I've added two 118 dB rated piezo sirens to my security system. I placed these under the HU with the intention that anyone daring enough to attempt to take my HU would not be very likely to enjoy being in the vehicle.
These particular units are fairly small in size, but they aren't called 'pain makers' for nothing. ;)
(IMG:http://img284.imageshack.us/img284/4902/imag05678ty.th.jpg)
(IMG:http://img284.imageshack.us/img284/4821/imag05689xe.th.jpg)

I made a small ABS braket to mount them together and extended the wires to reach to my alarm brain.
(IMG:http://img284.imageshack.us/img284/3576/imag05835sz.th.jpg)
(IMG:http://img284.imageshack.us/img284/5609/imag05846nm.th.jpg)

A quick shot of them mounted in place:
(IMG:http://img284.imageshack.us/img284/4921/imag05947ov.th.jpg)


While the amount of sound outside the vehicle does not drastically change (with windows up), the amount of sound inside makes for an extremely painful experience. So even if I can't hear my alarm and my pager is out of range, bumping, tilting, or other molesting of the vehicle will cause these to go into action. While they probably have no effect on external vandalism of the vehicle, at least the likelyhood of anything major being removed from the interior is reduced, which is my main concern anyways.

For this next portion of the install, I used two of the same 118 dB piezo sirens and two 130 dB multi-tone sirens, which are similar to the one under my hood. The car now has a total of seven sirens and the effect is quite nauseating. Being inside the car has moved beyond painful and is now all but impossible to stand, given a naked ear.


Here are some pictures to help tell the tale.

After failing to snake through one of the gromets in the trunk floor, I chose to make my own path. I popped a hole from the bottom between the bumper and sub box to run the wiring for the 130 dB sirens.
(IMG:http://img347.imageshack.us/img347/8789/imag05981vi.th.jpg)
(IMG:http://img347.imageshack.us/img347/7530/imag06042or.th.jpg)

The wiring I used was just some 16 ga speaker wire. It runs along side my amplifier wiring to the alarm brain.
(IMG:http://img347.imageshack.us/img347/4316/imag05990ho.th.jpg)
(IMG:http://img347.imageshack.us/img347/1262/imag06004qc.th.jpg)

Mounted sirens:
(IMG:http://img347.imageshack.us/img347/2/imag06013wm.th.jpg)
(IMG:http://img347.imageshack.us/img347/3954/imag06031ha.th.jpg)



The set of piezos puts the OEM tweet holes to a much, much better use than the paper cone jokes previously did. Their locations work out very nicely for this purpose and the OEM grills give it a nice stealthy touch. :)

Driver's side test fit:
(IMG:http://img347.imageshack.us/img347/5740/imag06123fj.th.jpg)

Driver's side mounted. You can see where I had to C-notch the grill frame. Other than that one, small modification, these sirens were a perfect fit. :)
(IMG:http://img347.imageshack.us/img347/4818/imag06246ei.th.jpg)

Passenger side mounted:
(IMG:http://img347.imageshack.us/img347/7842/imag06086ds.th.jpg)


Passenger side installed. Even with the foam removed from the grill, you still can't tell there is anything menacing hiding under there. :D
(IMG:http://img347.imageshack.us/img347/5894/imag06193da.th.jpg)

Wiring the pass side piezo was a real pain, I first tried to snake across the dash from the pass side through the tweet hole, but I kept getting snagged on the cluster. So instead, I went from the driver's side behind the console, to the underside of the pass side dash, then up to the tweet hole. It was a slightly longer run, but ended up being easier.
(IMG:http://img259.imageshack.us/img259/694/imag06184xu.th.jpg)


Lastly, a little about the DEI tilt unit that I've added to my Compustar alarm system.
(IMG:http://img259.imageshack.us/img259/5070/imag06363se.th.jpg)

This piece can either trip at 1 degree or 3 degrees of tilt. Unlike a mercury ball sensor, this one constantly recalibrates untill armed, so parking on a hill or otherwise angled surface will not cause a false alarm.

The unit itself has a fairly small footprint, as shown in this comparison to a CVR 12:
(IMG:http://img259.imageshack.us/img259/4018/imag06304ip.th.jpg)

The 850 has a great mounting spot for this under the OBD-II port:
(IMG:http://img259.imageshack.us/img259/8062/imag06378ny.th.jpg)
(IMG:http://img259.imageshack.us/img259/8437/imag06383dj.th.jpg)

The testing of this piece with our jack made for some serious head aches. :rolleyes: However, the alarm goes off before the wheels are even close to leaving the ground, so at least it works!

There still are a couple of ideas that I've yet to apply, as far as security is concerned, but who knows when time will allow for these. :lol:

Due to the photo posting limitations in this forum software, I had to shop this topic into a few posts. Sorry.

I own a 2002 V40 and at this point if someone stole it it couldn't be a better solution to my problems with the car!!!

I would givethem a BIG :liebe011: :liebe011: :liebe011:

I'm not worried about someone taking the whole car. I'm far more concerned with the custom work I've done inside that will take me many hours to reproduce.

Cool work!
:)

Owned,
Thank you for the write up. Great pics. I know in the summer stolen car numbers rise and anything that will help keep someone away from my car, I like it! :gunsmilie:

Is it a Phase1, 1st Generation?