Mitsubishi 3000GT & Dodge Stealth Forum banner

The 315-Watt Mitsubishi/Infinity� CD Audio System with 7 Speakers

45K views 29 replies 12 participants last post by  Dave57  
#1 · (Edited)
The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

Prerequisite:

There is always someone that wishes to maintain that stock audio appearance in their car, I am a supporter of this. For about two years I have been playing around with ALL Mitsubishi stock audio as they relate to 3S audio in the several cars we have owned. I have always disliked the 1G audio and have not wasted any time testing it. The goal has been toward improvement not taking steps backwards. To this date that has included the purchase of 32 different Mitsubishi products. I have taken a mental note of the reliability of many of these products and the various quirks they may have while establishing a "Junk pile" of 7 radios and 10 cd changers. These were only the Non-refundable purchases! The main reason for such a large purchase of these radios was the pursuit of the late model "Stock Mitsubishi " radio that had compatible steering wheel controls. I would like to thank Mike Deal and Golfpro for their code assistance. Other research was steering wheel control addition particularly at it related to the 95 RT/TT.

The first (single din) Faq is here http://www.3si.org/forum/showthread.php?t=292127 . The Double Din Faq isn't complete.

I literally stumbled across this amp while in the process of buying mitsu radios for faqs. I came across a good deal 2 infinity dash speakers 4 door speakers, an infinity sub, radio and amp. These were all from a 2003 Montero Limited. The Headunit is in the 95 RT/TT now, and the speakers were sold all but the sub. So I consider the 315 watt amp free. :D I figured it would be a welcome upgrade for the wife's 99 infinity system. But It needed a sub since the infinity sub was clearly inferior. The national parts yard I buy many products from had an 05 Rockford Fosgate sub from a Nissan posted. I saw 4 wires on the plug and thought maybe it was powered. But it wasn't, it is an 8" dual voice coil 2 ohm sub. Go figure this is a stock audio speaker!

A quick look at the amp; yes its bigger and heavier and by mitsu specs it doubles the 3kgt amps. But does the stock amp plug I have fit? Yes! The next step was to verify the wiring. A post at the Montero site netted no replies for a wiring diagram. After a few months I noticed ebay now had Montero manuals with wiring diagrams so I bought the receiver diagram. It was a good thing I didn't plug it in as the power wires were on different terminals!
 

Attachments

Discussion starter · #2 · (Edited)
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

With the wiring not being compatible between the 99SL and the 03 Montero amp. (There was only 1 correct wire.) It was easier to pull all wires from the 99 plug and switch them to the Montero's wiring. (The amp plug has two wings that fold back. After you do that you need a jewelers screwdriver to release the nylon pin holders from the front. You just hold the pin lock tab on each pin so you can pull the pins. Once you get the first few it is really easy. )
Two wires were then added for the sub output because the 18 pin plug only has 16 wires and all 18 wires are needed for the Montero amp. With the new amp installed it had to be carefully tested to see if it was 1 ohm stable. Because if you connected the two voice coils in parallel it would equal 1 ohm. There were some cracking noises at 1 ohm so both voice coils were immediately connected in series and solved the amp stability issue.
 

Attachments

Discussion starter · #3 · (Edited)
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

Review:

The 99SL has Diamond 361 component speakers, stock infinity rear's, and now the Nissan sub. Aside from the sub it has a stock appearance. Smokin we need a 8" sub box for the right side preferably at a slant. (Smile) I would rate it at 3x better than stock with more than enough umph for the person that's not into the boom boom.... It made her car more enjoyable for me to drive too. Keep in mind that your hearing this from someone in their late 40's and not in their 20's. :D
 

Attachments

Discussion starter · #5 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

MaG18 said:
Funny you saw and heard this car :D
 
Discussion starter · #8 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

Thanks Bob and Brian :D

Of course we can't vote for the wifes audio so.

Brian received audio votes from us :) I liked the HU too :cool:

I'd love to have a blue 95 RT/TT if you both know what I mean!!

Now if I could find a stock one that plays MP3's .... and Smokin Made an 8" right corner box for us old guys...... it never ends.
 
Discussion starter · #13 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

TooFast4Radar said:
I saw this on e-bay, something you might find interesting:

http://cgi.ebay.com/PERIPHERAL-MITA...TER-MITSUBISHI-INFINITY_W0QQitemZ5817109340QQcategoryZ50546QQrdZ1QQcmdZViewItem

Supposedly you can use aftermarket amps with the stock Infinity amp using that cable.

