Adding AUX port to '91 Infinity head unit

[Oklahoma Wolf]

You can blow the tweeters by pushing the deck's volume too far into distortion, but most of the time the onboard amps will save the woofers. There's a volume limiter built into them.

You can get black buttoned II's as well... my parts deck is like that. Came out of a 1989 LeBaron convertible that had rolled over. That deck was well cooked - its only use was for parts. Still, those decks are probably the most flaky ones out there. My first one kept reversing the tape for no reason (faulty reel sensor - came from a low miles Imperial), the second one kept cycling the loading mechanism thinking there was a tape in it (another Imperial deck), and the third one was totally dead. They're no fun to fix either because of how packed they are with electronics. Still, the electronic EQ on them is kind of neat.

[Rubix]

Yeah the only thing I miss on the infinity I is the equalizer. But for the rest it looks much nicer and if it's more durable, I think it's a better choice.

But if the amp can blow up the tweeters, then what is the advantage in having a more powerful amp? By the way, the beep you get when you reach max/min treble and bass when adjusting is a funny feature, you won't get it with the other systems I guess

[Oklahoma Wolf]

That's the other thing - the head unit's amp is only powering those tweeters, and 12 watts is enough for those dashboard dome models. Not that the 3 watt difference amounts to much either ;)

The beep is Infinity I only. The premium decks based on it also beep at you. They do that when the bass and treble is all the way up or down. If you hit (IIRC) set and then the up or down button on the bass and treble, it resets the control to midpoint.

The interesting thing is, Alfa Romeo used the Infinity I too:

eBay Motors: Alfa Romeo 164 (1991) Radio OEM stereo cass SERVICED (item 8046966873 end time Nov-27-08 20:23:06 PST)

Although, that is only the premium deck based on the I (no slave CD port).

[Rubix]

That's funny, I thought the radios had typical American measures. There also are Chrysler Infinity systems without the slave port according to a website, I really was afraid I had one of those and had to open up the machine to add an AUX jack. Is it correct that the front door speakers don't play high frequencies? The sound when I tested it (without the tweeters connected) was pretty flat but the bass tones were pleasingly deep and round.

[Oklahoma Wolf]

Yeah, there's the Infinity I and then there's the premium deck based on it. If you ordered Infinity though back then, you would have gotten the actual Infinity deck with the slave CD port. Often though you'll find the premium deck on an Infinity system when the original head unit failed (especially when the original was a flaky II, III, or Infinity IV CD player). Most 1985-1999 square faced Chrysler head units will interchange with each other.

The slave CD port is the only major difference between the two versions of the deck, but the premium model IIRC is also lacking the music search feature. Chrysler Huntsville built them (supplier 7910). You can actually switch the tuner to European spec, but I forgot how to do that long ago (if I ever knew how to do it on these particular models).

The door speakers should be playing bass and midrange up to about 2kHz or so, at which point the dash tweeters take over. The woofer amps have a crossover in them, and the tweeters have a crossover capacitor on them too.

[Rubix]

I think the sound will be pretty decent then when I install everything in the car.

You can switch to European spec by pressing [SET], then [SEL] and then the [1] five times. I wonder if there are more of that kind of procedures for the unit. It doesn't have a user interface unfortunately. I was hoping that it would display bass, treble and volume levels when adjusting.

[eduhernan]

Hi, I have a Infinity III deck installed on my '87 lebaron and works great, but I want to connect a cd-changer on it. I can? I have a Chrysler original cd-changer from a Stratus, but when i connect it to the deck it mute, and I can't see on the radio the buttons with cd-changer functions...

In this radio, it's possible switch to european spec? It hasn't the SEL button... And how I set the hour?

Thank you!
Eduardo

[mrglenn]

would love to see a pic of the speakers with the emit tweeters i have some ones with the new type dome tweeters,and also if you hook them up to a separate amp can you use their crossovers or how would you run them? I have a pioneer head unit and infinite speakers.

[Oklahoma Wolf]

Quote:

Originally Posted by eduhernan Hi, I have a Infinity III deck installed on my '87 lebaron and works great, but I want to connect a cd-changer on it. I can? I have a Chrysler original cd-changer from a Stratus, but when i connect it to the deck it mute, and I can't see on the radio the buttons with cd-changer functions...

The Infinity III is incompatible with all CD changers that rely on a direct connection to the deck - the port on the back was designed only for the single disc slave CD player, and contains no data bus or control circuitry for the changer. You need one of the two decks with the mode button to connect the changer to, like this one:



And it has to be the older Chrysler 6 disc changer to work as well. You can also get an interface from PIE to hook up certain Alpine M-Bus 6 disc changers.

Quote:

Originally Posted by mrglenn would love to see a pic of the speakers with the emit tweeters

Here you go:



These are found in the dash of 1988-1989 minivans and the rear of 1988-1989 LeBaron Convertibles only. To use them properly, you need to power the amps on them to keep the EMITs from being drowned out by the woofers. Requires running 12V to the amps and a speaker level input signal. Pinouts on them are red-amp 12V in, gray-amp ground, black-positive audio, green-negative audio.

[Rubix]

Then how would you control a single CD player with the other head units?

[Oklahoma Wolf]

The Infinity I, II, and III only connect to the single CD slave deck. What they do is provide the slave deck with power. When you insert a CD, the slave deck shorts one pin on the connector to ground - that tells the deck to mute the tuner or tape and let the CD player use the amp instead. That's it. The deck doesn't control the slave CD player... it's the other way around. In the same fashion, the slave CD deck will not work with the changer control deck I posted a picture of. The connector is identical, but not pin compatible.

Some old Chrysler RF modulated changers can connect to this jack on the Infinity I, II, and III as well, but they have their own control circuitry to work the changer with. It's the same idea, just different implementation.

[Rubix]

Thanks for the info :) So all the buttons are in the CD deck itself then. Still wondering, where would the CD deck be built in, in place of the cup holders?

[mrglenn]

thanks a lot I found two of them but will keep looking and i will hook up the amps,by the way how much power do these amps have?

[Oklahoma Wolf]

20 watts each at about 10% THD. The EMIT tweeters get their power right from the head unit.

Note that these amps tend to get bad solder joints in the amps... fortunately, they're not usually filled with Chrysler's potting compound of doom and it's fairly easy to get the cover off the amps so you can resolder them. I've had a few that needed work like that (I have about 14 pairs of these EMIT models).

[mrglenn]

do these emit models really sound a lot better than the dome tweeters,and would you sell any.