The Official Double-Din Monsoon Aftermarket Amp+Sub(s) Install Guide

[JS0214BM]

I'm not sure what you mean by a common ground. The Amp's (MTX280) high level input terminals include -
+ Left channel - Spliced to the + Left Channel Monsoon wire aft the monsoon amp.
+ Right channel - Spliced to the + Right Channel Monsoon wire aft the monsoon amp.
- Ground - There is only one negative high-level input terminal on the amp.
How do I connect to this terminal? I'll post a diagram later. Any Help would be appreciated.

[slvrstneGTi]

anyone have tips or tricks on where to place the power wire from the battery to the trunk after it goes through the fire wall?

[billy2.0]

After getting mine through the firewall, I took off the bottom panel underneath the dash on the drivers side and ran it above where it was safe and then dropped it down the side and ran it all the way back. Take off the dead pedal and you can tuck it underneath the side trim and then continue to tuck it under the sill all the way to the back where I popped it out from under the carpet. Works real good for me. Let me know if you want to see some pics and I will go take some tonite and post them.

[Nullunit2000]

Does anyone have a pic showing where the firewall gromet is on a 2001 Jetta. I've looked everywhere and can't find it.

[user name unknown]

I ran my power wire under the panel right next to the gas pedal. The panel runs along the center console all the way to the rear seats. I then just used black wire wrap and wrapped the power wire in that and then ran the rest of the power wire under the rear seats to the amp where you put it.

For the firewall grommet on a 2001 Jetta, it should be in the exact same spot as the GTI/Golfs. Check again...

[slvrstneGTi]

thanks for the help, but now i've got another probelm, the auto relay i got from radio shack doesnt show me what relay coils A, B, common, and N.O. terminals are....this is what it says from top going clockwise looking at the bottom of the relay....
on/off switch12V---12V in---Ground---12V in/out
ive got an idea of where to put them, but im just want to make sure.

[user name unknown]

I wish I could help ya on that one...but I didn't do the relay to mine.

On a side note: I would still like to know if anyone with a Double-Din NON-MONSOON sound system has used my tutorial? I would like to know how everything turned out. I understand that there is no Monsoon amp to use to tap the LOC into. I would like to know where you tapped the LOC into.

[slvrstneGTi]

how did the guy short his remote turn on for his HU?

[chet12]

Quote, originally posted by slvrstneGTi »

thanks for the help, but now i've got another probelm, the auto relay i got from radio shack doesnt show me what relay coils A, B, common, and N.O. terminals are....this is what it says from top going clockwise looking at the bottom of the relay.... on/off switch12V---12V in---Ground---12V in/out ive got an idea of where to put them, but im just want to make sure.

Hey, mine is like this, using pretty thin wire:

12V in (87): from +12V terminal on amp
ground(85): ground
12 V OUT (30/51): to amp remote input
on/off switch 12V (86): from CD harness

-- Michael

[user name unknown]

BUMP...

I would still like to know if anyone with a Double-Din NON-MONSOON sound system has used my tutorial? I would like to know how everything turned out. I understand that there is no Monsoon amp to use to tap the LOC into. I would like to know where you tapped the LOC into. ANYONE?

[slvrstneGTi]

Thanks , i was about to return it but now im just debating if this is really necessary. user name... doesnt use one, his is fine. chet12, you use one and you get that bumping noise after you shutoff your HU. anyway thanks for the help

[user name unknown]

Quote, originally posted by slvrstneGTi »

Thanks , i was about to return it but now im just debating if this is really necessary. user name... doesnt use one, his is fine. chet12, you use one and you get that bumping noise after you shutoff your HU. anyway thanks for the help

to add to that...I am still not using one and I am also running a Phatbox off of the CD-changer harness now. I am testing it out to see if I like it. And still I have yet to blow anything [knock on wood].

[phin]

Ok, I did this on a 2003 GTI. The power and remote both work, but no sound. I used an LOC from Best Buy. Is there any way I can test the LOC or RCA cables?

[user name unknown]

Are you sure the subs are hooked up correctly?

[phin]

Quote, originally posted by user name unknown »

Are you sure the subs are hooked up correctly?

I pulled the amp and sub right out of my other car. So it was working before.

[phin]

Another thing: the wires for the Monsoon harness weren't exactly as you described. They were black with brown underneath and then white with black underneath. I followed your instructions and used the black wires as the negative. I think it was like this:

Bl Wh
Br Bl

[user name unknown]

That is weird. I will have double check to make sure the wires are where I said they were. All of the positive wires should be on one side and all the negative wires (black) should be on the other.