Also, do you know if those single-din Infinity headunits will plug into a 91-93 car? I saw a 95TT with Infinity speakers using the non-Infinity double-din headunit and it was working. I've also seen the same headunit (looks the same) on 91-93 non-Infinity cars, but it's possible it's a different model headunit that just looks the same.
Thats a great cable! It can be used either way Stock HU on an aftermarket amp or replacement hu on the infinity amp. Check out my amp installation thread in my sig for the cable uses, and the 3si audio faq.
Anything is possible recently I made a plug and play adaptor to test non infinity stock units in infinity systems. ( a line output converter wired between two radio plugs 1 male and 1 female)
I have sold several infinity conversion kits they can be installed in any non infinity 6 speaker Mitsu. Eclipse and talon too.
 
Discussion starter · #15 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

Keith_from_GpTx said:
so was the only diff in wireing the amp the speeker out puts on the amp? what if anything else did u have to change?

can you post a pic showing what you had to do to fix the plug?

i am totaly into the factory idea if you read my post on my system i have the j-spec navigation dash. i have no idea what it can out of
Obviously the car had different speakers in the front but the wiring was never touched at the amp for that install (look in my sig for the link) The amp plug has to be rewired. The amp plug has two wings that fold back. After you do that you need a jewelers screwdriver to release the nylon pin holders from the front. You just hold the pin lock tab on each pin so you can pull the pins. Once you get the first few it is really easy.
 
Discussion starter · #18 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

golfpro said:
Excellent write up, and it sounds like you scored big points with Deb. Always a good thing. Great ideas on how to upgrade and still remain "stock."
-golfpro

She loves it! Her Dad said it's going to cause hearing damage :D LOL
 
Discussion starter · #19 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

L_P said:
Dave if you start collecting the plugs you could make an adapter and sell the amp and the plug as a kit, I bet you could sell quiet a few of them. do you know all the specs on the amp? RMs and max watt per channel?
-John
Need males and females though :D I guess you've done some pin pulling :)

RMS wattage??? If one would assume worse case and Mitsu to rate it at 315 Peak. So 160 RMS watts is reasonable Via the peak/2 formula. Or is it the peak x.707=220 watts formula that applies. But then again since the distortion spec never comes into play in these factory systems maybe its 315 watts rms @ 10% distortion. All we have to go by with these is the advertised spec. One good thing is they are still making the amp in 06 :cool:
 
Discussion starter · #21 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

L_P said:
So we dont know then....
do you have a model number? maybe something to go off of?
-John
John it is the Montero limited amp. Mitsu advertises it as 315w. More than triple the advertised power Dodge listed the infinity as in the 95 brochure I just looked at. But I have seen it advertised higher too! They don't say anywhere in any literature I have seen what the Rms specs are. The part # is visible in one of the pics I made sure of that. I have had this 03 amp for almost a year and a half and have tried a few times to get the specs online. Even bugged that online car stereo repair place that can get circuit schematics, and they say that info is not on them as it is not pertinent to their repair. So without the test equipment to determine its RMS output... It does sound like there is 40 watts at the doors and rears with a clear tweeter output, and the addition of the sub completes the system. The sub does not seem to be louder.
 
Discussion starter · #23 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

The headunit is the origional stock one. There is a pic of the car and HU here. http://www.3si.org/forum/showthread.php?t=217491

This amp works in a 3kgt with any stock (Mitsu) single or double din INFINITY Headunit that has a display. But there are only 4 Infinity HU's with Steering remote inputs.
 
Discussion starter · #25 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

L_P said:
Dave if you start collecting the plugs you could make an adapter and sell the amp and the plug as a kit, I bet you could sell quiet a few of them. do you know all the specs on the amp? RMs and max watt per channel?
-John
Well the amp cable connector's price is down from $28 to $13. I have an amp. I bought a cable and will make a kit, I'll put it on ebay at the end of the month or so.

CAR STEREO INSTALL KIT 70-7002 MISTSUBISHI 97-99

I guess they don't know it's good for 94-96 too :rolleyes:
 
Discussion starter · #27 ·
Discussion starter · #29 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

Dave, can you please email me a wiring diagram as well? nonstopmix at gmail.com
Might as well post it in this thread....Can't believe I found it.....:D

Seeing that uploading pdf's can be a challange with the size constraints ... LOL I must have done it in word at some point.....

I'll look for the pdf from the manual and see what I can do about editing it enough to post.
 

Attachments

Discussion starter · #30 ·
Re: The 315-Watt Mitsubishi/Infinity® CD Audio System with 7 Speakers

The montero diagrams
 

Attachments