it is out there, I apologize.