+ -
+ -
+ -
+ -

You are saying they were like this?
+ -
- +
+ -
- +

[phin]

Quote, originally posted by user name unknown »

That is weird. I will have double check to make sure the wires are where I said they were. All of the positive wires should be on one side and all the negative wires (black) should be on the other. + - + - + - + - You are saying they were like this? + - - + + - - +

Exactly like that.

[user name unknown]

Mine are like this:

+ -
+ -
+ -
+ -

[phin]

Quote, originally posted by user name unknown »

Mine are like this: + - + - + - + -

Well I kept black as negative. Shouldn't I still get a little bit of sound even if I only got one right?

[user name unknown]

Quote, originally posted by phin »

Well I kept black as negative. Shouldn't I still get a little bit of sound even if I only got one right?

You should at least get something coming out of the speaker.

[lvleph]

After I figured out where the gromet was, things were only really complicated by deciding where to send the power cable. All the colour codes are the same for the 2004 VW GTI 1.8T by the way. Thank you for the post. I was trying to figure out how I was going to hook up my subs on my 2003 Jetta forever, and then it got totaled, so I decided that I should look for something this time. Again Thanks.


Modified by lvleph at 7:20 AM 2-2-2004

[Bee19]

About to try this in my 2002 Golf. I will use the relay just to be safe. Since this post has been up for a while now, are there any updates from people who have used this system for a while? I am ultra-careful about blowing things up (I have a history of it) so I wanted to be sure this method is safe for long or short term use. I like the stock deck, does Clarion still make them? I think so. But it's nice enough for me. I just want a little extra bump, and to keep the car stock looking.

[user name unknown]

I have been using the setup for 2 years now. I am not using a relay for my remote wire either. Everything is going great. Never had a single problem.

[flashback]

hey ok just wanted to add a litlte something to this.... a GREAT ground point for high powered(or lowe power) amps is the driver side seat belt bolts... you probalby have to sorta cut and bend a ring connector to fit arround it... but its about the best oint there is in a GTI

[user name unknown]

Yeah, grounding points are key. The original one that I have been using has been great.

[phin]

More weirdness. I'm using the same ground that was used in the first post of the thread. My amp is getting 12V with the stereo off, but when I turn it on it drops to about 4-5V. The remote is getting about 13-14V.

Any ideas? I tried a different ground and it had the same effect. I'm also still having the problems with the LOC. Has anyone got this install to work on a 2003 GTI?

[user name unknown]

That is weird. You should not ben getting anything with the stereo off. If you have the remote wire tapped into the right wire at the cd-changer harness...you should be good.

[phin]

Quote, originally posted by user name unknown »

That is weird. You should not ben getting anything with the stereo off. If you have the remote wire tapped into the right wire at the cd-changer harness...you should be good.

The amp isn't powering on unless the stereo is on. Shouldn't the power wire always get 12V, no matter what? The remote is working correctly. It's powering the sub (and my XM) but the voltage to the amp drops significantly when it turns on.

[user name unknown]

OK, when your headunit is off, it does not send a signal to the remote wire; thus making you amp not turn on. When you turn your headunit on, it sends a signal to the remote wire which turns your amp on.

As for the voltage readings, that seems weird. Where are you testing the power wire voltage? Right where it connects to the amp?

[phin]

Quote, originally posted by user name unknown »

OK, when your headunit is off, it does not send a signal to the remote wire; thus making you amp not turn on. When you turn your headunit on, it sends a signal to the remote wire which turns your amp on. As for the voltage readings, that seems weird. Where are you testing the power wire voltage? Right where it connects to the amp?

I understand how the remote works. It's doing it's job (telling the amp to power on).

I have the postive probe on the power in on the amp. The negative probe on the little latch ground. I also tried two other grounds. I have a fuse on the power wire so I don't think it's hitting a ground elsewhere. (the fuse would die right?)

[phin]

I forgot to add.. The voltage drops instantly when the HU is powered on. The volume and bass amount makes no difference.

[user name unknown]

Then what exactly is the problem besides the voltage droping when you turn the stereo on?

If the system is stable even with the voltage droping to 4-5 volts, then something must be drawing the power.

[buggofast]

all this makes my head hurt!

[phin]

Quote, originally posted by user name unknown »

Then what exactly is the problem besides the voltage droping when you turn the stereo on? If the system is stable even with the voltage droping to 4-5 volts, then something must be drawing the power.

The problem is that I'm not getting any sound from my subwoofer. I had the speaker tested and it's fine. Like I said before, I've tapped and re-tapped the input/output wires from the Monsoon amp. I just can't get a single bit of sound from the sub.